二维DCT变换在JPEG图像压缩中的应用及其MATLAB实现  

MATLAB two-dimensional DCT transform and its application in the JPEG realization of image compression

作　　者：刘雅莉[1,2] 

机构地区：[1]西安电子科技大学,陕西西安710071 [2]商洛学院计算机科学系,陕西商洛726000

出　　处：《电子测试》2014年第3期33-35,共3页Electronic Test

基　　金：商洛学院校级科研项目13SKY010

摘　　要：随着多媒体技术和互联网的迅猛发展,网络中信息的传输量越来越大。为了加快存储和传输图像的速度,本文提出一种基于离散余弦变换的图像压缩算法。分别从JPEG压缩原理、DCT变换及量化等方面进行详细论述,并用MATLAB对该系统进行仿真验证,实验结果显示图像无明显失真,同时又获得了高压缩比。该方法操作简单、速度快,适用于日常数字图像的压缩需求。With the rapid development of multimedia technology and Internet,the network information transmission amount is bigger and bigger.In order to speed up the speed of image storage and transmission, this paper puts forward a kind of image compression algorithm based on discrete cosine transform. Respectively from the aspects such as JPEG compression principle of DCT transform and quantization, elaborated this based on the system with MATLAB simulation,the experimental results show no obvious distortion of image,and also won the high compression ratio.The method is simple,fast and suitable for the daily needs of digital image compression.

关 键 词：图像压缩 DCT MATLAB JPEGA 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]