基于图象分割的空间自适应冗余小波降噪方法

提出了一种基于图象分割的空间自适应冗余小波图象降噪方法。标准的正交小波降噪方法通过对图象的小波系数进行阈值操作来达到降噪的目的。但是标准正交小波降噪方法由于缺少平移不变性和采用全局的阈值使降噪效果受到影响。为此引入冗余小波变换和空间自适应阈值的思想,文章中讨论了这种降噪技术的理论基础和技术细节。实验结果显示这种方法在性能上要大大优于标准正交小波降噪方法。

A Spatially Adaptive Redundant Wavelet Denoising Method Based on Image-Segmentation

This paper presents an image-segmentation-based method o f spatially adaptive redundant wavelet denoising,The standard orthogonal wavel et denoising methods are used to do threshold operation for wavelet coefficient to clear image noise.However,the lack of translation invariant and global th reshold can poison the denoising result.To solve this problem,an new spatially adaptive denoising method based on redundant wavelet is developed in this pape r.The theory fundamental and algorithm detail is discussed.The experiment res ult shows the proposed method is better than the standard one.