摘要： 在对图象的小波变换原理进行讨论的基础上,根据不同频率子带和不同方向的小波系数对恢复图象的重要程度和人眼的视觉特性,对“嵌入式零树小波编码”方法进行了改进,提出了一种较为实用的图象压缩方法。实验结果表明,利用该方法可获得具有较高压缩比、信噪比和较好视觉效果的恢复图象。

关键词: 图象压缩, 小波变换, 零树, 标量量化, 视觉特性

Abstract: This paper presents the theory of wavelet transform to image compressionThe importance of subbands in different scales and different orientations to the human vision are taken into account. By developing the famous embedded image coding using zerotrees ofwavelet coefficients, a better method is proposed. By this method, the subjective quality of the reconstructed is significantly improved.

中图分类号: 

• TP391.4