Near-lossless image compression: minimum-entropy, constrained-error DPCM.
basic_science · Level V
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- Record sourced from PubMed, PMID 18267396.
- Also identified by DOI 10.1109/83.660999.
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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.