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JPEG-LS PowerPoint Presentation

JPEG-LS

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JPEG-LS

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    1. JPEG-LS ISO 14495

    2. ???JPEG-LS ???????????????????? specifies encoder processes for converting source image data to compressed image data specifies decoder processes for converting compressed image data to reconstructed image data provides guidance on how to implement these processes in practice

    3. JPEG-LS????? JPEG-LS????????????????/???????, ISO-14495-1/ITU-T.87,??????LOCO-I??(LOw COmplexity LOssless COmpression for Images)?(?:http://www.hpl.hp.com/loco/) ?????:????????,?????????????????,???????????(loss, ????);?????loss = 0.

    4. LOCO-I Marcelo J. Weinberger, Gadiel Seroussi, and Guillermo Sapiro(1996) LOCO-I: A Low Complexity, Context-Based, Lossless Image Compression Algorithm, in Proceedings of Data Compression Conference, J. Storer, editor, Los Alamitos, CA, IEEE Computer Society Press

    5. LOCO-I ?? ?????Huffman????????????

    6. ?????? ?????????????:???????? ???????????????????,xi=x1x2xi ,???????????????????p( .|xi)???xi+1. ??????????,????????????: ??,??xi???????xi+1?????xxi+1 ??xi+1????,????????????? ??xi+1?????????ei+1 = xi+1-xxi+1,?????

    7. LOCO-I??? ?? ????? ???? ?????? ?? Golomb-Rice?? ?????? ???? ???????

    8. Causal Template for LOCO-I LOCO-I?????????????: x?????,a b c d e???????