图像编码和解码，程序中调用了IJG的图像压缩库。-Image encoding and decoding, the procedure to call the IJG library of image compression.

IJG JPEG LIBRARY,非常好用的Jpeg解压压缩源码，可以选择分线解压图像-IJG JPEG LIBRARY, very easy to use Jpeg compression decompression source, you can select sub-line-extracting images

最新的IJL源代码,操作JPG文件非常方便-the latest IJG sourcecode, very convinect