一种基于小波分解的无搜索分形图像压缩算法

A new searchless fractal image encoding algorithm based on wavelet decomposition

在不同的小波尺度中,子块基于相应固定位置的父块进行编码,同时利用不同小波尺度之间的相关性进一步缩短编码时间.实验结果表明,与空间域无搜索分形图像压缩方法相比,提出的方法在解码图像质量略有损失的情况下,压缩比提高了近3倍,同时计算量减少了6/7.

Image range blocks are encoded based on fixed location domain blocks in different wavelet scales. Furthermore, the encoding time can be shortened by using the correlation between different wavelet scales. Simulations show that compared to the searchless method in spatial domain, the runtime of our method is shortened about 7 times with a little loss of PSNR, while the compression ratio increases 3 times or so.