利用C语言实现JPEG图片解码，转换为BMP图片，在将其灰度化，自定义阈值二值化。

This distribution contains routines for manipulating files formatted according to the Joint Photographic Experts Group (JPEG) standard. Matlab's built-in IMREAD and IMWRITE functions provide basic conversion between JPEG files and image arrays. The routines in this package provide additional functionality for directly accessing the contents of JPEG files from Matlab, including the Discrete Cosine Transform (DCT) coefficients, quantization tables, Huffman coding tables, color space information, and comment markers. It is assumed that the user of this software has a good understanding of both the JPEG compression standard and Matlab data structures. This software is based in part on the work of the Independent JPEG Group (IJG), as it makes use of IJG's free JPEG code library. If the MEX file binaries provided in this distribution are not the ones you need for your system, you will need to download IJG's code library and install it on your system before compiling the source code. See "Installing" for more details. ---- Phil Sallee 9/2003

jpeg压缩的matlab程序，实现bmp图像的dct变换、量化、编码的过程，编译通过。

详细信息请参考： http://blog.csdn.net/ajaxhe/article/details/7383800

基于jpeg ghosts的图像篡改检测算法基于jpeg ghosts的图像篡改检测算法

基于JPRG的彩色图像分块，量化，zigzag，编码压缩matlab代码，适合初学者学习

主要包含详细讲解了JPEG的实现原理，然后结合具体代码分析

读取和修改Jpeg图片内的Exif信息的单元，原版只能读取我稍作修改可以修改Jpeg的信息。

JPEG解码源代码及注释，JPEG编码器源代码分析

linux下的jpeg源码包，在移植部分带有jpeg编码的时候必须用到该源码。