Title :
On independent color space transformations for the compression of CMYK images
Author :
De Queiroz, Ricardo L.
Author_Institution :
Xerox Webster Res. Center, NY, USA
fDate :
10/1/1999 12:00:00 AM
Abstract :
Device and image-independent color space transformations for the compression of CMYK images were studied. A new transformation (to a YYCC color space) was developed and compared to known ones. Several tests were conducted leading to interesting conclusions. Among them, color transformations are not always advantageous over independent compression of CMYK color planes. Another interesting conclusion is that chrominance subsampling is rarely advantageous in this context. Also, it is shown that transformation to YYCC consistently outperforms the transformation to YCbCrK, while being competitive with the image-dependent KLT-based approach
Keywords :
data compression; image coding; image colour analysis; image sampling; rate distortion theory; CMYK image compression; YCbCrK; YYCC color space; chrominance subsampling; device-independent color space transformation; image-dependent KLT-based approach; image-independent color space transformations; independent color space transformations; independent compression; rate distortion theory; Color; Distortion measurement; Image coding; Image converters; Image generation; Monitoring; Page description languages; Printing; Testing; Transform coding;
Journal_Title :
Image Processing, IEEE Transactions on
