摘要
本文提出一种新型噪声图象增强的滤波器-W滤波器。该滤波器能够在有效地滤除噪声分量的同时,增强图象边缘。在图象平坦区,W滤波器输出图象具有足够的分辨率和保真度;在边缘区,避免了传统方法形成的由噪声分量引起的假边缘;改善了图象的视觉效果。理论分析和实验结果表明,W滤波器能够增强任何形状的噪声污染边缘。同CS滤波器(比较选择中值滤波器)性能相比较,本文提出的方法能同时达到滤除噪声和边缘增强的目的,一维和二维信号测试结果有力地支持上述结论。
This paper proposes a new filter for edge enhancing of noisy image, which is called as winsorized mean filter (WMEN, W—filter). It can enhance image edge while suppressing noise components by edge detection and filtering window divided. Output image of W—filter can be provided with excellent resolution and fidelity in smooth region and refrain from false edge using conventional method in edge region, and improve of the image. Theortieal analysis and experimental results have shown that W—filter can enhance any edge shape blurred by noise. The method the paper puts forward can achive oplimization for filtering noise and edge enhancing. Experimental results have supported the conclusion for 1—D and 2—D signal.
