用于视频编码的小波域三角形网格构造方法

在深入研究视频图像冗余离散变换特征的基础上，提出一种用于视频编码运动补偿技术的小波域不规则三角形网格构造方法．基于孔径问题的原理，使用冗余离散变换小波的水平和垂直子带构造三角形网格节点的选择判据，把节点的特征匹配度集成到节点前向追踪过程的判据中；通过获得的节点运动矢量和网格映射实现运动补偿功能．实验证明，该方法获得了较好运动补偿的效果．

Wavelet Domain Triangular Mesh Design Method for Video Codec

This paper discuses the feature of redundant discrete wavelet transform and proposes an irregular triangular mesh design method in wavelet domain for motion compensation in wavelet video codec.By the method, first, based on the principles stated by aperture problem, the horizontal and vertical subbands of redundant discrete wavelet transform are used to calculate the mask for choosing mesh nodes.And secondly, the mesh nodes feature magnitude and the mesh patch matching-error are integrated into the criteria of the mesh nodes forward tracking, Finally on account of mesh nodes motion vectors the motion compensation function is implemented by mesh mapping. Experimental results prove that the proposed method improves the efficiency of motion compensation in video coding.