SEGMENTATION-BASED IMAGE COMPRESSION

A segmentation-based image coding technique is described. Both uniform and textured region extraction algorithms are used for segmentation. Textured regions are reconstructed using 2-D noncausal Gaussian-Markov random field models. Uniform regions are reconstructed using polynomi al expansions. An arithmetic coder is used for coding the boundaries o f regions. Reasonable quality images are obtained at compression facto rs of 85:1.