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Overview Tab
Device and Profile Connection Colorspace
The box area on the left of the Overview Tab summarizes the information regarding the device colorspace of the profile.
The box on the right summarizes the information regarding the Profile Connection Space (PSC) of the profile.
The arrows and the colored block represent a summary of the type of profile (matrix vs. look up table (LUT) vs. Named Color Profile), the precision (8 or 16 bit), the grid size of a LUT-based profile, and the number of custom colors in a Named Color Profile (NCP).
LUT - based profile
Color Tabs
For device profiles, the color tabs in the overview represent the colors of the primaries of the device as they were read when the profile was made. The white bar at the bottom of each tab can be clicked to reveal the Lab values of the colors.
For device link profiles the tabs show a representation of how colors will be modified by the profile. As no colorimetric information is contained in device link profiles, default RGB and CMYK profiles are used to display colors to screen. If the link profiles refer to color spaces other than CMYK, RGB, Lab or XYZ, there are no standard profiles available via ColorSync and color tabs will not be displayed. When available, the tabs will open to show device settings. Please refer to the Tutorials section of this manual for an example of evaluating a device link profile.
The Lab and XYZ tabs represent the Profile Connection Space (PCS) and are for illustration only. They cannot be dragged for graphing or other purposes.
Device Link Profiles
Device Link Profiles are used exclusively to convert from one set of device colors to another and as a result, contain no colorimetric information. To display CMYK or RGB colors on screen, the default RGB and CMYK profiles set in the ColorSync control panel are used.
Named Color Profiles
Named Color Profiles (NCP’s) are properly opened and the number of colors in the profile is displayed. An “Export Color List” button is available and allows the export to the worksheet of the NCP’s list of colors for further analysis and graphing.
Monitor Profiles
Monitor profiles will display the measured white point in Kelvin.
Gamut Volume
The gamut volume number here represents cubic Lab values. This provides a reasonable approximation of the number of uniquely perceptible colors contained in a device's color gamut. This is intended for relative comparison purposes only.
For RGB and CMYK profiles, gamut volume is calculated according to ISO 18621-11 (2019-12) which uses an asymmetrically-divided profile resolution. To visualize this resolution, select ISO Stepsfor the resolutions when graphing the profile.
The gamut calculation method specified in ISO 18621-11 only applies to RGB and CMYK device profiles. When calculating the gamut volume for any other device profile space (including expanded gamut profiles) ColorThink 4 uses a similar algorithm to the CMYK method, expanding it to nColor channels.