title: Near-lossless image compression: minimum-entropy, constrained-error DPCM.
abstract: A near-lossless image compression scheme is presented. It is essentially a differential pulse code modulation (DPCM) system with a mechanism incorporated to minimize the entropy of the quantized prediction error sequence. With a "near-lossless" criterion of no more than a d gray-level error for each pixel, where d is a small nonnegative integer, trellises describing all allowable quantized prediction error sequences are constructed. A set of "contexts" is defined for the conditioning prediction error model and an algorithm that produces minimum entropy conditioned on the contexts is presented. Finally, experimental results are given.
authors.affiliation: Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721, USA.
authors.forename: L
authors.initials: L
authors.lastname: Ke
authors.forename: M W
authors.initials: MW
authors.lastname: Marcellin