Visually lossless compression of color images
Ronald S. Gentile, Jan P. Allebach, Eric Walowit · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1990
A technique is presented for intraframe color image data compression which produces visually lossless imagery compared to the original. This algorithm consists of a color vector quantizer operating in the Luv uniform color space, followed by a reversible codeword assignment strategy that uses prediction to achieve conditional entropy type bit rates. Unlike differential pulse code modulation (DPCM), predicted values are used for codebook selection instead of the computation and coding of a residual signal.