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分析了嵌入式零树小波编码 (EZW )算法原理和特点。讨论了两个基于EZW算法的改进算法 ,即多级树集合分裂算法 (SPIHT) ,集合分裂嵌入块编码 (SPECK)。最后 ,对这些算法原理进行了比较和讨论 ,说明了嵌入式图像编码的研究方向。
The principle and characteristics of Embedded Zerotree Wavelet Coding (EZW) algorithm are analyzed. Two improved algorithms based on EZW algorithm are discussed, that is, SPIHT and SPECK. Finally, the principles of these algorithms are compared and discussed, illustrating the research direction of embedded image coding.