Spatial Scalable Coding Algorithm of Images Based on Wavelet Transfor m

Image compression algorithms such as EZW and SPIHT hav e a high compression rate. In order to have spatial scalability, SPIHT algorithm is analyzed in this paper. At the same compression rate, it is improved such th at it has spatial scalability. In the proposed algorithm, the coding information of a isolated pixel (significant or insignificant) is outputted to the bitstrea m which the pixel is lo…