灰度图像的DCT及之字形扫描，量化，反量化，逆扫描，图像复原-DCT and the gray image of the zigzag scan, quantization, inverse quantization, inverse scanning, image restoration

本程序实现简单JPEG压缩编码和解码功能。将一副64*64的灰度图进行JPEG压缩编码，编码过程包含DCT转换，量化，ZigZag扫描和游程编码。不包含DC分量的DPCM编码和最后的霍夫曼编码，但是基本实现了JPEG编码，具有较好的压缩率。-This procedure is simple JPEG compression encoding and decoding functions. This is a 64* 64 grayscale JPEG compression encoding p

matlab实现zigzag扫描和逆扫描-matlab realize zigzag scan & izigzag scan