An adaptive pattern based image coding technique using visual pattern and texture pattern

VPIC (visual pattern image coding) and AMBTC (absolute moment block truncation coding) with LUT (look up table) are integrated to form a simple and fast system which yields images with very good visual quality while at moderately high compression rate. The VPs (visual patterns) are designed for subimages with prominent edges, while TPs (texture patterns) used in AMBTC are for high variance blocks. All patterns are 4/spl times/4 and the mapping to VPs or TPs is adaptive, based on mean square error. To further improve the visual quality, these patterns are further classified, and then trained iteratively to multi-level.<
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