ABSTRACT
A CMYK image is often viewed as a large amount of device-dependent data ready to be printed. In several circun-
stances, CMYK data needs to be compressed, but the conversion to and from device-independent spaces is imprecise
at best. In this paper, with the goal of compressing CMYK images, color space transformations were studied. In
order to have a practical importance we developed a a new transformation to a YYCC color space, which is device-
independent and image-independent, i.e. a simple linear transformation between device-dependent color spaces. The
transformation from CMYK to YYCC was studied extensively in image compression. For that a distortion measure
that would account for both device-dependence and spatial visual sensitivity has been developed. It is shown that
transformation to YYCC consistently outperforms the transformation to other device-dependent 4D color spaces
such as YCbCrK, while being competitive with the image-dependent KLT-based......
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