说明：  　介绍了JPEG图像压缩算法,并在MATLAB 数学分析工具环境下从实验角度出发, 较为直观地探讨了DCT 在JPEG图像压缩中的应用。仿真实验表明,用MATLAB 来实现离散余弦 变换的图像压缩,具有方法简单、速度快、误差小的优点,大大提高了图像压缩的效率和精度。 李秀敏1 , 　万里青1 , 　周拥军2 (1. 河南科技大学电子信息工程学院,河南洛阳　471003 2. 中航一集团洛阳电光设备研究所,河南洛阳　471009)
(introduced the JPEG image compression algorithm, MATLAB and mathematical analysis tool environment from experimental perspective, more directly on the DCT in JPEG image compression applications. Simulation results show that the use MATLAB to achieve discrete cosine transform image compression method is simple, fast, the advantages of a small error, which has greatly enhanced the efficiency of image compression and accuracy. LI Xiu-1, Green 1 Wanli, Zhou Yongjun 2 (1. Henan University of Science and Technology of Electronics and Information Engineering College, Luoyang, Henan 471003 2. A350 Luoyang Electro-Optic Equipment Institute, Luoyang, Henan 471009))