基于像素域的改進的SPIHT算法:分層樹的集分割算法是一種簡單、有效的嵌入式零樹編碼算法.在算法的基礎上提出了一種基于空域的改進方法.首先將圖像的偶數裂像素減去相鄰兩奇數列的均值,形成分裂圖像.然后將分裂圖像的奇數列提取出來作為主圖像,將偶數列提取出來作為幅圖像.最后將主幅圖像以合適的權值分別進行壓縮-Pixel-based domain improved SPIHT algorithm: the set partitioning in hierarchical tree algorithm is a simple, efficient embedded zerotree coding algorithm. In the algorithm based on an improved method based on the airspace. First of all, the even split the image pixels minus the two adjacent odd-numbered out of the mean to form a split image. and then split the images out of the odd-numbered extracted as the main image will be extracted out as even-numbered images. Finally, the main image to the right to appropriate values for compression