hufman coding. Input QUALITY determines the amount of information that is lost and compression achieved. Y is an encoding structure containing fields: Y.size Size of X Y.numblocks Number of 8-by-8 encoded blocks Y.qualit

霍夫曼编码；量化到8位字节每个像素编码及解码(Write a MATLAB function [zipped, info] = pixel_coder(X) that takes an image X and using the Huffman coder above applied in the pixel domain quantized to 8 bits per pixel returns the coded sequence zipped along with the header