【摘要】 论文讨论了将DPCM变换与整数小波变换相结合的方法来实现图像的无失真压缩。在论文压缩算法中,首先对图像进行DPCM预测,将差值图像经过整数小波变换,然后再用无损SPIHT算法进行压缩编码,最后再经过相应的逆变换即可以得到重构的无失真图像。该方法简单易懂,硬件实现方便。仿真结果表明,这是一种效果很好的图像无损压缩方法。更多还原

【Abstract】 A lossless image compression method by combining DPCM transform with integer wavelet transform is presented in this paper.Firstly,DPCM transform is used in this compression algorithm,and the difference image is transformed by integer wavelet,then the bit stream can be gotten by lossless SPIHT algorithm.Finally the reconstruction image is obtained by corresponding reversible transform.This method is simple and hardware implement is easy.The experiment shows that it is an effective lossless image compression method.更多还原