随着信息技术的快速发展,为了加快存储和传输图像的速度,提出一种基于离散余弦变换的图像压缩算法.分别从编码中DCT变换,量化以及熵编码三个原理过程及其功能进行详细论述,以MATLAB7.0为平台对系统进行仿真实验,其方法简单、速度快且误差小.从实验结果中观察经过此算法压缩后的图像无失真现象,而且处理图像的速度得到了很大的提高,既能保证有较高的压缩比,又能保证良好的图像质量,从而实现了图像的快速传输,在日常生活中得到了广泛的应用与发展.%With the rapid development of information technology, in order to accelerate the speed of image storage and transmission, it paper proposes a method image compression algorithm based on discrete cosine transform. Respectively discuss from the encoding DCT transform,quantification and entropy coding three principles process and its function in detail. By MATLAB7.0 as a platform for system simulation experiment,the method is simple, fast and little error. From the experiment results in observing after this algorithm compressed image doesn't have distortion,and image speed of treatment is improved. It can guarantee higher compression ratio,and good image quality,thus realize image rapid transmission. It has been extensively applied and developed in daily life.
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