CT&A REVISION HISTORY

For versions 4.x and older, please

consult the CT&A Help manual.

Versions 6.0 / 6.0.x Versions 5.4 / 5.4.5 / 5.5.0 / 5.5.1 Version 5.3 Version 5.2 Version 5.1 Version 5.0

Version 6.0.7 b407 (2022-04-22)

(Maintenance release)

Improvement: • Spectral data in CGATS and TEXT files (see “Input file formats” in Specifications - Spectral tools): In the past, if 380 nm data was detected, 730 nm data was required; also, if spectral data started at 400 nm, the program looked only for 700 nm data. Now, data is required between 400 and 700 nm. Any valid data between 380 and 730 nm will be used. Missing data will be extrapolated to complete the 380 to 730 nm range necessary for processing. Spectral data lower than 380 nm and higher than 730 nm is discarded. o This improvement affects the following tools: CRI, ISO 3664+, Metamerism Index (color patches, illuminant), RAL DESIGN, Whiteness. Bug fixes: • CRI tools: Now will not round the data on the chroma shift graph of TM-30-20 reports and will show a decimal for values between -10 and +10. • Density tools: o The “Show (Ref.)” checkbox is now unselected and disabled when first opening the tool. o SCTV is computed even if another formula (Murray-Davies or Yule-Nielson) is selected in the “Dot / Tone (Dot Area)” tool. The problem was noticeable when saving the measurements. o Now properly displays the measurement conditions in the dialog and file name when saving Density measurements for instruments which do not support multiple measurement conditions. • RGB vs RGB tool: Now updates the RGB vs RGB chromaticity diagram to the mouse-down event position when rapidly dragging the mouse afterwards with the mouse button down. Before the fix the canvas was updated only when not moving, moving slowly, or bringing the mouse outside the chromaticity graph. Other: • CRI tools: Replaced TM-30-18 references by TM-30- 20. The TM-30-20 version integrates Annex E and Annex F which were published separately after TM- 30-18 was issued and it has a new page layout. The computation methods and the technical content are the same in both versions. • New compiler version version with revised APIs. This compiler improves compatibility with recent OSs.

Version 6.0.6 b402 (2021-11-03)

(Maintenance release)

Bug fix: • TIFF images from CT&A can now be opened in Photoshop CC 23: TIFF images from CRI / TM-30-18 reports and ISO 3664+ / ISO 12646 Targets now include the specific data required by CC 23. Adobe may also have fixed the issue so that TIFF images from previous CT&A versions will also open. Other: • i1Pro 2 and i1Pro 3 instruments (from X-Rite): The libraries/DLLs (Windows) and Frameworks (macOS) have been updated to their latest versions.

Version 6.0.5 b401 (2021-04-08)

(Maintenance release)

Bug fix: • ( macOS Big Sur 11) RGB vs RGB tool : Improved program stability when resizing the window. New feature: • ISO3664+ tools: Now shows the MI value as well as the MI Quality Grade on the screen. Improvement: • CRI tools: The TM-30 Color Vector Graphic (CVG) graph is now smoothed (screen and reports).

Version 6.0.1 b399 (2020-10-07)

(Maintenance release)

Bug fix: • (Mac 64 bit only) Display profile recognition: Now properly identifies the profile of additional displays connected to a given computer instead of assigning the main display profile. This bug affected the rendering of patches on secondary displays.

Version 6.0 b398 (2020-08-03)

New features: • Added support for the X-Rite i1Pro 3 and i1Pro 3 Plus spectrophotometers: o These instruments are available in all tools. o Supported measuring modes: reflectance, emission, ambient illumination. These modes are not available in all tools. o M0/M1/M2 Measurement Conditions: available in all tools with reflectance input. o M3 Measurement Conditions (i1Pro 3 Plus): available in the Density and Graph tools. • Munsell tools: A bidirectional set of tools to convert FROM and TO Munsell Hue Value/Chroma (HVC). o Convert from Munsell to RGB and L*a*b*. o Convert from RGB to Munsell. o RGB spaces: The 24 standard spaces plus the Custom space defined in the RGB vs RGB tool. o Convert from L*a*b* to Munsell. o L*a*b* illuminants: 15 predefined illuminants plus a Custom illuminant defined in the RGB vs RGB tool. o Measure spectral data and convert to Munsell. o Supported instruments: X-Rite i1Pro series spectrophotometer. Measurements Conditions: M0, M1, M2 (when supported by the instrument). o Instruments supported in 32 bit and 64 bit packages. o Export a report with tab-delimited data that can be directly imported in a spreadsheet program and opened in many text editing applications. The report spectral measurements can also be read by software, such as BabelColor PatchTool, which can open CGATS compatible files. • Density tools: Added support for the M3 (Pol.) Measurement Conditions. Requires an i1Pro 3 Plus. • Graph tools: Added support for the M3 (Pol.) Measurement Conditions. Requires an i1Pro 3 Plus. • CRI tools: Added computation and display of TM-30- 18 Color Rendition Categories (Preference, Vividness, Fidelity) in three Priority Levels as defined in TM-30- 18 Annex E. The Color Rendition performance can be included in text file and graphics reports. Improvements (same as for Version 5.5.0 b389): • Whiteness tools: Now check if there is a measurement with a filter before changing the filter setting. • (Mac) Now assigns more noticeable background colors to many data fields for “non-English” systems. Bug fixes (same as for Version 5.5.0 b389): • Density tools: o Now recomputes the Dot / Tone (Dot Area) and Apparent Trap when remeasuring the paper. o The paper status stays green if new paper measurements fail. Old measurements remain valid. o Now recomputes the SCTV paper data when changing the Measurement Conditions. o Now exports the correct “Average D_sol” when saving SCTV data. • CRI tools: The program will now correctly reselect a previously selected row when a non-selected row is deleted or when many rows without the selected row are deleted. • Spyder5 and SpyderX: The program now properly detaches these instrument libraries when the instrument is deselected. • RGB vs RGB Custom space: Now shows the proper primaries when the default Custom space is shown the first time the Custom space dialog is opened Other: • (Mac 64 bit only) The provided 64 bit install files are compliant with current Apple notarization requirements. Notarization is required for some software in macOS 10.14.5 and is mandatory for all software starting with macOS 10.15. Please note that any software meeting notarization requirements may not be fully compatible with a given OS version; see the CT&A system requirements for more information. • (Mac) The program is now released in a 64 bit package only. This change main effect is to drop support of legacy instruments for which 64 bit DLLs/Frameworks are not available. Please consult the various “Supported instruments” sub-sections in the CT&A Specifications page for more information.

Version 5.0 b358 (2016-06-20)

New features: • IES TM-30-15 (CRI tools): Added the IES Method for Evaluating Light Source Color Rendition to the CRI tools ( https://www.ies.org/ ). o Data output: The Fidelity Index (Rf); the Gamut Index (Rg); the fidelity index for skin (Rf,skin); the color fidelity (Rfces) for each of the 99 Color Evaluation Sample (CES); the color fidelity (Rfh) for each of the 16 Hue Angle Bins; the chromaticity coordinates (J’a’b’) of all CES reference and test patches; the color difference (DeltaE’) for each set of CES patches; the average chromaticity coordinates (a' M , b' M ) of the Hue Angle Bins; and the normalized chromaticity data used to draw the Color Vector Graphic (CVG). o Graph displays: A graph of the reference source, which is different from the source used in other color rendering metrics when the CCT is between 4500 K and 5500 K; a bar graph of the color fidelity by sample (Rfces); a bar graph of the color fidelity by Hue Angle Bin (Rfh); a graph of the average chromaticity (a' M , b' M ) of the reference and test data of the Hue Angle Bins, which is used to compute the gamut area; a Color Vector Graphic (CVG) used to evaluate color saturation and desaturation; a plot of Rg versus Rf; and a visual representation of the 99 CES reference and test patches. o Data input: Instrument or file input; a connected instrument is NOT required for file input. o File input: CGATS or Plain text files; 5 nm or 10 nm spectrum bandwidth; 380-730 nm or 400- 700 nm spectrum ranges. The file may contain one or more spectrums; multiple files can be inputted with drag-and-drop. o Supported instruments: Any i1Pro or i1Pro 2 with ambient adapter (the adapter is an option in some models). o Input is processed internally with a 5 nm bandwidth; 10 nm data is interpolated to 5 nm. o Custom export dialog: Select amongst the data used for the graphs, the general and specific metrics indices, and the Test source data. o Export all measurements or only selected measurements. o Export in a single file report or in a batch of individual files (one file per measurement), or both options. o The single file report or the individual files can be exported in either CGATS format, which can easily be used for file input afterwards, or in Plain text format. • ISO 3664+ tools: Data entry forms were added to fill the reports description data fields. The forms appear when you press the ‘Print report…’ button. Two forms are presented, one for the P1, P2, and T1 Viewing Conditions, and another for the Color monitors Viewing Condition. Improvements: • CRI tools: o You can now select one or two of the available metrics, in any order, for better display use. o A separate button was added to load a file from an input menu; this is useful if an instrument is not connected when you use the CRI tools. You can also drag and drop one or more files on the button (you can still drag and drop files on the data table!). o You can now open files with more than one spectrum. o You can now also select the CGATS file type for ‘One file’ reports; this is useful if you want to open all your measurements from one file afterwards. o A ‘Resample’ option was added to the ‘Spectrum bandwidth’ section of the CRI export dialog. This option is recommended when you export measurements made with a 5 nm bandwidth to a 10 nm bandwidth. • ISO 3664+ tools: o A separate button was added to load a file (with one spectrum) from an input menu. You can also drag and drop one (1) file on the button. o Because of this new button, you can now load a file even if an instrument is NOT connected! Bug fixes: • ISO 3664+ tools (Windows version only): Now correctly shows the text and background colors of the PASS/FAIL labels. Please note that the text was always correct. • ISO 3664+ tools (Mac version only): Corrected a problem where, is some cases, the arrow buttons did not change the measurement position. Before the fix, the workaround was to first press on the ‘Tab’ key before using the arrow buttons. Other: • New licensing system: o Licensing is now based on a ‘Product Key’ which is used to activate a specific computer. o You can transfer a Product Key to another computer by deactivating the first computer and activating the second one. If you are connected to the Internet, this process is free and you can repeat it as you require. If the computer is not connected to the Internet, offline activation and deactivation is possible but a service fee is required for each activation; this fee can be paid from the BabelColor Web site. o The same key can be used for the Mac and Windows versions (one OS at a time!). o Once a Product Key is activated on a computer, an Internet connection is not required.

Version 5.1 b364 (2017-01-31)

New features: • Metamerism Index (MI) tools: o Added the Metameric Index (MI) computed according to CIE15:2004, Section 9.2.2.3. This index is computed when the Special Metamerism Index (SMI) obtained with the Reference illuminant is NOT zero. The MI is derived with a Multiplicative Correction applied to the data of the Sample patch obtained with the Test illuminant. o Note: The MI computed in previous versions, based on the HunterLab formula, is still available. It is now identified as “MI (HunterLab)”. o File input: It is now possible to enter spectral data from a file in addition to measurement from an instrument. A connected instrument is NOT required for file input. Input can be assigned to any of the supported Measurement Conditions (M0, M1, or M2). o Input file formats: CGATS or Plain text files; 380- 730 nm or 400-700 nm spectrum ranges; 10 nm bandwidth. The file may contain one or more spectrums; multiple files can be inputted with drag-and-drop. o In addition to the MI report, you can now save the Reference and Sample patches spectrums in a CGATS format text file, which can easily be used for file input afterwards. • RAL DESIGN tool: o File input: It is now possible to convert spectral data from a file. A connected instrument is NOT required for file input. The input data is immediately converted and saved in a CGATS format text file. o Input file formats: CGATS or Plain text files; 380- 730 nm or 400-700 nm spectrum ranges; 10 nm bandwidth. The file may contain one or more spectrums; multiple files can be inputted with drag-and-drop. o Output data: L*a*b* computed with Illuminant D65 and the 10 degree Observer; the color in RAL DESIGN notation; the individual RAL Hue, Lightness, and Chroma (HLC) components. Improvements: • CRI tools: Data table interface improvements. o Now updates the CRI window when browsing in the data table with the up-down arrows; there is no need to do a carriage return. o Will now select all ambient sources added by drag-and-drop in the data table. o The last input is always selected for display purposes and the data table is automatically scrolled to the bottom. o When measuring a light source with an instrument, the sample name is selected and you can edit it immediately. • FluoCheck tools: When saving the report from an instrument measurement, the report now includes the spectral data for all Measurement Conditions. • RAL DESIGN tool: When saving the report from an instrument measurement, the report now includes the spectral data for all applicable Measurement Conditions. • RGB vs RGB tool: The CIEDE2000 color difference is now computed with the alternate three terms form equation in which the fourth term associated with rotation (R T ) is now integrated with the chroma and hue differences. The DeltaE* display of the RGB vs RGB tool now shows the weighted L 00 , C 00 , and H 00 values (and h’), instead of the unweighted L*, C*, and H* values (and h). • Preferences – Color tab: The dialog now includes buttons which open various folders where user and system display profiles are stored. Other: • Preferences – Color tab (Mac): Because Apple ColorSync is deprecated, it is no longer possible to provide the path of a display profile. The name of the profile assigned to a monitor is still available. • Windows OS: Windows Vista is no longer supported. • i1Pro DLL (Windows): Version 4.2.3 of the library (i1Pro.dll) is now provided with the program.

Version 5.2 b374 (2018-07-26)

New features: • Density tool: Added the SCTV formula for “Dot / Tone (Dot area)” measurements (SCTV: Spot Color Tone Value, as defined in ISO 20654:2018 “Graphic technology — Measurement and calculation of spot colour tone value”). • RGB vs RGB tool: o It is now possible to define an RGB space with negative chromaticity coordinates when using the Custom RGB space dialog. As before, the Custom RGB space settings can be used to generate an ICC profile. o Because negative chromaticities may result in negative xyY and XYZ values, an option to clip or not the xyY and XYZ data values to zero was added to the “Math” tab of the Preferences dialog. o Four (4) new standard RGB spaces were added to the RGB space selection menu: ACES AP0; DCI P3 Theater; Display P3 (used on Macs by Apple); Rec. 2020 (UHDTV). Improvements: • RGB vs RGB tool: The following control settings are now saved and reassigned when the program reopens: RGB space selection menu; RGB input values; L*a*b*/L*u*v* menu; L*a*b* / L*u*v* in D50 checkbox; L*a*b*/L*u*v* input values; DeltaE* formula selection menu. Bug fixes: • Activation: Fixed an issue where an OutOfBoundsException message was shown if attempting activation when the computer Ethernet cable was not connected to a router. The OFFLINE activation dialog is now shown. • RGB vs RGB tool (macOS): Fixed the issue where the text within some buttons was clipped in high resolution displays. Other: • This version was compiled in 32 bit executable files (Mac and Windows) and a 64 bit executable package is also available for Mac. • (Mac 64 bit only) Instrument support changes: o The following instruments/drivers are no longer available: Eye One Display, i1Pro / i1Pro 2 (non- XRGA). o The following instruments/drivers remain available: i1Display Pro, i1Pro / i1Pro 2 (XRGA). • (Mac) The minimum system requirement is now Mac OS X 10.9.5 (Mavericks).

Version 5.3 b380 (2019-01-15)

New features: • IES TM-30-18 / CIE 224:2017 (CRI tools): Added the 2018 version of the IES Method for Evaluating Light Source Color Rendition to the CRI tools ( https://www.ies.org/ ). o TM-30-18 is an update of TM-30-15 required in order to harmonize it with CIE 224:2017 (which is only concerned by the Color Fidelity Index (Rf)). The Rf of TM-30-18 and CIE 224:2017 are identical. o In addition to the text file report which is available to all metrics, it is possible to generate graphic reports as per the TM-30-18 method guidelines. Three report types are available: Simple, Intermediate, and Full. These reports are saved as images in PNG, TIF, BMP, or JPG format. The image resolution is selectable at 96, 150, 300, or 600 DPI. • TM-30-15 and TM-30-18 (CRI tools): We now compute the Local Chroma Shift (Rcs,h) and Local Hue Shift (Rhs,h) for all Hue Angle Bins in addition to the previously available Local Color Fidelity (Rf,h). o It is now possible to display the Local Chroma Shift or Local Hue Shift graph in the CRI tool window. o It is now possible to export the Local Chroma Shift and Local Hue Shift data in text reports (You can also export Local Chroma Shift and Local Hue Shift data in graphic reports for TM- 30-18). • Spectral interpolation (“Math” tab of the Preferences dialog): o In previous versions, when required, interpolation of 5 nm values from 10 nm spectrums was performed with the “Lagrange” method. You can now select between the “Cubic spline” and the “Lagrange” methods. o Used for all computations in the CRI tools. o Used for the CRI and the Visible Metamerism Index (MI, ISO 23603) in the ISO 3664+ tool. o Used to compute the CRI in the Graph and MI tools. Bug fix: • RGB vs RGB tool (Windows version only): Fixed the issue where the RGB vs RGB window minimal size was not properly assigned. This problem could be seen in systems with high resolution displays where the display magnification is higher than 100%. Other: • TM-30-15 and TM-30-18 (CRI tools): o Moved the CIECAT02 gamut fix option to the “Math” tab of the Preferences dialog. • CRI export data dialog TM-30 data fields: o Added the Local Chroma Shift (Rcs,h) and Local Hue Shift (Rhs,h) data fields. o Removed the less pertinent chromaticity and CVG data fields (J’a’b’, a’b’(avg), CVG data). o You can export either TM-30-15 or TM-30-18 data, or both. • CRI tool: Tweaked the Out-Of-Range colors and thresholds of the CRI metrics result.

Version 5.5.1 b390 (2020-10-07)

(Maintenance release)

Bug fix: • (Mac 64 bit only) Display profile recognition: Now properly identifies the profile of additional displays connected to a given computer instead of assigning the main display profile. This bug affected the rendering of patches on secondary displays.

Version 5.5.0 b389 (2020-08-03)

(Maintenance release)

Improvements: • Whiteness tools: Now check if there is a measurement with a filter before changing the filter setting. • (Mac) Now assigns more noticeable background colors to many data fields for “non-English” systems. Bug fixes: • Density tools: o Now recomputes the Dot / Tone (Dot Area) and Apparent Trap when remeasuring the paper. o The paper status stays green if new paper measurements fail. Old measurements remain valid. o Now recomputes the SCTV paper data when changing the Measurement Conditions. o Now exports the correct “Average D_sol” when saving SCTV data. • CRI tools: The program will now correctly reselect a previously selected row when a non-selected row is deleted or when many rows without the selected row are deleted. • Spyder5 and SpyderX: The program now properly detaches these instrument libraries when the instrument is deselected. • RGB vs RGB Custom space: Now shows the proper primaries when the default Custom space is shown the first time the Custom space dialog is opened

Version 5.4.5 b386 (2019-11-26)

Improvements: • NTSC RGB space (RGB vs RGB tool): Tweaked the RGB to XYZ and XYZ to RGB matrices of the NTSC RGB space in order to better match the space illuminant coordinates. Bug fix: • (Mac 64 bit only) Fixed a bug affecting all windows showing color-corrected patches. The bug generated a NilObjectException error message before shutting down the program. The problem affected the most recent macOS versions (Yosemite, Catalina). Other: • macOS 10.15 Catalina support: As of November 26, 2019, no issues were found while using this version of CT&A with macOS 10.15.1 Catalina. Please see the CT&A system requirements for other OS requirements. Version 5.4 b384 (2019-10-01) New features: • Added support for the Datacolor SpyderX colorimeter: o This instrument is currently used in the "RGB vs RGB" tool (and not in the spectral tools). o Supported models: SpyderX Elite, SpyderX Pro. o Select any of the four Datacolor-provided calibration matrices: Any monitor, Standard gamut LED, Wide gamut LED, GB LED. o Instrument supported in 32 bit and 64 bit packages. • Added support for the Datacolor Spyder5 colorimeter: o This instrument is used in the "RGB vs RGB" tool (and not in the spectral tools). o Supported models: Spyder5ELITE, Spyder5PRO, Spyder5EXPRESS. o Select any of the four Datacolor-provided calibration matrices: Any monitor, Wide gamut LCD w/CCFL backlight, Wide gamut LCD w/RGB LED backlight, Wide gamut LCD w/CCFL2 backlight. o Select between two measurement speeds. o Instrument supported in 32 bit and 64 bit packages. Bug fixes: • CRI tools: o The program will not crash when generating a TM-30-18 report that contains non-valid numbers derived from severely non-compliant light sources (such as red only). o A Duv too big is now shown as “OOR” (Out-Of- Range) instead of “1000” (an extremely high Duv value) in TM-30-18 reports. o The CRI tool and CRI reports now show “OOR” (Out-Of-Range) instead of “999 K” for values too low and “100001 K” for values too high. o (Mac) Changed the tool shortcut letter from “command+shift+Q” (a log-out shortcut) to “command+shift+T”. While this was not a problem in Windows, we changed the tool shortcut letter from “Ctrl+shift+Q” to “Ctrl+shift+T” in Windows. • RGB vs RGB tool: Now properly refreshes the DeltaE formula menu and the Delta labels when the tool window is first opened. • (Mac 64 bit only) Selecting "Try to connect again..." in the Instrument menu now correctly selects the previous instrument. Other: • Instrument calibration is now required before the next measurement whenever the instrument is changed. • A “Forced deactivation…” menu item is added to the Help menu. This procedure may be helpful when the status of the Product Key activation is ambiguous (i.e. when the “Activate” menu is available even if the program was known to be activated on this specific computer). • (Mac 64 bit only) The provided 64 bit install files are compliant with current Apple notarization requirements. Notarization is required for some software in macOS 10.14.5 and will be mandatory for all software starting with macOS 10.15. Please note that any software meeting notarization requirements may not be fully compatible with a given OS version; see the CT&A system requirements for more information (see also the current status in the macOS compatibility section) .