JPEG压缩算法的若干改进

Several Amelioration of Algorithmic for JPEG Compress

在多媒体的技术处理过程中,图像压缩技术应运而生,而MATLAB本身又是一种用于科学工程计算的高效率高级语言,它同时提供了很多的矩阵软件包。文中就JPEG压缩算法中的采样,FDCT,量化表等做了进一步改进,即采用和MATLAB的接口来进行采样;采用快速的矩阵乘积来进行FDCT;根据压缩的不同要求而定的量化表来适应不同场合的压缩要求,从而实现图像的去噪和压缩处理。

Image compression is one of the newly developed multimedia technologies.And MATLAB is an advanced language for scientific engineering calculation.It can supply a good many matrix software packages at the same time.This paper proposes a modified method of FDCT sampling and quantity table of JPEG  carrying out FDCT through fast matrix multiplication and sampling at the interface of MATLAB and C.The quantity table is thus built up so that it will fit in with various compression situations and hence the image compression is realized.