CHROMiX CGATS File Handling

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MAX_DEVICE_VALUE    100
MAX_DEVICE_VALUE    100
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This will allow for maximum RGB values of 100
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This will allow for maximum RGB values of 100, or
MAX_DEVICE_VALUE    1.0
MAX_DEVICE_VALUE    1.0

Revision as of 21:54, 8 April 2016

CHROMiX products open and interpret the popular CGATS.17 text file format to import color ink, spectral, RGB device and other values.

This page documents the expectations of values in CGATS files and techniques to successfully import CGATS text files into CHROMiX products.

This information is relevant to Maxwell Client v5.5 or later, Curve4 and later and ColorThink 4 and later (some of which are not announced or released at the time of page creation - so if they don’t get released, don’t blame us)

RGB Values

RGB values are expected to be in the range of 0-255 when they appear in RGB_R, RGB_G, RGB_B columns.

If your values are not in this range, add the following line to the file header to have your values interpreted properly:

MAX_DEVICE_VALUE 100

This will allow for maximum RGB values of 100, or

MAX_DEVICE_VALUE 1.0

This will allow for maximum RGB values of 1

Other values will be ignored and the normal maximum of 255 is unnecessary

CMYK and other Ink Values

Ink values are expected to be in the range of 0-100 when they appear in CMYK_C, CMYK_M, CMYK_Y, CMYK_K or nCLR columns.

If your values are not in this range, add the following line to the file header to have your values interpreted properly:

MAX_DEVICE_VALUE 255 MAX_DEVICE_VALUE 1.0

This will allow for maximum Ink values of 255 or 1

Other values will be ignored and the normal maximum of 100 is unnecessary


Spectral Values

Spectral reflectance values are expected to be in the range of 0-1 when they appear in SPECTRAL_380, SPECTRAL380, nm380 and nm_380 style columns. (with expected flourescence overages)

If your values are not in this range, add the following line to the file header to have your values interpreted properly:

MAX_SPECTRAL_VALUE 100

This will allow for maximum spectral values of 100 (with expected flourescence overages)

Other values will be ignored and the normal maximum of 1.0 is unnecessary

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