基于多树分片贪婪寻优的方向小波变换图像编码

Image Coding with Directional Wavelet Transform Based on Greedy Algorithm of Multitree Segmentation

为了更好的利用图像的局部方向性,采用方向小波变换和贪婪算法寻找次最优多树分片,并利用易于实现的经验R-D公式作为贪婪寻优准则.实验结果表明,与一些流行的编码方法相比,所给的算法具有较好的编码增益和视觉质量.

A new image coding method was proposed. In order to suffciently take advantage of local directionality of natural images, we adopted directional wavelet transform and greedy algorithm for suboptimal multitree tiling. Meanwhile we utilized empirical R-D formula as the greedy criterion. The results indicate that our method performs better in coding gain and visual quality.