Summary: A raw image of a ColorChecker Classic chart was processed with three camera profiles: an Adobe Standard profile, a profile made with the ColorChecker Passport application, and a “do-it-yourself” profile made by the author. Accuracy of color reproduction was evaluated with the CIEDE2000 color-difference metric. The ColorChecker Passport profile resulted in the least accurate colors, as measured by average CIEDE2000. The author’s “do-it-yourself” profile produced the most accurate colors. Passport profile colors are systematically biased in the direction of increased chroma (C*). The bias is almost certainly intentional, and possible reasons for it are discussed.
Key words: Sony A6500, camera profile, multiple regression, Adobe Standard camera profile, ColorChecker Classic, ColorChecker Passport application, RawDigger, CIEDE2000