jpeg_LS_tao - JPEGLS...

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May, 1999   JPEG-LS --  The new standard of lossless image compression School of Computer Science,  University of Central Florida, VLSI and M-5 Research Group
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    Predictive encoding Q: why prediction?  A: to produce a more “skewed” set of sequence for  entropy encoder Original  sequence 20 21 125 126 30 31 32 Prediction  errors 20 1 104 1 -96 1 1 Prediction example
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    Predictive encoding Lossless JPEG JPEG-LS CALIC ……
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    What’s wrong with Lossless JPEG ? C B A X selection value prediction strategy 7 0 1 2 3 (A+B)/2 no prediction A B C Predictors for lossless coding B+(A-C)/2 A+B-C A+(B-C)/2 4 5 6 Lossless JPEG uses “static” predictor. The prediction model  is determined before the compression starts
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  JPEG-LS is better because… “Dynamic” predictor. The predictor is determined  dynamically Simple edge detection algorithm is introduced to  determine the predictor. Prediction refinement
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This note was uploaded on 06/09/2011 for the course CAP 5015 taught by Professor Mukherjee during the Spring '11 term at University of Central Florida.

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jpeg_LS_tao - JPEGLS...

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