DisplayCAL Changelog

What's new in DisplayCAL 3.8.9.3

Dec 16, 2019

Cosmetic: UI: Improve PCS to device gamut outline plot.
Blocker: Linux, macOS: Fix failure to launch if initial install (regression of lockfile change in 3.8.9.2)

New in DisplayCAL 3.8.9.2 (Dec 13, 2019)

New in DisplayCAL 3.8.9.1 (Dec 9, 2019)

New in DisplayCAL 3.8.8.0 (Nov 7, 2019)

Changed in this release:
Enhancement Detect and warn about malformed colorimeter corrections (e.g. from non-official sources). Move them to the trash automatically if they were previously (manually) installed.
Enhancement Always enumerate instruments on application startup if more than one instrument was detected the last time the application was used (cross-platform consistency).
Enhancement When prompting for instrument calibration, display the just now detected instrument name instead of the previously enumerated name (the latter might be stale if you forgot to refresh after changing connected instruments).
Enhancement Use a slightly improved smoothing method when creating high resolution PCS to device tables.
Enhancement Increase automatic PCS to device table resolution for L*a*b* LUT profiles to 45x45x45 if using smoothing.
Enhancement UI Only auto-close profile/3D LUT installation dialog after a successful installation.
Enhancement Don't auto-close madTPG after 3D LUT installation.
Enhancement macOS: Warn if a black luminance calibration target is set.
Enhancement Profile loader (Windows): Use a minimally faster method to check for other running applications.
Fixed in this release:
Minor madVR 3D LUT generation: Always write D65 white to 3D LUT input primaries metadata so madVR does not attempt to correct whitepoint differences on its own when using a custom whitepoint (the 3D LUT itself will map the custom whitepoint correctly).
Minor madVR 3D LUT installation: Don't attempt to install 3D LUTs with unsupported input primaries metadata (i.e. not Rec. 709, SMPTE C, EBU/PAL, Rec. 2020 or DCI P3) as madVR will overwrite the metadata depending on the 3D LUT install slot. Such 3D LUTs should only be assigned manually in madVR instead.
Trivial UI When loading settings, always enable the 3D LUT tab if the display is virtual (consistent with display selection behavior).
Trivial Also apply black point correction when creating a matrix profile without black point compensation (consistency).
Trivial Do not create swapped matrix fallback tags for XYZ LUT profiles when using the alternate forward profiler and the used ArgyllCMS version is >= 2.1 (be consistent with ArgyllCMS).
Trivial madVR 3D LUT generation: Accept negative values for input primaries metadata.
Trivial madVR 3D LUT installation (Linux, macOS): Send the 3D LUT in chunks and increase the timeout to prevent the installation failing over a slow network (e.g. WiFi).
Cosmetic UI Profile loader (Windows): Prevent a stale tray icon remaining (until mouse over) in some rare cases after exiting the profile loader.
Trivial Profile loader (Windows 7): Skip incomplete display configuration registry entries.

New in DisplayCAL 3.8.7.1 (Oct 2, 2019)

New in DisplayCAL 3.8.7 (Sep 23, 2019)

New in DisplayCAL 3.8.6 (Sep 6, 2019)

New in DisplayCAL 3.8.5 (Aug 14, 2019)

New in DisplayCAL 3.8.4 (Aug 12, 2019)

New in DisplayCAL 3.8.3 (Aug 12, 2019)

New in DisplayCAL 3.8.2 (Jun 10, 2019)

New in DisplayCAL 3.7.2.0 (Mar 18, 2019)

New in DisplayCAL 3.6.2.0 (Aug 27, 2018)

New in DisplayCAL 3.6.1.0 (Aug 6, 2018)

Added:
Feature Adjustable hue preservation (values less than 100% will gradually hue shift very bright and saturated redorange/orange/yellowgreen hues to a more yellowish tone, preserving more saturation and detail) for HDR SMPTE 2084 3D LUTs with roll-off tonemapping (default 50%).
Feature Ability to set a calibration target luminance by measuring the ambient light level.
Feature Verification tab: Hold the “alt” key on your keyboard to create a profile or device link (3D LUT) self check report instead of a measurement report.
Enhancement DCI P3 D65 profile for use as 3D LUT source colorspace or measurement report simulation profile.
Changed:
Enhancement Increased the default number of patches for the madVR HDR preset back to 425.
Enhancement HDR 3D LUT SMPTE 2084 tonemapping: Restored near black tone reproduction for displays with non-zero black level and output offset less than 100% to pre-v3.6 values.
Enhancement Improved HDR 3D LUT SMPTE 2084 tonemapping speed.
Enhancement Improved HDR 3D LUT accuracy for colorimetric rendering intents.
Enhancement Increased default display update delay for Resolve preset to 1000 ms.
Enhancement Quantize Autodesk/Kodak (.3dl) 3D LUT values by always rounding up (match the format specification in the Lustre user guide).
Enhancement Limit the number of concurrent worker processes depending on system memory to avoid swapping.
Enhancement Always normalize CGATS data to Y = 100 when processing files not created by DisplayCAL.
Enhancement Get the black level for computation of 3D LUT or verification target tone curves from the embedded characterization data if a lookup through the display profile returns zero (makes e.g. Rec. 1886 work properly in that case).
Enhancement Synthetic ICC profile creator: Increase number of decimal digits for black level to 6 and do not clamp to 16-bit integer values to offer more fine grained control.
Enhancement Linux: Use configured XDG “well known” user directories (currently only used to determine the localized name of the “Downloads” directory).
UI Moved HDR 3D LUT SMPTE 2084 tonemapping luminance/saturation/hue preservation controls to advanced options (hidden by default).
Fixed:
Moderate madVR 3D LUT generation via the main application: When using a non-standard source colorspace whitepoint (by setting a calibration whitepoint target different from the source colorspace's original whitepoint, e.g. not using DCI white for DCI P3), non-standard values for input primaries and whitepoint were written to the 3D LUT header, madVR 3D LUT slot auto-detection for installation did not work if the source colorspace was not Rec. 709, and color conversion was affected if the 3D LUT was not installed via the madVR API (i.e. by not clicking the “Install 3D LUT” button, but choosing the 3D LUT manually in madVR's settings).
Minor Downloads within DisplayCAL failed if the download directory didn't exist (regression of changes made in DisplayCAL 3.5, SVN revision 5081).
Minor HDR 3D LUT SMPTE 2084 tonemapping for non-Rec. 2020 source colorspaces did not work correctly (Rec. 2020 was assumed despite different choice).
Minor Standalone 3D LUT maker: Don't unexpectedly switch to the source profile's gamma for simple gamma + matrix source profiles (e.g. DCI P3) when creating a 3D LUT.
Minor Profile loader (Windows): Catch errors in case of a corrupted Windows registry.

New in DisplayCAL 3.6.0.0 (Jun 23, 2018)

Added:
Feature Adjustable weighting between luminance and saturation preservation for HDR SMPTE 2084 3D LUTs with roll-off tonemapping.
Feature Option to adjust the roll-off for HDR SMPTE 2084 3D LUTs with roll-off tonemapping when the mastering display peak luminance is below 10000 cd/m² (previous behavior with the introduction of BT.2390-2 was to always adjust, the new default behavior is don't adjust).
Changed:
Enhancement Improved HDR 3D LUT SMPTE 2084 roll-off tonemapping to eliminate possible over-darkening in rolled-off highlights due to luminance reduction related effects.
Enhancement Removed HDR 3D LUT SMPTE 2084 roll-off tonemapping allowance for hue shifts in rolled-off highlights.
Enhancement Increased HDR 3D LUT SMPTE 2084 default target peak luminance to 480 cd/m² (makes BT.2390 roll-off leave 0-100 cd/m² alone).
Enhancement Use extended model for HDR 3D LUT Hybrid-Log Gamma (HLG) display gamma adjustment described in BT.2390-4.
Enhancement Do not create PCS-to-device tables for synthetic HDR SMPTE 2084 profiles with roll-off tonemapping as they are meant purely as source profiles.
Enhancement Only enable the visual whitepoint editor button if the whitepoint target is set to chromaticity coordinates.
UI Keep dropdowns with only one choice enabled.
Cosmetic Catch any madTPG connection errors to show a nicer error dialog without a traceback.
Trivial Do not update the profile description when increasing the effective resolution of an existing profile's PCS-to-device tables.
Trivial Testchart editor: Only limit the view to six decimal digits, not the underlying data.
Fixed:
Minor Confirm instrument placement when madTPG is not fullscreen.
Minor Creating synthetic grayscale profiles with HLG tone response did not work correctly.
Trivial Set allowed filetypes for selecting files when importing 3rd party software colorimeter corrections to “any”.
Trivial Mac OS X: Updated bundled Python to 2.7.15 which includes a recent version of OpenSSL (fixes SSL connection errors due to more recent server-side encryption when using the standalone application bundles).
Trivial Mac OS X: Restored correct BundleId for application bundles.
UI Linux (GTK3 under Wayland): Explicit refresh/update needed for ClientDC (fixes graphs not updating until the window is resized).

New in DisplayCAL 3.5.3.0 (Apr 26, 2018)

New in DisplayCAL 3.5.2.0 (Apr 6, 2018)

New in DisplayCAL 3.5.0.0 (Feb 19, 2018)

Added:
Feature Support the madVR HDR 3D LUT installation API (madVR >= 0.92.13).
Changed:
Enhancement In case of a download problem (e.g. automatic updates), offer to visit the download URL manually.
Enhancement Security: Check file hashes of application setup and portable archive downloads when updating DisplayCAL or ArgyllCMS.
Enhancement Security: Use HTTPS for ArgyllCMS download as well.
UI New application icons and slightly refreshed theme.
UI Improved HiDPI support by adjusting relative dialog button spacing, margins, and interactive display adjustment window gauge sizes to match proportionally regardless of DPI.
UI Improved visual consistency of tab buttons (don't lose “selected” state if clicking on a button and then moving the mouse outside of it, “hover” state does no longer override “selected” state, keyboard navigation skips over selected button).
Cosmetic Measurement report: Make patch preview take into account the “Use absolute values” option again.
Cosmetic Measurement report: Colorize CCT graph points according to change in hue and chroma.
Cosmetic Measurement report: Colorize gamma graph points according to change in gamma.
Cosmetic Measurement report: Dynamically adjust gamma graph vertical axis to prevent cut-off.
Cosmetic Measurement report: Make RGB balance graph match HCFR (Rec. 709 only). Note that new and old balance graphs are only comparable to a limited extent (use “Update measurement or uniformity report” in the “Tools” menu to update existing reports).
Cosmetic Profile loader (Windows): Unset non belonging profile when resetting a profile association.
Mac OS X: Set default profile type to single curve + matrix with black point compensation due to long-standing Mac OS X bugs with any other profile type.
Fixed:
Moderate Unhandled exception and UI freeze when the 3D LUT format was set to madVR and there never was a prior version of ArgyllCMS on the system or the previous version was older than or equal to 1.6.3 during that same DisplayCAL session, due to a missing capability check.
Moderate Division by zero when trying to create a SMPTE 2084 HDR 3D LUT if the profile black level was zero (regression of a change in DisplayCAL 3.4, SVN revision r4896).
Minor If using the alternate forward profiler and the profile type was XYZ LUT + swapped matrix, the swapped matrix was overwritten with an accurate one (regression introduced in DisplayCAL 3.3.4, SVN revision r4736).
Minor It was not possible to run a measurement report with a simulation profile set as display profile, but no profile assigned to the actual display.
Minor Rec. 1886 measurement report with originally non Rec. 709 tone response profile: Make sure to override the original tone response of the profile so Rec. 1886 gives the expected result.
Minor If a measurement report HTML file was mangled by another application that removed the XML self-closing tags forward slashes, it was not possible to correctly update the report using “Update measurement or uniformity report” from the “Tools” menu.
Minor If using a pattern generator, check it is valid before binding a disconnect-on-close event when using the visual whitepoint editor. Prevents an attribute error when using the visual whitepoint editor and the madTPG network implementation (i.e. under Mac OS X).
Minor Windows: Always use the active display device directly when querying or setting profiles instead of mimicking applications using the Windows GetICMProfile API (fixes getting the correct profile with display configurations consisting of three or more displays where some of them are deactivated).
Minor Profile loader (Windows): Check whether or not a display device is attached to multiple adapters and disable fixing profile associations in that case.
Minor Profile loader (Windows): Work-around hitching caused by Windows WcsGetDefaultColorProfile API call on some systems.
UI Measurement window: Make sure focus stays on the last focused control when the window itself gains focus again after losing focus.
UI Synthetic ICC Profile Creator: Update HDR SMPTE 2084 diffuse white info text when changing luminance.
Trivial HDR SMPTE 2084 3D LUT: Interpolate the last two segments before the clipping point of the intermediate input LUT shaper curves (prevents potential slight banding in highlights).
Trivial Windows: Make sure the profile loader is launched directly after installing a profile when using a portable version of DisplayCAL (parity with installer version).
Trivial Profile loader (Windows): Re-introduce --skip command line option.
Cosmetic Profile loader (Windows): When disassociating a profile from a device, suppress ERROR_PROFILE_NOT_ASSOCIATED_WITH_DEVICE error sometimes (in some cases always?) resulting from the WcsDisassociateColorProfileFromDevice Windows API call, even though the profile was successfully disassociated.

New in DisplayCAL 3.4.0.0 (Jan 4, 2018)

Added:
Feature HDR Hybrid Log-Gamma transfer function option for 3D LUTs.
Feature HDR verification testcharts.
UI Simplified chinese translation thanks to 林泽帆(Xpesir).
Enhancement Linux: wxPython Phoenix 4.0.0b/rc1 compatibility.
Enhancement Profile loader (Windows): Notifications (for 3rd party calibration/profiling software and user-defined exceptions) can be turned off.
Changed:
Enhancement HDR 3D LUTs: SMPTE 2084 with roll-off now allows specifying the mastering display minimum and peak luminance which are used to adjust the roll-off start and clipping points (BT.2390-3).
Enhancement HDR 3D LUTs: Chroma compression is now done in Lpt color space, providing improved preservation of detail in compressed highlights.
Enhancement Do not disable the measurement report button if the selected setting is a preset and a simulation profile is used as display profile with tone curve set to “Unchanged” (i.e. do not require selecting “” under settings to allow verifying the native device response against a selected simulation profile).
Enhancement Limit profile name length taking into account the full path of the final storage directory.
Enhancement Disable automatic output levels detection for colorimeter correction creation measurements.
Changed the “Softproof” and “Video” presets to no longer intentionally swap red and green for the fallback matrix.
UI Cosmetic Minor UI consistency changes.
Enhancement Linux: X11 root window _ICC_PROFILE_xxx atom enumeration for Xrandr now matches the Xinerama order, so that _ICC_PROFILE_xxx atoms match irrespective of which extension applications are using. This improves conformance to the ICC Profiles in X Specification and matches the respective change in ArgyllCMS 2.0.
Mac OS X (standalone application): No longer support OS X versions prior to 10.6. This streamlines and slims the application bundle and allows using more recent 3rd party dependencies which are not available for older Mac OS X releases. If you still need support for Mac OS X 10.5, use the 0install version of DisplayCAL.
Fixed:
Critical Ensure alternate forward profiler device to PCS table input curves are strictly monotonically increasing to prevent clipping resulting in peaks in the response in case of bad underlying (non-monotonic) device behavior (regression of a change in DisplayCAL 3.3.5, SVN revision r4838).
Minor Always force the first entry in PCS to device table input curves to zero when generating high resolution PCS to device tables (fixes potential unexpected non-zero RGB output for zero input to perceptual PCS to device table).
UI Cosmetic When not confirming a manual DisplayCAL update but ArgyllCMS is up to date, reflect this in the final dialog message.
Trivial ReShade 3D LUT: If ReShade 3.x default shaders are installed, write the different parts of the 3D LUT to the correct respective sub-directories and no longer write the superfluous ReShade.fx.
UI Cosmetic Linux: Prevent flickering of tab buttons on some systems when switching tabs.
Moderate Linux: The way display device enumeration was performed was not always guaranteed to give consistent results across the different available external device to profile mapping APIs, which could lead to wrong profile associations in multi-display configurations (this fix is required to match how ArgyllCMS 2.0 enumerates displays).
Minor Mac OS X (standalone application): Bundle certificate authority certificates to enable verifying server certificates (fixes not being able to automatically download updates).
Minor Windows: When creating a colorimeter correction from measurement file(s) stored in a path where one or more components(s) started with a number from 1-9 or the lowercase letter g, the operation failed and the created colorimeter correction had to be retrieved from the temporary directory manually.
Minor Profile loader (Windows): When manually disabling calibration loading via the pop-up menu, and then starting DisplayCAL (or another application detected by the profile loader) and closing it again, the profile loader would stay disabled, including the calibration loading related menu items, requiring a profile loader restart.

New in DisplayCAL 3.3.5.0 (Oct 19, 2017)

New in DisplayCAL 3.3.4.1 (Sep 14, 2017)

New in DisplayCAL 3.3.4 (Sep 11, 2017)

Added:
Verification charts for ISO 14861:2015 soft proofing evaluation.
Changed:
Enhancement More even and consistent CPU utilization on multi CPU/multi core systems during high resolution device-to-PCS table generation.
Enhancement Multi-threaded gamut view calculation.
Enhancement Use an alternate way to generate the matrix for profiles created from the small testchart for matrix profiles (may improve accuracy on very linear displays) and use an optimized tone response curve if using a single curve and the measured response is a good match to an idealized parametric or standardized tone response curve.
Enhancement Uniformity report: No longer include (meaningless) correlated/closest color temperature. Use “traffic light” visual indicators in conjunction with unambiguous pass/fail messages to allow easy at-a-glance assessment of the results, and also include contrast ratio deviation to fully conform to ISO 12646:2015 and 14861:2015. You can update old reports via “Update measurement or uniformity report…” in the “Report” sub-menu of the “Tools” menu.
Enhancement Measurement report: Use the display profile whitepoint as reference white for the measured vs. profile white delta E calculation and use the assumed target whitepoint as reference white for the measured vs. assumed white delta E calculation to make the reported delta E more meaningful.
Enhancement Measurement report: Allow to use the display profile whitepoint as reference white when using absolute (not D50 adapted) values.
Enhancement Profile installation (Linux): Always do fallback colord profile installation using colormgr if available unless the ARGYLL_USE_COLORD environment variable is set.
Enhancement Profile loader (Linux): Include the profile source (colord or Argyll’s UCMM) in diagnostic output and use the XrandR device ID as fallback when no EDID is available.
Enhancement Profile loader (Windows): Slightly improve encoding accuracy of quantizing to 8 < n < 16 bits.
Trivial Offer the complete range of input encodings for the eeColor 3D LUT format and do not force an identical output encoding.
Trivial Do not store calibration settings in a profile if calibration is disabled.
Trivial Revert the default profile type for the 79 patches auto-optimized testchart slider step to XYZ LUT + matrix.
Trivial Iridas cube 3D LUTs: Increase compatibility by stripping leading whitespace from text lines and adding DOMAIN_MIN/MAX keywords if missing.
Trivial Measurement report: Calculate true combined a*b* range for grayscale instead of summing separate ranges.
Trivial Measurement report: Automatically enable “Use absolute values” if using full whitepoint simulation (i.e. not relative to display profile whitepoint).
Fixed:
Moderate When cancelling profiling measurements with the testchart set to “Auto”, the testchart UI and the internal test chart setting were no longer in sync until changing the profile type or restarting the application.
Moderate Synthetic ICC profile creator: Unhandled exception when trying to create DICOM (regression of a change in DisplayCAL 3.1.5, SVN revision r4020) or SMPTE 2084 profiles (regression of multiprocessing changes in DisplayCAL 3.3).
Minor Protect against potentially clipping slightly above black values during high resolution device-to-PCS table generation (regression of a change in DisplayCAL 3.3.3, SVN revision r4705).
Minor Protect against enumerating displays and ports in response to a DISPLAY_CHANGED event when the main window isn’t shown or isn’t enabled which could lead to a hang due to a race condition.
Minor Verification using a simulation profile that defines an identity matrix in its ‘chad’ tag (e.g. ISOnewspaperv4) did not work correctly due to the matrix being mapped to “None” insatead of “XYZ scaling”.
Minor Verification using a CMYK simulation profile failed with a “Profile invalid” error if previously “Use simulation profile as display profile” and “Device link profile” were enabled but no device link profile selected.
Minor Remove separate videoLUT access support under Windows and Mac OS X (separate videoLUT access is only supported under X11).
Minor Downloaded files were not renamed from their temporary name if the server did not return a Content-Length header (this typically only happens for text files, not binary files). Fixes not being able to import colorimeter corrections from iColor Display.
Trivial Do not reflect the black point hue in tone response curves of single curve + matrix profiles when not using black point compensation.
Trivial Measurement report: Additional stats median calculation index was off by n+1.
Cosmetic Display model name and manufacturer description tags were missing from profiles created using the alternate forward profiler.
Cosmetic Measurement report: Eliminate “Use absolute values” having a side-effect on the RGB patches preview.
Cosmetic Windows: When closing some of the standalone tools when minimized, e.g. by right-clicking the taskbar button and choosing “Close” from the menu, or by using the taskbar preview close button, the application did not close until restored from its minified state (i.e. by clicking on the taskbar button or switching to it with the task switcher).

New in DisplayCAL 3.3.3 (Aug 9, 2017)

Added in this release:
Intermediate auto-optimized testchart step with 115 patches.
Changed in this release:
UI Cosmetic Verification tab: Always show advanced tone response curve options when “Show advanced options” is enabled in the “Options” menu.
UI Trivial Verification tab: Don't reset the simulation profile tone response curve choice unless changing the simulation profile.
Enhancement Trivial When encountering an invalid peak white reading during output levels detection, advise to check if the instrument sensor is blocked.
Enhancement Visual whitepoint editor: Use whitepoint of currently selected profile (unless it's a preset or “”) instead of associated display profile.
Enhancement Blend profile black point to a*b* = 0 by default. This makes the visual appearance of black and near black response in Photoshop (which uses relative colorimetric intent with black point compensation for display by default) match the DisplayCAL perceptual table of XYZ LUT profiles (which means neutral hues gradually blend over to the display black point hue relatively close to black. The rate of this blend and black point hue correction are influenced by the respective calibration settings, which is another added benefit of this change).
Enhancement Measurement & uniformity report: Change average delta a, b, L, C, and H to be calculated from absolute values.
Enhancement Profile loader (Windows): Don't implicitly reset the video card gamma table to linear if no profile is assigned or couldn't be determined. Show an orange-red error icon in the latter case and display details in the left-click notification popup.
Cosmetic Windows: Log errors when trying to determine the active display device during profile installation.
Fixed in this release:
UI Cosmetic Verification tab: Don't accidentally enable the simulation profile tone response curve black output offset (100%) radio button when switching tabs.
Trivial Show error dialog if not able to connect to instrument for single reading.
Minor Strip the “firmware missing” message from the Spyder2 instrument name if it was not yet enabled (makes the automatic popup to enable the Spyder2 work).
Minor Prisma 3D LUT upload with 1.07 firmware.
Minor More accurately encode the black point in the colorimetric PCS to device table by explicitly clipping below black values to zero.

New in DisplayCAL 3.3.2 (Jun 30, 2017)

New in DisplayCAL 3.3.1 (Jun 10, 2017)

New in DisplayCAL 3.3.0 (May 31, 2017)

Added in this release:
Profiling engine enhancements:
Feature Better multi CPU/multi core support. Generating high resolution PCS-to-device tables is now taking more advantage of multiple (physical or logical) processors (typical 2x speedup on a i7 6700K CPU).
Enhancement Generating a simple high resolution perceptual table is now done by copying the colorimetric table and only generating new input curves. This markedly reduces the processing time needed to create the perceptual table (6x speedup on a i7 6700K CPU).
Enhancement Black point compensation now tries to maintain the whitepoint hue until closer to the black point. This makes curves + matrix profiles in the default configuration (slightly) more accurate as well as the default simple perceptual table of cLUT profiles provide a result that is closer to the colorimetric table.
Enhancement The curves tags of XYZ LUT + matrix profiles will now more closely match the device-to-PCS table response (improves grayscale accuracy of the curves tags and profile generation speed slightly).
Enhancement The curves tags of matrix profiles are further optimized for improved grayscale accuracy (possibly slightly reduced overall accuracy if a display device is not very linear).
Enhancement XYZ LUT profiles created from small patch sets (79 and 175 patches) with regularly spaced grids (3x3x3+49 and 5x5x5+49) now have improved accuracy due to an alternate forward profiling method that works better for very sparsely sampled data. Most presets now use 5x5x5+49 grid-based patch sets by default that provide a reduction in measurement time at about the same or in some cases even slightly better accuracy than the previously used small patch sets.
Enhancement Additional PCS candidate based on the actual measured primaries of the display device for generating high resolution PCS-to-device tables. This may further reduce PCS-to-device table generation time in some cases and lead to better utilization of the available cLUT grid points.
Feature Calibration whitepoint targets other than “As measured” will now also be used as 3D LUT whitepoint target, allowing the use of the visual whitepoint editor to set a custom whitepoint target for 3D LUTs.
Feature Automatically offer to change the 3D LUT rendering intent to relative colorimetric when setting the calibration whitepoint to “As measured”.
Feature Support for madVR's ability to send HDR metadata to the display via nVidia or Windows 10 APIs (i.e. switch a HDR capable display to HDR mode) when creating SMPTE 2084 3D LUTs. Note that you need to have profiled the display in HDR mode as well (currently only possible by manually enabling a display's HDR mode).
Feature Output levels selection as advanced option and automatic output levels detection. Note that this cannot detect if you're driving a display that expects full range (0..255) in limited range (16..235), but it can detect if you're driving a display that expects limited range in full range and will adjust the output levels accordingly.
Feature New experimental profiling patch sequence advanced options. “Minimize display response delay” is the ArgyllCMS default (same as in previous versions of DisplayCAL). “Maximize lightness difference”, “Maximize luma difference”, “Maximize RGB difference” and “Vary RGB difference” are alternate choices which are aimed at potentially dealing better with displays employing ASBL (automatic static brightness limiting) leading to distorted measurements, and should be used together with display white level drift compensation.
Feature Optional alternate method for creating colorimeter correction matrices that minimizes xy chromaticity difference (four color matrix method).
Feature The curve viewer and profile information now have the ability to plot tone response curves of RGB device link profiles.
Feature The white and black level calibration target can now be set by measurement.
Enhancement The visual whitepoint editor is now compatible with Chromecast, Web @ localhost, madVR, Prisma and Resolve pattern generators.
Enhancement 3D LUT generator ReShade 3.0 compatibility.
Feature Support calibration from WCS profiles embedded in ICC profiles (like the ones created by the Windows Display Color Calibration Tool).
Feature Profile loader (Windows): Detect the Windows Display Color Calibration Tool.
Feature Profile loader (Windows): The quantization bitdepth can now be selected.
Changed in this release:
Enhancement The visual whitepoint editor now uses the calibration of the currently active display profile as the initial whitepoint.
Enhancement Temporary files will no longer be removed if moving the files to the final location failed, and a non-empty temporary directory will no longer be removed on exit.
Enhancement Incomplete runs are now always saved to a folder named 'incomplete' in the parent directory of the 'storage' directory (previously when creating a profile from existing measurement data, a failed run could overwrite existing files in a source folder that did not reside in the 'storage' directory).
Enhancement Use a different (numbered) logfile name when starting additional instances of the standalone tools.
Enhancement When creating colorimeter correction matrices from existing spectral reference data, use the selected observer.
UI Hide the observer selector in the colorimeter correction creation dialog when creating a spectral colorimeter correction as observer isn't applicable in that case.
UI Remove the single “Browse...” button from the colorimeter correction creation dialog and add individual file pickers for reference and colorimeter measurement data files.
UI When creating colorimeter corrections for “virtual” display devices like madVR or Resolve, offer to specify the actual display model and manufacturer.
UI Use smaller increments when paging up/down the black point rate or testchart patches amount sliders.
Cosmetic Default whitepoint color temperature and chromaticity to 6500K and D65 respectively.
Cosmetic If you explicitly pause measurements prior to attempting to cancel them, and then dismiss the confirmation dialog, the measurements will no longer automatically resume (unpause) anymore.
Enhancement Linux: When installing instrument udev rules, backup existing rules to a timestamped backup directory ~/.local/share/DisplayCAL/backup/YYYYMMDDTHHMMSS instead of overwriting existing backups in ~/.local/share/DisplayCAL/backup, and automatically add the current user to the 'colord' group (which will be created if nonexistent) if not yet a member.
Cosmetic Mac OS X: Don't include ID in profile header (stops ColorSync utility from complaining).
Enhancement Profile loader (Windows): The selected calibration state will not be implicitly (re-)applied every three seconds, but only if a change in the running processes or video card gamma tables is detected. This has been reported to stop hitching on some systems using Intel integrated graphics, and works around an issue with the Windows 10 Creators Update and fullscreen applications (e.g. games) where the calibration state would not be restored automatically when returning to the desktop.
Enhancement Profile loader (Windows): The profile loader will check whether or not madVR resets the videoLUT and preserve calibration state if not.
UI Cosmetic Profile loader (Windows): Renamed “Preserve calibration state” menu item to “Load calibration on login & preserve calibration state” to reduce ambiguity.
UI Cosmetic Profile loader (Windows): The tray icon will animate when calibration is reloaded.
UI Cosmetic Windows 7 and newer: Show progress in the taskbar.
Fixed in this release:
Minor Prevent ArgyllCMS from removing measurements with one or two zero CIE components by fudging them to be non-zero.
Minor In some cases the high resolution colorimetric PCS-to-device table of XYZ LUT profiles would clip slightly more near black than expected.
Trivial Save and restore SMPTE 2084 content colorspace 3D LUT settings with profile.
UI Minor Changing the application language for the second time in the same session when a progress dialog had been shown at any point before changing the language for the first time, resulted in an unhandled exception. This error had the follow-up effect of preventing any standalone tools to be notified of the second language change.
UI Trivial The “Install Argyll instrument drivers” menu item in the “Tools” menu is now always enabled (previously, you would need to select the location of the ArgyllCMS executables first, which was counter-intuitive as the driver installer is separate since DisplayCAL 3.1.7).
UI Cosmetic When showing the main window (e.g. after measurements), the progress dialog (if present) could become overlapped by the main window instead of staying in front of it. Clicking on the progress dialog would not bring it back into the foreground.
UI Minor 3D LUT tab: When selecting a source colorspace with a custom gamma tone response curve, the gamma controls should be shown regardless of whether advanced options are enabled or not.
Trivial Testchart editor: Pasting values did not enable the “Save” button.
UI Minor Untethered measurement window: The “Measure” button visual state is now correctly updated when cancelling a confirmation to abort automatic measurements.
Minor Windows: Suppress errors related to WMI (note that this will prevent getting the display name from EDID and individual ArgyllCMS instrument driver installation).
UI Cosmetic Profile loader (Windows): Changing the scaling in Windows display settings would prevent further profile loader tray icon updates (this did not affect functionality).
Minor Profile loader (Windows): Undefined variable if launched without an active display (i.e. if launched under a user account that is currently not the active session).
Minor Profile loader (Windows): Original profile loader instance did not close after elevation if the current user is not an administrator.

New in DisplayCAL 3.2.4 (Feb 20, 2017)

New in DisplayCAL 3.2.3 (Jan 5, 2017)

New in DisplayCAL 3.2.2 (Dec 17, 2016)

New in DisplayCAL 3.2 (Nov 19, 2016)

ADDED IN THIS RELEASE:
Visual whitepoint editor. This allows visually adjusting the whitepoint on display devices that lack hardware controls as well as match several displays to one another (or a reference). To use it, set the whitepoint to “Chromaticity” on the “Calibration” tab and click the visual whitepoint editor button (you can open as many visual whitepoint editors simultaneously as you like, so that e.g. one can be left unchanged as reference, while the other can be adjusted to match said reference). The editor window can be put into a distraction-free fullscreen mode by maximizing it (press ESC to leave fullscreen again). Adjust the whitepoint using the controls on the editor tool pane until you have achieved a visual match. Then, place your instrument on the measurement area and click “Measure”. The measured whitepoint will be set as calibration target.
Another “Auto” testchart slider step with 154 patches (equal to small testchart for LUT profiles) for XYZ LUT + matrix profile type.
CHANGED IN THIS RELEASE:
Changed default curves + matrix profile testchart as well as first “Auto” testchart slider step back to pre-3.1.7 chart with 73 patches.
Better curves + matrix profiles as well as faster computation of XYZ LUT + matrix profiles. The matrix and shaper curves of gamma + matrix, curves + matrix as well as XYZ LUT + matrix profiles are now generated in separate steps which improves the shape and grayscale neutrality of the curves on less well-behaved displays. XYZ LUT + matrix profiles will compute faster, because the curves and matrix are created from a sub-set of the profiling patches, and take around the same time as XYZ LUT + swapped matrix profiles, resulting in a typical overall computation speed increase of around +33% (+100% if just looking at the time needed when not creating PCS-to-device tables) for a XYZ LUT + matrix profile computed from 1148 patches. XYZ LUT + matrix profiles computed from more patches should see a larger computation speed increase of up to +100% depending on patch count.
Resolve pattern generator and non-native madVR network implementation: Determine the computer's local network IP address in a way that is hopefully more reliable across platforms.
Profile loader (Windows): Detect and work-around buggy Intel video drivers which, despite reverting to linear gamma tables at certain points (e.g. UAC prompts), will effectively ignore attempts to restore the gamma table calibration if it is considered to be already loaded by the driver.
Menu overhaul. Menus are now better organized using categorized sub-menus and some menu items have been moved to more appropriate locations:
The “Options” menu no longer contains any functionality besides actual options. Advanced options have been moved to a sub-menu.
Profile creation from existing measurement files or EDID, profile installation as well as profile upload (sharing) functionality can now be found in the “File” menu.
Most functionality available in the “Tools” menu has been grouped into categorized sub-menus, with some of the less-used functionality now available under a separate “Advanced” sub-menu.
Measuring the selected testchart, enhancing the effective resolution of a colorimetric PCS-to-device table, loading calibration and resetting the video card gamma tables, detecting displays & instruments, as well as user-initiated spectrometer self-calibration functionality has been moved to the “Tools” menu and respective sub-menus where applicable.
FIXED IN THIS RELEASE:
Spectrometer self-calibration using an i1 Pro or i1 Pro 2 with Argyll >= 1.9 always presented the emissive dark calibration dialog irrespective of measurement mode (but still correctly did a reflective calibration if the measurement mode was one of the high resolution spectrum modes).
User-initiated spectrometer self-calibration was not performed if “Allow skipping of spectrometer self-calibration” was enabled in the “Options” menu and the most recent self-calibration was still fresh.
Cosmetic: If an update check, colorimeter correction query or profile sharing upload returned a HTTP status code equal to or greater than 400 (server-side error), an unhandled exception was raised instead of presenting a nicer, formatted error dialog (regression of DisplayCAL 3.1.7 instrument driver installer download related changes).
Resolve pattern generator: Unhandled exception if the system hostname could not be resolved to an IP address.

New in DisplayCAL 3.1.7 (Oct 5, 2016)

Added:
3D LUT sizes 5x5x5 and 9x9x9.
JETI spectraval 1511/1501 support (requires Argyll CMS >= 1.9).
Profile loader (Windows): User-definable exceptions.
Profile loader (Windows): Added reset-vcgt scripting command (equivalent to selecting “Reset video card gamma table” from the popup menu).
Changed:
“Auto” resolution of PCS-to-device tables is now limited to 45x45x45 to prevent excessive processing times with profiles from “funky” measurements (i.e. due to bad/inaccurate instrument).
Automatically optimized testcharts now use curves + matrix profiles for preconditioning to prevent a possible hang while creating the preconditioned testchart with LUT-type profiles from sufficiently “badly behaved” displays.
2nd auto-optimized testchart slider step now defaults to XYZ LUT profile type as well, and the previous patch count was increased from 97 to 271 (necessary for baseline LUT profile accuracy).
Adjusted curves + matrix testcharts to only include fully saturated RGB and grayscale to prevent tinted neutrals and/or “rollercoaster” curves on not-so-well behaved displays (also reduces testchart patch count and measurement time, but may worsen the resulting profile's overall accuracy).
Removed near-black and near-white 1% grayscale increments from “video” verification charts.
Use a 20 second timeout for unresponsive downloads.
Windows: Much easier Argyll CMS instrument driver installation (for instruments that require it). No need to disable driver signature enforcement under Windows 8/10 anymore. Select “Install Argyll CMS instrument drivers...” from the “Tools” menu, click “Download & install”, wait briefly for the download to finish (400 KB), confirm the User Access Control popup, done. Note that the driver installer executable is currently not digitally signed (obtaining a suitable certificate from a trusted authority is in progress), but the driver itself is signed as usual. The installer is based on libwdi.
Profile loader (Windows): Changed apply-profiles scripting command to behave excatly like selecting “Load calibration from current display device profile(s)” from the popup menu, i.e. not only load calibration, but also change the setting.
Profile loader (Windows): Also count calibration state being (re)applied when the profile loader state or profile association(s) changes.
Fixed:
Update measurement modes after importing colorimeter corrections. Fixes additional measurement modes for the Spyder4/5 not appearing until the program is restarted or a different instrument is selected first.
Trivial: Instrument setup was unnecessarily being called twice after downloading Argyll CMS when the latter wasn't previously detected.
Mac OS X: Work around a wxPython bug which prevents launching the application from a path containing non-ASCII characters.
Mac OS X: Work around a configuration problem affecting Argyll CMS 1.9 and 1.9.1 (fixes Spyder2 firmware, additional Spyder4/5 measurement modes, and imported colorimeter corrections not being seen by DisplayCAL if imported via Argyll CMS 1.9 or 1.9.1).

New in DisplayCAL 3.1.6 (Aug 28, 2016)

Added in this release:
HDR/SMPTE 2084: Advanced options to specify maximum content light level for roll-off (use with care!) as well as content colorspace (affects perceptual intent gamut mapping, less so colorimetric).
Changed in this release:
Increased timeout to launch Argyll CMS tools to 20 seconds.
Show failed items when otherwise successfully importing colorimeter corrections, and detect updated CCSS files.
HDR/SMPTE 2084: Improve overall saturation preservation.
Linux/colord: When checking for a valid colord device ID, also try with manufacturer omitted.
Windows Vista and later: Use “known folders” API to determine path to “Downloads” directory.
Fixed in this release:
HDR/SMPTE 2084: Slightly too light near-black tones when black output offset was set to below 100%.
Synthetic ICC Profile Creator: Undefined variable when creating synthetic profile with custom gamma or BT.1886 and non-zero black level (regression of HDR-related changes made in 3.1.5).
When loading settings from a profile created with DisplayCAL prior to 3.1.5 and custom 3D LUT tone curve gamma in DisplayCAL 3.1.5, the gamma and output offset controls wouldn't be shown if advanced options weren't enabled until re-selecting the tone curve choice.
Cosmetic (Windows 10): Banner would go blank under some Windows 10 configurations when showing the profile or 3D LUT installation dialog.
Cosmetic (Linux): Missing backgrounds and wrongly sized combo boxes when wxGTK is built against GTK3.
Linux: Profile loader autostart entry was installed under wrong (mixed-case) name if installing for the current user, which lead to the loader unnecesarily being run twice if DisplayCAL was installed from a RPM or DEB package. The superfluous loader entry will be automatically removed the next time you install a profile, or you can remove it manually by running rm ~/.config/autostart/z-DisplayCAL-apply-profiles.desktop in a terminal.
Linux/colord: Don't cache device IDs that are not the result of a successful query.
Windows: Make elevated subprocess calls synchronous. Fixes importing colorimeter corrections system-wide not listing all succesfully imported items on

New in DisplayCAL 3.1.5 (Aug 3, 2016)

New in DisplayCAL 3.1.4 (Jul 11, 2016)

Added:
A fourth Rec. 709 encompassing color space variant as a profile connection space candidate for XYZ LUT profiles. May lead to better utilization of PCS-to-device color lookup table grid points in some cases (and thus potentially smaller profiles when the effective resolution is set to the default of “Auto”).
An option to include legacy serial ports (if any) in detected instruments.
SMPTE 2084 (HDR) as 3D LUT tone curve choice.
Changed:
Don't preserve shaper curves in ICC device link profiles if selected as 3D LUT output format (effectively matching other 3D LUT formats).
Removed “Prepress” preset due to large overlap with “Softproof”.
Changed “Softproof” preset to use 5800K whitepoint target (in line with Fogra softproof handbook typical photography workflow suggested starting point value) and automatic black point hue correction.
Synthetic ICC profile creator: Changed SMPTE 2084 to always clip (optionally with roll-off) if peak white is below 10000 cd/m².
Synthetic ICC profile creator: Changed transition to specified black point of generated profiles to be consistent with BT.1886 black point blending (less gradual transition, blend over to specified black point considerably closer to black).
Profile loader (Windows): If no profile assigned, load implicit linear calibration.
Fixed:
When loading settings from an existing profile, some CIECAM02 advanced profiling options were not recognized correctly.
Don't accidentally remove the current display profile if Argyll CMS is older than version 1.1 or the Argyll CMS version is not included in the first line of output due to interference with QuickKeys under Mac OS X.
Make sure the Argyll CMS version is detected even if it isn't contained in the first line of output (fixes Argyll CMS version not being detected if QuickKeys Input Manager is installed under Mac OS X).
When loading settings, add 3D LUT input profile to selector if not yet present.
Curve viewer/profile information: Fix potential division by zero error when graphing unusual curves (e.g. non-monotonic or with very harsh bends).
Profile information: Reset right pane row background color on each profile load (fixes “named color” profile color swatches sticking even after loading a different profile).

New in DisplayCAL 3.0.5.0 (Dec 16, 2015)

New in DisplayCAL 3.0.4.3 (Dec 16, 2015)

New in DisplayCAL 3.0.4.2 (Dec 16, 2015)

New in DisplayCAL 3.0.4.1 (Dec 16, 2015)

New in DisplayCAL 3.0.4.0 (Aug 10, 2015)

New in DisplayCAL 3.0.2.0 (Jun 12, 2015)

New in DisplayCAL 3.0.1.0 (Jun 1, 2015)

Added in this release:
madTPG network interface cross-platform support. This means you can now connect from Linux or Mac OS X to madTPG running under Windows.
Functionality to change display profile (and calibration) whitepoint of existing profiles without re-measuring (no UI, only available via the command line). This is more or less a gimmick and should not be used if colorimetric accuracy is important, but should result in a more precise white point change than using (for example) f.lux or redshift because it fully takes into account the profile colorimetry, although white point shifting in real time is not supported.
Option to enable/disable startup sound.
Additional verification testcharts (roughly 750 and 1000 patches in size).
Output number placeholder for use in the profile name (as another means to disinguish equal display models).
Changed in this release:
Force planckian locus in measurement reports if color temperature is >= 1667 and < 4000.
Improve “enhance effective resolution of PCS-to-device tables” slightly: Move CAM Jab clipping blending region from 50%..100% to 33%..75% in the cLUT grid. This improves inverse profile self check errors very slightly and in some cases visually further improves gamut mapping smoothness in the blue region for gamuts that are really limited there (e.g. Laptops/Notebooks, cheap TN panels).
Fixed in this release:
Uniformity measurements not working with spectrometer if instrument self-calibration is performed during the measurements.
Work-around Python 2.7 configuration file parsing bug if configuration file gets corrupted (e.g. through hard disk issues, destructive edits or similar).
When installing a profile, always copy it to a temporary directory first so if accidentally installing a profile from the location where it's already installed (e.g. system32\spool\drivers\color) it doesn't get nuked by dispwin.
Cosmetic: Fix “ProgressDialog object has no attribute 'remaining_time'” when the fancy progress dialog is disabled under “Options” and using the testchart editor to create a testchart.
Chromecast messing with display enumeration under Linux and Mac OS X.
If missing, add DISPLAY_TYPE_BASE_ID to colorimeter correction matrix (CCMX) files when reading (fixes “Instrument access failed” when using Argyll CMS 1.7 with older CCMX files).
When creating a synthetic ICC profile with Rec. 1886 tone response curve and a black level of zero, the fallback gamma value of 2.2 was used instead of the configured gamma of 2.4.

New in DisplayCAL 3.0.0.0 (May 4, 2015)

Added in this release:
Tabbed user interface. See screenshots.
Full support for Argyll CMS 1.7.0, which includes support for the ColorHug2, K-10A, Spyder5, the capability to use a Google Chromecast as pattern generator, and more. Note that the accuracy of using a ChromeCast is limited due to the internal RGB to YCbCr conversion and upscaling in the device.
Optional automatic testchart optimization as part of the characterization process.
madTPG launches automatically when used (requires madVR 0.87.12 or later).
Optionally create a 3D LUT automatically after profiling. 3D LUT settings are stored in the profile and synced with measurement report settings when loaded.
1-click install of madVR 3D LUTs after generation (requires madVR 0.87.12 or later).
3D LUT maker: Optionally allow to use PCS-to-device instead of inverse device-to-PCS gamut mapping. This allows for fast creation of 3D LUTs, but the result is dependent on the quality and accuracy of the profile's B2A tables.
3D LUT maker/measurement report: Added an option to just apply black output offset to the tone response curve instead of overriding it completely. This option is only available for source profiles that have a tone response curve which is not defined by a simple power function (e.g. sRGB). Also added a warning message if input values would be clipped when using the tone response curve unmodified.
Show reference versus corrected colorimeter measurements along with delta E when creating a colorimeter correction matrix.
Optionally clip WTW on input when creating a 3D LUT (requires Argyll CMS 1.7 or later).
Additional error checking for patterngenerator network interface: Check if each Argyll test pattern update is followed by a network send. Fail with a sync error otherwise.
Easily create a compressed archive of the currently selected profile and related files with the click of a button next to the “Settings” dropdown.
Testchart editor:
Support loading of CGATS files which do not contain XYZ values.
CSV import (drag and drop a CSV file) and export.
Export 16-bit PNG and TIFF or 10-bit DPX files.
Improved speed of image file export.
Dragging and dropping image files extracts and adds reference patches if a preconditioning profile is set.
Changed in this release:
Generate XYZ LUT profiles by default and for all presets. Consequently, black point compensation now defaults to off and is an advanced option (not shown by default).
XYZ LUT + matrix profiles will always have black point compensated matrix TRC tags. That way “dumb” applications which fall back to the matrix won't clip shadow detail if they don't support BPC internally, while “smart” applications can use the accurate LUTs.
When creating XYZ LUT profiles with enhanced effective PCS-to-device table resolution, improve reproduction of saturated colors for displays with limited gamut (e.g. smaller than sRGB), increasing visible detail and saturation in those areas. This should typically affect saturated blues the most. Users of displays that cover most of sRGB except parts of the blue region may see an improvement as well. Also, more accurately encode the PCS-to-device black point.
Show display technology type of spectral colorimeter corrections and sort by the shown name instead of the filename.
Moved display update delay and settle time controls to main window (“Show advanced options” must be enabled).
Force a minimum display update delay of 600 ms for Resolve irrespective of chosen preset.
Don't unload current settings file when changing calibration tone curve to “As measured”.
When creating a profile, automatically filter out XYZ = 0 readings if the RGB stimulus is < 5% (except black).
Files generated during incomplete/failed runs are moved to a different location than the storage directory. See “User data and configuration file locations”, “Incomplete/failed runs”. Compare the list of files in the temporary directory and their modification times before and after running Argyll CMS tools to determine if files should be kept in case of errors.
When updating via Zero Install, force exact version.
3D LUT: Default to 65x65x65 cube for all 3D LUT formats except Pandora (.mga) which only supports 17x17x17 and 33x33x33.
3D LUT: Default to 16..235 TV level encoding for the eeColor.
Measurement report: Changed displayed range of Y to be always 0..100 with four decimal digits.
Linux, Windows: On application startup, the current video LUT is restored after checking video LUT access. This differs from the previous behavior where the video LUT was reset to the calibration (if present) of the currently assigned display profile(s) (if any).
Fixed in this release:
Error message when trying to quit the application while the “About” dialog was shown (regression of a change in 2.6 how lingering dialogs are handled on application exit).
Using Resolve as pattern generator prevented ambient measurements.
Fixed bug with Resolve interface related to APL that resulted in pattern updates being rejected by Resolve due to negative background RGB. This could happen with bright patches if the test patch size was above roughly 30% and below 100% screen area.
Due to file descriptors for session logfiles not being closed after being done with the file, dispcalGUI could run out of available file descriptors when used to create or inspect a large amount of profiles in a single session.
Disabled rollover for session logfiles.
Worked around uninitialized variables with Argyll's xicclu utility in versions 1.6.x to prevent unexpected color lookup output values.
Make sure the 1% reading during calibration check measurements doesn't trigger continuing to the following step.
Clicking the “Pause” button on the progress dialog in the first few seconds before instrument initialization was complete would not pause measurements, and disabled the button until clicking “Cancel”.
Verifying a device link created with an encoding other than full range RGB.
Curve viewer: Amount of tone values and grayscale % for calibration curves was not calculated correctly if the number of entries was not 256.
Testchart editor: Deleting a selection of non-consecutive rows didn't work correctly.

New in DisplayCAL 2.6.0.0 (Nov 19, 2014)

Added in this release:
Scripting support (locally and over the network).
Possibilty to do spectrometer self-calibration on its own (look in the “Options” menu). Useful in conjunction with “Allow to skip spectrometer self-calibration”.
Curve viewer, profile information: Support plotting tone response curve of grayscale profiles.
wxPython 3.0.2 “Phoenix” compatibility.
Linux: Install/uninstall instrument configuration files (udev rules/hotplug scripts) from the “Tools” menu.
Changed in this release:
Use extended testchart as default for matrix profiles.
When switching profiles or displays, make sure the measurement report and 3D LUT creation windows are updated accordingly if shown.
Unset Argyll display update delay/settle time environment variables after disabling their override when they were not set initially.
All standalone tools have separate configuration files (overridden by main configuration if newer and vice versa) and logfiles.
VRML to X3D converter can now do batch processing.
Enhanced UI for colorimeter correction creation.
Limit the ability to create colorimeter corrections for the Klein K-10 to factory measurement mode.
Detect instruments at startup if no instruments were previously configured.
Changed “Resolve” preset to use a minimum display update delay of 600 ms and constant APL patterns by default.
Restore defaults for display update delay and settle time multiplier when loading settings without override.
Linux: The system-wide configuration file is ignored except for the profile loader.
Fixed in this release:
Calibration curve plot was not working anymore for profiles with formula-type vcgt tags (regression of r2384, did not affect Argyll-generated profiles).
Re-use existing Resolve connection if possible and only shut it down on application exit (fixes “Address already in use” error under Linux and Mac OS X).
When using Resolve, the measurement window position and size aswell as the “Use black background” setting were not correctly stored in the generated calibration file and/or profile and could thus not be restored by loading the file(s).
When exporting test patches as image files, limit pixel dimensions to FullHD (fixes memory error when exporting fullscreen patches).
When applying a tone response curve to an existing profile, make sure curve values can't become negative at and near zero input.
Fix generation of synthetic grayscale profiles.
Linux (only if Argyll CMS was installed via Zero Install)/Mac OS X/Windows: If the Argyll CMS directory was not explicitly configured, Argyll CMS reference profiles (e.g. Rec709.icm) were not added automatically to file dropdown lists and the “Install Argyll CMS instrument drivers...” menu item (Windows only) was grayed out (this impacted convenience, not functionality).
Cosmetic, Mac OS X 10.8 and earlier: Splash screen had a light gray border instead of being semi-transparent.
Mac OS X 10.10 Yosemite: Disable functionality to load/clear calibration like under Mac OS X 10.6 and up.

New in DisplayCAL 2.5.0.10 Beta (Nov 14, 2014)

Added in this release:
Support for the in-development ColorHug 2 (requires Argyll CMS 1.7 beta development code 2014-10-29 or newer).
Scripting support (locally and over the network).
Possibilty to do spectrometer self-calibration on its own (look in the “Options” menu). Useful in conjunction with “Allow to skip spectrometer self-calibration”.
Curve viewer, profile information: Support plotting tone response curve of grayscale profiles.
xPython 3.0.2 “Phoenix” compatibility.
Changed in this release:
Use extended testchart as default for matrix profiles.
When switching profiles or displays, make sure the measurement report and 3D LUT creation windows are updated accordingly if shown.
Unset Argyll display update delay/settle time environment variables after disabling their override when they were not set initially.
All standalone tools have separate configuration files (overridden by main configuration if newer and vice versa) and logfiles.
VRML to X3D converter can now do batch processing.
Enhanced UI for colorimeter correction creation.
Limit the ability to create colorimeter corrections for the Klein K-10 to factory measurement mode.
etect instruments at startup if no instruments were previously configured.
Changed “Resolve” preset to use a minimum display update delay of 600 ms and constant APL patterns by default.
Restore defaults for display update delay and settle time multiplier when loading settings without override.
Fixed in this release:
Calibration curve plot was not working anymore for profiles with formula-type vcgt tags (regression of r2384, did not affect Argyll-generated profiles).
Re-use existing Resolve connection if possible and only shut it down on application exit (fixes “Address already in use” error under Linux and Mac OS X).
When using Resolve, the measurement window position and size aswell as the “Use black background” setting were not correctly stored in the generated calibration file and/or profile and could thus not be restored by loading the file(s).
When exporting test patches as image files, limit pixel dimensions to FullHD (fixes memory error when exporting fullscreen patches).
When applying a tone response curve to an existing profile, make sure curve values can't become negative at and near zero input.
Fix generation of synthetic grayscale profiles.
Mac OS X 10.10 Yosemite: Disable functionality to load/clear calibration like under Mac OS X 10.6 and newer.

New in DisplayCAL 2.5.0.9 Beta (Nov 6, 2014)

Added in this release:
Scripting support (locally and over the network).
Possibilty to do spectrometer self-calibration on its own (look in the “Options” menu). Useful in conjunction with “Allow to skip spectrometer self-calibration”.
Curve viewer, profile information: Support plotting tone response curve of grayscale profiles.
wxPython 3.0.2 “Phoenix” compatibility.
Linux: Install/uninstall instrument configuration files (udev rules/hotplug scripts) from the “Tools” menu.
Changed in this release:
Use extended testchart as default for matrix profiles.
When switching profiles or displays, make sure the measurement report and 3D LUT creation windows are updated accordingly if shown.
Unset Argyll display update delay/settle time environment variables after disabling their override when they were not set initially.
All standalone tools have separate configuration files (overridden by main configuration if newer and vice versa) and logfiles.
VRML to X3D converter can now do batch processing.
Enhanced UI for colorimeter correction creation.
Limit the ability to create colorimeter corrections for the Klein K-10 to factory measurement mode.
Detect instruments at startup if no instruments were previously configured.
Changed “Resolve” preset to use a minimum display update delay of 600 ms and constant APL patterns by default.
Restore defaults for display update delay and settle time multiplier when loading settings without override.
Linux: The system-wide configuration file is ignored except for the profile loader.
Fixed in this release:
Calibration curve plot was not working anymore for profiles with formula-type vcgt tags (regression of r2384, did not affect Argyll-generated profiles).
Re-use existing Resolve connection if possible and only shut it down on application exit (fixes “Address already in use” error under Linux and Mac OS X).
When using Resolve, the measurement window position and size aswell as the “Use black background” setting were not correctly stored in the generated calibration file and/or profile and could thus not be restored by loading the file(s).
When exporting test patches as image files, limit pixel dimensions to FullHD (fixes memory error when exporting fullscreen patches).
When applying a tone response curve to an existing profile, make sure curve values can't become negative at and near zero input.
Fix generation of synthetic grayscale profiles.
Linux (only if Argyll CMS was installed via Zero Install)/Mac OS X/Windows: If the Argyll CMS directory was not explicitly configured, Argyll CMS reference profiles (e.g. Rec709.icm) were not added automatically to file dropdown lists and the “Install Argyll CMS instrument drivers...” menu item (Windows only) was grayed out (this impacted convenience, not functionality).
Cosmetic, Mac OS X 10.8 and earlier: Splash screen had a light gray border instead of being semi-transparent.
Mac OS X 10.10 Yosemite: Disable functionality to load/clear calibration like under Mac OS X 10.6 and newer.

New in DisplayCAL 2.5.0.0 (Sep 8, 2014)

Added in this release:
Argyll CMS 1.7 beta compatibility: Klein K10-A support (requires Argyll CMS 1.7 beta test 2014-05-21 or newer) and updated technology strings for colorimeter correction creation. When creating 3D LUTs with Rec. 1886 or custom tone response curve, force RGB source 0 0 0 to map to RGB destination 0 0 0 (requires Argyll CMS 1.7 beta development code 2014-07-10 or newer).
Enable black output offset instead of all-input offset for 3D LUTs, measurement report and synthetic profile creation (based on Argyll CMS 1.7 beta development code 2014-07-12, thanks to Graeme Gill). Note that for 3D LUTs, if using output offset ideally Argyll CMS 1.7 should be used aswell once it becomes available since the current implementation in dispcalGUI that enables output offset when used with Argyll CMS 1.6.3 or older has limited 16-bit precision for the black point mapping (due to the implementation altering the source profile TRC on-the-fly in that case, and the ICCv2 16-bit encoding used for the TRC tags in the source profile), while Argyll CMS 1.7 will enable full floating point processing (due to the black point mapping then taking place internally in collink, and dispcalGUI not having to alter the source profile TRC beforehand).
Black point can be specified in XYZ or chromaticity coordinates when creating a synthetic ICC profile.
When dropping an existing profile onto the synthetic ICC profile creation window, set whitepoint, primaries, blackpoint and tone response curve (average) according to the profile.
Support for the Resolve 10.1 (and newer) CM pattern generator. See also 3D LUT creation workflow for Resolve on the dispcalGUI Wiki.
Enable interactive display adjustment without creating calibration curves by setting “Tone curve” to “As measured”. This also causes all calibration setting placeholders in the profile name to be ignored.
Added options to override the minimum display update delay (requires Argyll CMS 1.5 or newer) and display settle time multiplier (requires Argyll CMS 1.7 Beta or newer). These options can be found in the “Set additional commandline arguments...” window accessible from the “Options” menu. Note that these two settings (unlike the additional commandline parameters) are stored in the profile, and will be restored when the profile is selected again under “Settings”.
Testchart editor: If generating any number of iterative patches as well as single channel, gray or multidimensional patches, it is possible to add the single channel, gray and multidimensional patches in a separate step by holding the shift key while clicking on “Create testchart”. This prevents those patches affecting the iterative patch distribution, with the drawback of making the patch distribution less even. This is an experimental feature.
Windows: Simplified Argyll CMS instrument driver installation by adding a respective menu item to the “Tools” menu.
Changed in this release:
Visual overhaul.
Calibration curves are no longer automatically loaded into the video card gamma table when loading a settings file. To manually load calibration curves into the video card gamma table, choose “Load calibration curves from calibration file or profile...” in the “Options” menu (Linux and Windows only), or install a profile, or use the “Preview calibration” checkbox (Linux and Windows only) in the profile installation dialog. The previous behavior can be restored by editing dispcalGUI.ini and adding a line calibration.autoload = 1.
Split “Smooth B2A tables” into “Enhance effective resolution of colorimetric PCS-to-device table” and “Smoothing” options and moved them to advanced gamut mapping options.
Renamed “Apply BT.1886 gamma mapping” to “Apply tone response curve”.
Always override the source profile tone response curve when using “Apply tone response curve” (3D LUT creation and measurement report) so the result will be correct for the chosen parameters regardless of source profile tone response curve.
Removed black point compensation option from synthetic profile creation window.
Changing the black level or black point Y value when creating a synthetic ICC profile now rounds up or down to make it a multiple of the 16-bit encoding precision used in ICC v2 profiles (which is roughly 0.00153 when normalized to 0..100).
Re-enabled moving the standalone curve viewer between displays updating the graph according to the display it is currently on.
Always append the measurement mode to the instrument string in the measurement report.
Confirm quitting the application (via the application menu “Quit” item or the associated keyboard shortcut) if a task is still running (in practice this only affects Mac OS X as the menu is not accessible on other platforms while a task is running).
When selecting “Locate Argyll CMS executables...” in the menu to switch to a different Argyll CMS version, automatically detect if a newer version is on the search path and offer to use it right away without having to manually browse to the location.
Renamed “Gamma” entry in calibration tone response curve dropdown to “Custom” to emphasize that it is a curve with custom gamma exponent and other parameters.
When switching calibration tone response curve from Rec. 1886 to custom, restore the previous gamma and black output offset parameters (or defaults in case a preset was used).
Show an error message if trying to measure the ambient light color with an instrument which only has a monochrome ambient sensor (e.g. Spyder 3 and 4 Elite or Pro).
Importing colorimeter corrections and enabling the Spyder 2 is now truly automatic (necessary files are downloaded if not present on the local system).
Made black level control an advanced calibration option.
Loading a profile that does not contain calibration settings sets all calibration options to “As measured”.
When creating or loading a profile (except presets), it is now automatically set as the current profile in the measurement report and 3D LUT creation windows.
Enabled interactive display adjustment for the madVR and Resolve presets and altered them to not do video card gamma table calibration by default.
All presets that create LUT profiles use optimized testcharts.
When a virtual display is selected, don't offer profile installation but 3D LUT creation instead.
ReadMe: Completed testchart editor documentation.
Testchart editor: Always enable “Add saturation sweeps” and “Add reference patches...” controls when a preconditioning profile is set, regardless of selected patch distribution and adaptation.
Testchart editor: When enabling/disabling the preconditioning profile, set adaptation to 100%/10% respectively.
Testchart editor: Greatly improved the speed of inserting patches into large testcharts with thousands of patches.
Linux, profile installation: Try to install the profile using all available systems regardless if one of them fails to install the profile. Only report profile installation as failed if all available systems failed to install the profile. Report specific failures when profile installation only partly succeeds.
Linux, profile installation: Try colormgr as fallback (if available) if profile installation using Argyll 1.6+ failed.
Linux: Use the EDID MD5 to find the device ID (this only works with colord versions released after 26. Apr. 2013).
Mac OS X: No longer require administrator privileges if running from a non-administrator user account.
Windows Vista and newer: Enable system-wide profile and OEM files installation without the need to run the whole application as administrator. The UAC shield icon is shown on buttons if an action requires administrator privileges.
Fixed in this release:
The “Apply BT.1886 gamma mapping” checkbox in the 3D LUT creation window did re-enable itself when clicking on “Create 3D LUT” if Rec709.icm was selected as source profile.
Synthetic ICC profile creation: Setting gamma to absolute or relative when not using Rec. 1886 now actually makes a difference (previously the end result was always an absolute curve).
“Show actual calibration curves from video card” could not be enabled in the standalone curve viewer if the previously selected display did not allow video LUT access.
Measuring the ambient light level with an instrument which only has a monochrome ambient sensor (e.g. Spyder 3 and 4 Elite or Pro).
If loading a settings file created with automatic black point hue correction, that setting was not restored and the default value of no correction was used.
When doing a “Profile only” and using the current calibration from the video card gamma table, Argyll CMS expects 256 entries. Interpolate on-the-fly if the number of entries in the video card gamma table is not 256 (this currently only affects Mac OS X 10.9 and newer where the table contains 1024 entries).
If the display manufacturer string recorded in a profile was the same as the three-letter manufacturer ID string (e.g. NEC), the profile could not be uploaded to the openSUSE ICC Profile Taxi service due to a bogus “missing metadata” error message (regression of r1422).
Profile information window: Color coordinates in the status bar were wrong if the selected colorspace was not a*b* (bug introduced in dispcalGUI 2.0).
The specbos 1201 was not working due to not supporting measurement mode selection.
When getting normalized vcgt tag values, scaling was off if the vcgt wasn't 16-bit. This prevented e.g. the measurement report from working with certain 3rd-party display profiles.
Cosmetic: Correct padding of the patch number in the measurement report summary (fixes missing padding when multiple patches are evaluated for a single criterion).
Trivial: Tab order of controls (top-down, left-right).
Testchart editor: IndexError if trying to add saturation sweeps or reference patches when no cells are selected.
Linux, profile installation: Do not regard a missing colormgr as error.
Mac OS X: Selecting “About”, “Locate Argyll CMS executables...” (preferences) and “Quit” in the application menu does something again (this stopped working with the move to wxPython 3.0 GUI library in dispcalGUI 2.0).

New in DisplayCAL 2.1.0.0 (May 13, 2014)

Added:
“Auto” measurement mode for the ColorHug. This will automatically create a colorimeter correction with the reference based on EDID as part of the normal measurement process. This is a work-around for the red primary shift problem that some ColorHug users are experiencing (note that this will make ColorHug measurements closely match the gamut boundaries defined by the primaries and whitepoint from EDID). This mode should only be used as a last resort if no colorimeter correction with reference measurements from a spectrometer or other known accurate instrument can be obtained.
Auto-update functionality. Apply updates from within dispcalGUI under Mac OS X and Windows, or if using Zero Install.
Changed:
Improved Zero Install integration. Installation is now as simple as a standalone installation.
Switched “Smooth B2A tables” off and “Low quality B2A tables” back on for the madVR preset to save some time during profile generation.
The HTML-embedded X3D viewer will now by default try and load its components from the web, with a fallback to a locally cached copy (if available) and not anymore the other way around. This means generated HTML files will automatically use updated viewer components when an internet connection is available.
Choosing “Profile information” from the “File” menu will now always present a file dialog to pick a profile and no longer use the profile currently selected in the main window (this functionality is still available via the small blue “Info” button next to the settings dropdown).
Show profile information with right pane expanded by default.
Don't lock measurement mode for colorimeter corrections, instead set colorimeter correction to none if an incompatible measurement mode is selected.
Allow black point compensation if “low quality B2A tables” is enabled.
Windows: Limit profile name length so that the length of the path of the temporary directory plus the length of the profile name does not exceed 254 characters (which is the maximum useable length for Argyll CMS tools where an extension with a length of four characters is added automatically).
Fixed:
When using the ColorHug in “Factory” or “Raw” measurement mode in dispcalGUI (r1378 or later) with a colorimeter correction that was created with Argyll CMS 1.5 or later, the measurement mode was being locked to the wrong mode (a colorimeter correction created in “Factory” mode would lock to “Raw” and vice versa).
Transpareny rendering in the HTML-embedded X3D viewer: Transparency is now gamma-corrected.
Tone response curves plot: Removed the very slight interpolation offset error at zero input (around +0.5 RGB on a 0-255 scale for a synthetic 16-bit tone response curve following a gamma of 2.2 with no black offset) for tone response curves that have zero output at non-zero input.
Trying to open files with unicode characters in their filename or path in the standalone testchart editor, curve viewer, profile information, or VRML to X3D converter application from the commandline, via the desktop's “open with” functionality, or by assigning a supported filetype to be opened with the respective application failed (dragging and dropping the file onto the respective application window worked fine).
Correctly reflect in the GUI if black point compensation can be applied. Black point compensation is available for curves + matrix profiles and XYZLUT profiles with either “low quality B2A tables” or “smooth B2A tables” enabled.

New in DisplayCAL 2.0.0.0 (Apr 24, 2014)

New profiling option “smooth B2A tables” for XYZ LUT profiles.
3D views of profile gamuts and testcharts can be created as VRML, X3D, or X3D in HTML with embedded viewer for WebGL-enabled browsers.
VRML to X3D standalone converter. Output options are X3D (XML) and X3D in HTML. The HTML files generated by default use the X3DOM runtime to implement a viewer, which requires a WebGL-enabled browser.
Slightly adjusted presets:
Changed “madVR” and “Video” presets to use Rec. 1886 as calibration target.
Changed “Prepress” and “Softproof” presets to use full black point hue correction during calibration.
Disabled interactive display adjustment for “Laptop” preset.
Set profile type for those presets that defaulted to curves + matrix to single curve + matrix.
Changed profile black point compensation option to map the black point to zero more reliably. This means black point compensation can no longer be used for L*a*b* LUT profiles, and will only be applied to the LUT part of XYZ LUT profiles if the new “smooth B2A tables” profiling option is used.
Changed 3D LUT and measurement report settings to automatically enable/disable Rec. 1886 gamma mapping if the source profile has/doesn't have a known “camera” transfer function (e.g. SMPTE 240M or Rec. 709).
Unlocked calibration Rec. 1886 gamma controls to bring them in line with the 3D LUT and measurement report offerings.
Set BT.1886 gamma mapping defaults to gamma 2.4 absolute to match the recommendation.
Show error message in case of ambient measurement failing due to instrument communications failure.
Curve viewer: Enable dragging and zooming.
Profile information comparison profile selection, measurement report simulation profile selection: The list of automatically recognized profiles (if they are installed) has been extended to the full range of ECI offset, gravure and newsprint profiles as well as their basICColor equivalents (available on colormanagement.org) and an increased range of RGB working space profiles. Other profiles can be added by dragging-and-dropping them on the profile list.
Never center the display adjustment and untethered measurement windows on the screen, or show them at their parent window coordinates if no previous coordinates were stored in the configuration (always use default coordinates of topleft screen corner in that case).
In the case of essential resource files missing (e.g. broken installation or deleted application files), show a more informative error message.
Diagnostic 3D views of testcharts are no longer created automatically. You have to click the “3D” button.
Slightly increased the logging verbosity.
Fixed in this release:
Unhandled exception when trying to start measurements on a display that was added/enabled while dispcalGUI was already running.
In case of untethered measurements, correctly detect and react to recurring need for intermittent instrument calibration.
Re-enabled the ability to generate some 3D LUT formats from existing DeviceLink profiles.
Don't allow leading dashes in profile filename which might trick the Argyll CMS tools into mistaking parts of it as an option parameter.
Refresh display measurement mode was not correctly restored from saved settings.
Moving the measurement window between displays resulted in an error and did not update the display configuration (regression of r1737).
Mac OS X: Standalone tools (broken due to internal symlinks pointing to wrong locations).
Mac OS X: Create user profile directory if it does not exist when trying to install a profile (fixes inability to install a profile if the user profile directory does not exist).
Mac OS X 10.6 and newer: Calibration loading/clearing is now disabled due to undesirable side-effects (loading calibration from the current display profile could make it necessary to manually restore the display profile by opening system preferences → display → color and loading or clearing a calibration could have side-effects on calibration and profiling measurements).

New in DisplayCAL 1.5.2.5 (Oct 23, 2013)

ADDED IN THIS RELEASE:
Full Argyll CMS 1.6.0 support (e.g. JETI specbos 1211/1201, madVR calibration and 3D LUT generation, body centered cubic grid option for creating testcharts).
Testchart editor: Charts can be exported as PNG or TIFF files.
Testchart editor: Gamma and neutral axis emphasis controls.
Testchart editor: “Use current profile as preconditioning profile” button.
Testchart editor: Save VRML diagnostic files for testcharts without the need to re-generate the chart.
Testchart editor: Sort patches by L*, RGB, sum of RGB or sort RGB gray and white to top.
Untethered display measurement and profiling. Be sure to read the note on optimizing testcharts for untethered measurements in automatic mode.
Shortcut for the BT.1886 tone curve (previously available by setting gamma to 2.4, absolute, and black output offset to zero).
3D LUT: Enable additional intents.
3D LUT: Support eeColor and Pandora LUT formats.
3D LUT: Support Argyll CMS 1.6 video encodings and BT.1886 gamma mapping.
Windows 8 Argyll CMS driver installation instructions to the ReadMe.
Instructions how to proceed when a process cannot be started to the ReadMe.
Softproof preset (based on FOGRA recommendation).
madVR preset.
sRGB preset.
Allow specifying extra arguments for Argyll's targen command.
Computer name, EDID serial and EDID CRC32 placeholders for use in the profile name.
Synthetic profile creation facility (e.g. for use as source in 3D LUT generation).
ACES RGB and DCI P3 colorspace definitions and reference profiles.
Dry run. If enabled in the options menu, all functionality that calls Argyll CMS executables will effectively do nothing. This allows review of the used command line parameters by checking the log.
Additional session logs are saved for most operations involving the Argyll tools (i.e. directly in the folder where created files are saved to).
Show profile self check ΔE*76 info in profile installation dialog.
CHANGED IN THIS RELEASE:
Use of the new charts is highly recommended. All presets have been updated to use the new chart types. The “prepress" preset has also been updated to generate a XYZ LUT profile by default.
Detect if the instrument can use CCMX or CCSS colorimeter corrections based on the measurement mode. Disable colorimeter corrections for non-base display types.
Correctly map measurement mode to DISPLAY_TYPE_BASE_ID for all supported instruments when creating CCMX.
If a colorimeter correction with DISPLAY_TYPE_BASE_ID or DISPLAY_TYPE_REFRESH is selected, automatically set the correct measurement mode.
If measuring the colorimeter correction testchart, automatically ensure a suitable measurement mode for colorimeters (if they support more than refresh and non-refresh measurement modes).
Do not use spline interpolation for curve plots.
Updated french translation, thanks to Loïc Guégant.
Renamed calibration quality to calibration speed.
Set calibration speed for all presets to medium.
Standalone testchart editor: Parse first non-option argument as file to be opened.
Testchart editor: Always generate good optimized points rather than fast.
Testchart editor: Use existing file path when saving testchart.
Testchart editor: Greatly improved the speed of paste operations when comparatively large data sets are used.
Disallow -d and -D as extra arguments for Argyll's targen as the testchart editor only supports video RGB.
Reset adaptive measurement mode when restoring defaults.
Close all profile information windows when hiding the main window instead of just hiding them (don't reopen them when the main window is shown again).
Curve viewer: Use float formatting for input RGB display.
Only skip legacy serial ports if no instrument detected.
Also specify Argyll dispcal/dispread -y parameter for spectrometers.
Use Rec. 709 whitepoint chromaticity coordinates for “Video” preset.
Changed profile installation error message for virtual display devices.
Make it clearer which calibration is used when doing a “Profile only”: When a calibration file is going to be used, change the message from the warning “The current calibration curves will be used” to the informational “The calibration file will be used” with the usual options to embed/not embed/reset video card gamma table.
Allow the use of calibration curves when profiling a web display.
When creating a colorimeter correction from profile(s), get the instrument name from the embedded TI3 if the data source is not EDID.
Do not specify (superfluous and thus ignored) patch window positioning arguments for dispcal/dispread when using a virtual display.
3D LUT: Removed black point compensation option (no longer easily possible because it now uses Argyll's collink internally. You can still have the effect of BPC by creating a display profile with BPC enabled and using it as destination profile during 3D LUT creation).
Always copy/move temporary files to the save location if not a dry run, also in case of an error. If copy/move fails, keep them in the temporary directory and inform the user.
Disable black point compensation for the “Prepress” preset (there are three presets without bpc - “madVR”, “Prepress” and “Softproof”) and use L* as calibration tone curve.
Testchart and preset improvements:
All testcharts for LUT profiles have been complemented with additional single channel patches. This should in most cases improve average and maximum delta E of generated profiles, in some cases significantly. In fact, testing has shown that the new “small testchart for LUT profiles” with 154 patches total yields better results than the previous “extended testchart for LUT profiles” with 238 patches.
The charts for curves + matrix profiles have been improved by adding a few additional body centered cubic grid patches - all the charts which are not tuned for a certain display type are body centered cubic grid based (this was also the case previously for the LUT testcharts, but not for the matrix charts).
The patch order in the LUT charts has been optimized to improve measurement speed.
The chart for gamma + matrix profiles has been removed in favor of the updated default chart for matrix profiles.
New additional charts for LUT profiles have been added in various sizes.
For each of the new charts for LUT profiles, starting from the “very large” size, optimized farthest-point-sampled versions have been added which are pre-conditioned for several common display types: sRGB tone response with Rec. 709 primaries and D65 whitepoint (consumer-grade displays), gamma 2.2 with Rec. 709 primaries and D65 whitepoint (consumer-grade displays, TVs), gamma 2.2 with AdobeRGB primaries and D65 whitepoint (entry-level and high-end graphics displays), L* tone response with NTSC primaries and D50 whitepoint (high-end graphics displays).
The naming and patch count of the testcharts for LUT profiles has changed. The mapping that most closely resembles the old testcharts is as follows (total number of patches in parentheses):
Old “Default testchart for LUT profiles” (124) → new “Small testchart for LUT profiles” (154)
Old “Extended testchart for LUT profiles” (238) → new “Default testchart for LUT profiles” (270)
Old “Large testchart for LUT profiles” (396) → new “Extended testchart for LUT profiles” (442)
Old “Very large testchart for LUT profiles” (912) → new “Very large testchart for LUT profiles” (994)
Old “Massive testchart for LUT profiles” (2386) → new “Massive testchart for LUT profiles” (2527)
FIXED IN THIS RELEASE:
Show black point correction choice also when switching from refresh to any other measurement mode instead of only when switching from refresh to LCD measurement mode or vice versa.
Corrected averaged RGB transfer function display.
Adaptive measurement mode could not be disabled (regression of r1152 where adaptive measurement mode was made default in dispcalGUI).
Work-around a very rare problem where a (bogus) display size of 0x0 mm is returned.
Check if the configured colorimeter correction exists before adding it to the list.
Update colorimeter correction and testchart lists after deleting settings files.
Don't carry over colprof arguments from testchart file (fixes occasional wrong display model and manufacturer in profiles).
Average, RMS and maximum delta E metadata was not added to profiles if equal to or greater than 10.
Unhandled exception when 3D LUT window was opened and there was no profile selected under settings and also no display profile set.
Unhandled exception if colorimeter correction does not exist.
Standalone curve viewer: Fix loading of .cal file via commandline argument.
Don't strip trailing zeros when displaying average gamma in the status bar of the profile information or curve window.
Only set adaptive and hires measurement mode when the instrument supports it (fixes measurement mode switching to non-adaptive if toggling betweeen a colorimeter and a spectrometer).
Mac OS X with Argyll CMS 1.5 and newer: Also search library folders for Argyll CMS support files (fixes imported colorimeter corrections not found).
Only fall back to private copy of pnp.ids under Mac OS X and Windows.
Updated link to Datacolor website download section for the Spyder 2 Windows installers.
Transposed bits for EDID red y chromaticity coordinate.
Curve viewer / profile info window: Reset tone response curve calculation when toggling LUT checkbox.
Correctly react to detected display changes when the actual physical displays didn't change (e.g. when switching Argyll between versions supporting and not supporting the virtual “Web” display).
Keypresses or cancel were not recognized during patch reading.
Display uniformity measurements: Q or ESC had to be pressed twice to exit.
Do not use “install profile” message for non-display profiles.
3D LUT: “apply vcgt” checkbox stayed disabled after switching from a devicelink source profile to a non-devicelink source profile.
Update all open windows when switching Argyll versions
Do not reset selected colorimeter correction to none when selecting a preset or a settings file.
Measurement window position was not correct when switching from web display.
Show an error message when choosing a directory as profile save path where no subdirectories can be created.
Python 2.7 compatibility: Mask u16Fixed16Number (fixes profile information not working for profiles with negative XYZ or chromaticity values when using Python 2.7).
wxPython 2.9 compatibility: Do not specify number of rows in dynamically growing FlexGridSizer.
Linux: Use colord's quirk_vendor_name to fix the manufacturer string.
Mac OS X 10.6 and up: Clearing and loading calibration needs root privileges in some circumstances.
Windows: Correctly escape quotes in arguments (fixes hang when profile name, program path or Argyll path contains a single quote).
Windows: Show a meaningful error message when a subprocess can't be started instead of hanging indefinitely.
Windows: Ignore WMI errors.
Windows: Selecting testcharts saved in the root of a drive under Windows.
Windows: Disable broken Windows 2000 support (was broken since 0.8.5.6 when the interactive display adjustment GUI was introduced and is not fixable as Windows 2000 does not implement the required AttachConsole functionality).
Windows/Mac OS X: If Argyll profile installation failed, a success message was still shown.

New in DisplayCAL 1.2.7.0 (Mar 4, 2013)

New in DisplayCAL 1.2.6.6 (Mar 2, 2013)

Added in this release:
Argyll CMS 1.5.0 compatibility.
Ability to do remote measurements using Argyll CMS 1.4.0 and newer (Firefox is recommended as client). See remote measurements and profiling.
Include black level and contrast in profile verification reports (if possible, i.e. if the test chart contains a RGB=0 patch).
3D LUT: Support color space conversion ('spac') profiles.
DCI P3 reference profile.
Add “Quality” (if applicable) and “License” metadata to profiles.
Add colord device ID mapping to profile metadata.
Linux: Add screen brightness to profile metadata if profiling a mobile computer's screen (using the org.gnome.SettingsDaemon.Power DBus interface).
Additional logging.
Changed in this release:
Revised display uniformity test to generate HTML reports.
Use a delay of 200 ms for display uniformity measurements.
Detect “Calibrate failed with 'User hit Abort Key' (No device error)” Argyll CMS error message and ignore further errors to prevent popping up multiple error dialogs.
Reload currently selected calibration after verifying a profile.
Add metadata to fast shaper matrix profiles (e.g. gamut volume and coverage).
When deleting a settings file, also offer CCSS, CCMX and files starting with the settings file basename in the same directory for deletion.
Enable use of absolute values in profile verification reports regardless of testchart.
When loading a profile without calibration settings, look for an accompanying colorimeter correction in the same directory.
When only creating a profile and not calibrating, give a clear choice whether to embed current calibration curves in a profile or not.
When using black point compensation, keep the black point compensated TI3 measurement file in addition to the unaltered file.
When restoring default settings, don't reset the 3D LUT abstract profile as well as 3D LUT and profile info window positions.
Truncate the colorimeter correction description displayed in the dropdown if it's overly long.
Only load linear calibration curves into the curve viewer when resetting the video card gamma table.
Do not remove spaces from the instrument name when assembling the profile name.
Only compress JavaScript in HTML reports if the report.pack_js configuration option is set (default 1 = compress).
Fixed in this release:
Improved instrument event handling.
When measuring the screen using a spectrometer, make sure to repeat the instrument calibration until it is successfully completed or canceled (ColorMunki Design/Photo).
When measuring ambient light with a spectrometer, abort after a 30 second timeout if instrument calibration did not complete.
Correctly react if the instrument sensor is in the wrong position and prompt the user to set the correct position.
Mouse cursor and clicked “Measure” button stayed hidden when aborting a measurement in the display device uniformity test window.
Updating the calibration (vcgt) of a profile didn't work if first selecting a .cal file, ticking the “Update calibration” checkbox and then switching to the profile.
Disable all calibration controls (except the quality slider) when “Update calibration” is ticked.
Only enable “Update calibration” checkbox if calibration can actually be updated.
Disable the “Create colorimeter correction...” and “Create 3D LUT...” menu items as well as the “LUT” checkbox in the curves and profile information windows if Argyll CMS executables are not found.
Update measurement modes when switching Argyll versions.
wxPython 2.9 compatibility.
Set manufacturer, model, creator and ID in reference profiles (except ClayRGB and sRGB from Argyll).
Only switch over to progress dialog after a three second delay (fixes erroneously switching over to progress dialog under Windows when running calibration or display uniformity measurements directly after a canceled testchart measurement).
If using a DTP92, only offer refresh measurement mode.
Make sure updated profiles also have updated descriptions.
Also overwrite .gam.gz and .wrz files if overwriting an existing profile.
Mac OS X: Make sure the menus are re-enabled after calibrate & profile.

DisplayCAL Changelog

What's new in DisplayCAL 3.8.9.3

New in DisplayCAL 3.8.9.2 (Dec 13, 2019)

New in DisplayCAL 3.8.9.1 (Dec 9, 2019)

New in DisplayCAL 3.8.8.0 (Nov 7, 2019)

New in DisplayCAL 3.8.7.1 (Oct 2, 2019)

New in DisplayCAL 3.8.7 (Sep 23, 2019)

New in DisplayCAL 3.8.6 (Sep 6, 2019)

New in DisplayCAL 3.8.5 (Aug 14, 2019)

New in DisplayCAL 3.8.4 (Aug 12, 2019)

New in DisplayCAL 3.8.3 (Aug 12, 2019)

New in DisplayCAL 3.8.2 (Jun 10, 2019)

New in DisplayCAL 3.7.2.0 (Mar 18, 2019)

New in DisplayCAL 3.6.2.0 (Aug 27, 2018)

New in DisplayCAL 3.6.1.0 (Aug 6, 2018)

New in DisplayCAL 3.6.0.0 (Jun 23, 2018)

New in DisplayCAL 3.5.3.0 (Apr 26, 2018)

New in DisplayCAL 3.5.2.0 (Apr 6, 2018)

New in DisplayCAL 3.5.0.0 (Feb 19, 2018)

New in DisplayCAL 3.4.0.0 (Jan 4, 2018)

New in DisplayCAL 3.3.5.0 (Oct 19, 2017)

New in DisplayCAL 3.3.4.1 (Sep 14, 2017)

New in DisplayCAL 3.3.4 (Sep 11, 2017)

New in DisplayCAL 3.3.3 (Aug 9, 2017)

New in DisplayCAL 3.3.2 (Jun 30, 2017)

New in DisplayCAL 3.3.1 (Jun 10, 2017)

New in DisplayCAL 3.3.0 (May 31, 2017)

New in DisplayCAL 3.2.4 (Feb 20, 2017)

New in DisplayCAL 3.2.3 (Jan 5, 2017)

New in DisplayCAL 3.2.2 (Dec 17, 2016)

New in DisplayCAL 3.2 (Nov 19, 2016)

New in DisplayCAL 3.1.7 (Oct 5, 2016)

New in DisplayCAL 3.1.6 (Aug 28, 2016)

New in DisplayCAL 3.1.5 (Aug 3, 2016)

New in DisplayCAL 3.1.4 (Jul 11, 2016)

New in DisplayCAL 3.0.5.0 (Dec 16, 2015)

New in DisplayCAL 3.0.4.3 (Dec 16, 2015)

New in DisplayCAL 3.0.4.2 (Dec 16, 2015)

New in DisplayCAL 3.0.4.1 (Dec 16, 2015)

New in DisplayCAL 3.0.4.0 (Aug 10, 2015)

New in DisplayCAL 3.0.2.0 (Jun 12, 2015)

New in DisplayCAL 3.0.1.0 (Jun 1, 2015)

New in DisplayCAL 3.0.0.0 (May 4, 2015)

New in DisplayCAL 2.6.0.0 (Nov 19, 2014)

New in DisplayCAL 2.5.0.10 Beta (Nov 14, 2014)

New in DisplayCAL 2.5.0.9 Beta (Nov 6, 2014)

New in DisplayCAL 2.5.0.0 (Sep 8, 2014)

New in DisplayCAL 2.1.0.0 (May 13, 2014)

New in DisplayCAL 2.0.0.0 (Apr 24, 2014)

New in DisplayCAL 1.5.2.5 (Oct 23, 2013)

New in DisplayCAL 1.2.7.0 (Mar 4, 2013)

New in DisplayCAL 1.2.6.6 (Mar 2, 2013)

New in DisplayCAL 1.1.8.3 (Feb 5, 2013)

New in DisplayCAL 1.1.2.9 (Nov 6, 2012)

New in DisplayCAL 1.1.2.1 (Oct 6, 2012)