C代码完成jpeg编码和解码，包括dct，量化，zigzag以及霍夫曼编码、解码-C code to complete jpeg encoding and decoding, including dct, quantization, zigzag and the Huffman code, decoding

matlab中的Zig_Zag扫描程序，需要的朋友可以-matlab in Zig_Zag scanning procedures, the needs of our friends can see. . . .

this is about ZIG-ZAG