摘要
二元正交小波变换能实现图象多分辨率的塔形结构表示，相邻两层水平和垂直方向的分辨率以２（或１／２）的因子改变，上一层的每个系数对应下一层的２×２区域，相邻两层存在着较大的空域相关性，为进一步减少小波变换系数的冗余性，我们提出了图象分层预测差值编码，实验表明分层预测差值编码能从整体上大幅度地减少小波变换系数的冗余性。
This paper is mainly about the study on differential pulse code modulation for image coding based on wavelet transform. Form point of view of image pyramid algorithm for the discrete wavelet, the principle of wavelet transform for image compression is explored. The result of computer simulation has shown that DPCM for image coding based on wavelet transform is better than that of reference ′s.
出处
《计算机辅助设计与图形学学报》
EI
CSCD
北大核心
1997年第4期322-327,共6页
Journal of Computer-Aided Design & Computer Graphics
关键词
小波变换
分层预测差值
编码
多分辨率
图象处理
wavelet transform, multiresolution, differential pulse code modulation.
