19 April 2000 Achieving idempotence in near-lossless JPEG-LS
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The lossless and near-lossless image compression standard, JPEG-LS, while offering state-of-the-art compression performance with low complexity, fails to be idempotent in near-lossless mode (i.e., images degrade upon successive compression/decompressions). This paper identifies the cause and presents two solutions. First it presents a modification to the compressor and decompressor that maintains or improves the error bounds and achieves idempotence. Second it describes a preprocessor that acts upon any image and returns one upon which JPEG-LS does perform idempotently at the expense of doubling the guaranteed error bound on a small subset of pixels (typically below 0.5%).
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Lyman Hurd, Lyman Hurd, Jose Gerardo Rosiles, Jose Gerardo Rosiles, } "Achieving idempotence in near-lossless JPEG-LS", Proc. SPIE 3974, Image and Video Communications and Processing 2000, (19 April 2000); doi: 10.1117/12.383004; https://doi.org/10.1117/12.383004


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