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Coding of the residual signal in DT based segmentation using the shape adaptive DCT

WANG Yang li,WU Cheng ke (School of Telecommunication Engineering, Xidian Univ., Xi′an 710071, China)  
This paper proposes a shape adaptive DCT method to encode the residual signal in the DT based segmentation. The shape adaptive DCT is implemented by conducting the one dimensional DCT twice in each triangle. DCT coefficients are uniformly quantized, and Huffman coded in a zigzag order. Simulation results indicate that this method has achieved higher coding performance in comparison with the sole DT method in which better image quality is achieved by increasing the number of Delaunay triangles.
【Fund】: 国家自然科学基金资助项目 !( 6 95 0 2 0 0 4)
【CateGory Index】: TN918.3
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