彩色图象的广义分形小波变换压缩算法  

A Novel Algorithm on Color Image Compression Based on 2D Fractal-wavelet Transforms

作　　者：李会方[1] 牛朝 俞卞章[1] 

机构地区：[1]西北工业大学电子信息学院,西安710072

出　　处：《计算机工程与应用》2005年第2期19-21,共3页Computer Engineering and Applications

基　　金：国家自然科学基金(编号:10274060);国家杰出青年基金(编号:69925306)

摘　　要：基于广义二维分形小波变换,提出了一种新的复合分形小波变换图象编码算法,并将该算法推广到三维彩色空间,实现了彩色图象压缩。同时,提出了一种自适应小波子树分割算法。该算法根据图象局部区域纹理的复杂程度对小波树进行分割,有效地避免了解压缩图象中的分块效应。对彩色图象的实验表明在压缩比相同的情况下。新算法可得到更好的图象效果。A generalized class of affine two-dimensional fractal-wavelet transforms has been introduced in this paper.A new hybrid fractal-Wavelet color image coding algorithm is presented.Then,the new approach is extended to3-dimen-sion color space for color image encoding.In order to improve reconstructed image quality,an adaptive wavelet subtrees partition algorithm is given,this algorithm can split the wavelet subtree into children subtrees according to local image complexity.Experimental results for color image prove that the new algorithm can obtain much better coding performance when the compression ratio is the same.

关 键 词：图像压缩 彩色图象处理 广义分形小波变换 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]