Based on the magnitude distribution law of DWT coefficients of color image data in Karhunen-Loeve space, SPIHT algorithm is applied to the three KLT components of each group.

• 为了解决这一问题,本文先将一幅图像分成小的块,再对各个小块进行KL变换,然后根据KL空间中的各子带小波系数的关系,利用改进的SPIHT算法对各个块进行编码。