Abstract

A quadtree segmented two-dimensional predictive coding technique is presented in this paper for exploiting correlation between adjacent image blocks and uniformity in variable block size image blocks. Visual pattern block truncation coding (VP-BTC) is employed to code the high activity 4/spl times/4 image blocks, with a set of sixteen visual patterns used to encode the 4/spl times/4 bitmaps. Simulation results showed that the new coding technique achieved substantial bit rate reduction with good subjective quality.

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