DT分割中误差信号的自适应DCT编码

提出了一种编码Ｄｅｌａｕｎａｙ三角形化分割后插值误差的自适应离散余弦变的方法，这种方法是通过Ｄｅｌａｕｎａｙ三角形内的两次一维离散余弦变换来实现的。自适应变换的系数采用单一步长量化，并按三角形内的Ｚｉｇｚｓａｇ扫描顺序进行Ｈｕｆｆｍａｎ编码。

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

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.