一种开关中值滤波器的改进

Shuqun Zhang和Monhammad A Karim提出了一种开关中值滤波器算法,其机制是利用4个不同方向的一维拉普拉斯算子来检测像素点是否为噪声.通过判断极值点、修正参数r和对阈值T的自适应处理,提出了一种基于极值的自适应阈值开关中值滤波器.实验结果表明,滤波器算法对椒盐噪声能很好地抑制,能很好地保护图像细节.

Improvement on Switching Median Filter

Shuqun Zhang and Monhammad A Karim proposed an algorithm of a switching median filter which used one-dimensional Laplacian operator of four different directions to detect whether the pixel was noise. However, there are some flaws under the condition of loud noise. Through adaptively processing the determining the extreme points, corrected parameter r and threshold value T, we proposed a adaptive threshold switching median filter based on extreme points. The result showed that the method could control salt-and-pepper noise and protected image well.