JPEG 简易文档 V1.0 http://dev.gameres.com/program/visual/other/jpeg.htm
JPEG图片的文件格式 http://blog.csdn.net/shelldon/article/details/54144406
JPEG图像压缩(非常不错) http://blog.csdn.net/shelldon/article/details/54234433
JPEG图像编码解码 http://blog.csdn.net/hesays/article/details/39499091
