Adobe Inc.
LOSSLESS IMAGE COMPRESSION USING BLOCK BASED PREDICTION AND OPTIMIZED CONTEXT ADAPTIVE ENTROPY CODING

Abstract:

Embodiments are disclosed for lossless image compression using block-based prediction and context adaptive entropy coding. A method of lossless image compression using block-based prediction and context adaptive entropy coding comprises dividing an input image into a plurality of blocks, determining a pixel predictor for each block based on a block strategy, determining a plurality of residual values using the pixel predictor for each block, selecting a subset of features associated with the plurality of residual values, performing context modeling on the plurality of residual values based on the subset of features to identify a plurality of residual clusters, and entropy coding the plurality of residual clusters.