基于小波理论的图像压缩算法

An image compression algorithm based on wavelet theory

运用小波变换的多分辨特点 ,研究了基于小波的图像压缩技术。利用人眼特性 (HVS) ,提出了分块压缩算法。该算法利用小波系数子带的相关性 ,从而在同样的平均码率下 ,获得了主观感觉较好的重构图像 ,也就是说在同样的主观条件上得到更大的压缩比。另外利用工具软件MATLAB对算法进行了实施 ,结果证明了该算法的有效性。

An algorithm based on wavelet′s multi-resolution-sub-bloc k c oding to compress frequency sub-bands was proposed. Using HVS and the correlati on of the coefficients of sub-bands, a fine compressed image under the same ave rage code rates, and the higher compress rate is got. The algorithm is implemen ted using the MATLAB, and the result proves its validity.