使用libexif为JPEG图片添加EXIF属性，支持交叉编译，在hi3519测试通过。

可以实现JPEG图片及pmg图片的轮播及缩放，编译和运行要使用同一个jpeg库

This package contains C software to implement JPEG image encoding, decoding, and transcoding. JPEG (pronounced "jay-peg") is a standardized compression method for full-color and gray-scale images. This software implements JPEG baseline, extended-sequential, and progressive compression processes. Provision is made for supporting all variants of these processes, although some uncommon parameter settings aren't implemented yet. We have made no provision for supporting the hierarchical or lossless processes defined in the standard. We provide a set of library routines for reading and writing JPEG image files, plus two sample applications "cjpeg" and "djpeg", which use the library to perform conversion between JPEG and some other popular image file formats. The library is intended to be reused in other applications. In order to support file conversion and viewing software, we have included considerable functionality beyond the bare JPEG coding/decoding capability; for example, the color quantization modules are not strictly part of JPEG decoding, but they are essential for output to colormapped file formats or colormapped displays. These extra functions can be compiled out of the library if not required for a particular application. We have also included "jpegtran", a utility for lossless transcoding between different JPEG processes, and "rdjpgcom" and "wrjpgcom", two simple applications for inserting and extracting textual comments in JFIF files. The emphasis in designing this software has been on achieving portability and flexibility, while also making it fast enough to be useful. In particular, the software is not intended to be read as a tutorial on JPEG. (See the REFERENCES section for introductory material.) Rather, it is intended to be reliable, portable, industrial-strength code. We do not claim to have achieved that goal in every aspect of the software, but we strive for it. We welcome the use of this software as a component of commercial products.

纯C语言+libjpeg实现最简单jpeg图片解码显示程序

对比使用jpeglib.h, 调用jpeglib压缩,相同质量.jpeglib库的调用,消耗1s 时间才合成.使用纯c算法,使用0.3s

使用matlab编写的JPEG基本系统压缩与解压缩算法，压缩输入为一幅灰度图像，输出一个由‘0’和‘1’组成的字符串，代表二进制编码，解压输入为一个由‘0’和‘1’组成的字符串，输出一幅灰度图像。 程序主要由DCT变换、量化、Huffman编码等子程序组成，模块实现并非调用matlab自带函数，根据模块原理编写，辅助对JPEG基本系统的理解

JPEG图像压缩编码及其MATLAB仿真实现,利用matlab实现数字图像处理

可对任意大小的矩阵进行zigzag排序 可用于JPEG压缩等过程。 Matlab程序 非常好用，欢迎下载！

个人觉得还可以 虽然还没有实现商编码，还是可以用的

静态JPEG图像的编解码程序，注释详尽，Matlab实现。