基于球坐标的非线性小波变换图像压缩编码算法

NONLINEAR WAVELET IMAGE COMPRESSION CODING ALGORITHMS BASED ON SPHERICAL COORDINATES

利用小波变换的 3个高频分量之间相关特性 ,提出了基于球坐标变换的非线性小波变换图像压缩编码的方法 .在小波收缩中 ,采用双曲线收缩处理球坐标下的径向分量以提高重建图像的质量 .实验结果表明

A method of nonlinear wavelet transform image compression coding based on spherical coordinate transform was introduced according to the correlation among the high-frequency sub-bands from wavelet transform. In wavelet shrinkage,the radial part in spherical coordinate was processed by hyperbolic shrinkage. The result of experiment proves a better achievable result on its rate and the quality of the reconstructed image.