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Procedure to verify digital color systems
Author(s) -
Brill Michael H.
Publication year - 1998
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.1985214
Subject(s) - gamut , standard illuminant , rgb color model , computer science , icc profile , color space , computer vision , color balance , rgb color space , artificial intelligence , color management , color depth , point (geometry) , computer graphics (images) , color model , mathematics , color image , image processing , geometry , image (mathematics)
— The present environment for cross‐media color reproduction is fraught with communication problems and incompatibilities. To measure the extent to which this problem is being solved by new initiatives, a procedure is described to verify color transfer between video display units (VDUs) through a digital medium. In its simplest form, verification involves measuring the tristimulus values of a test pattern on a VDU and comparing them with published target values. To accommodate gamut mismatches, the test colors are desaturated enough to fit in most any device's color gamut. To accommodate white‐point differences, the test colors are adapted to each VDU's white point using an illuminant‐reflectance model. The procedure is reduced to practice in the simple case of 8‐bit RGB values used directly to drive one standard CRT and four test devices (including two flat‐panel displays). The initial tests involved simple RGB routing with no intervening color‐management system to reflect the character of the device. As an expected result, the color reproduction receives low marks through the present measurement criterion. Adjustment of the criterion as it meets reality is a subject for future endeavor.