基于阈值的极值中值新型滤波方法

A New Extramum Midian Filtering Method Based on Threshold Value

针对图像滤波中去噪与细节保护的矛盾,在分析极值中值滤波方法的基础上,提出了一种基于阈值的极值中值新型滤波方法。该算法将受脉冲噪声污染图像中的像素点用预判断算子法进一步分为噪声点、边缘细节区和平坦区3种类型,然后做不同的处理以获得良好的细节保护效果。仿真试验结果表明,该方法在去除噪声的同时,能更好地保持图像边缘细节,具有较好的处理效果。

In consideration of the contradiction between noise removal and detail preserving in imaging filtration,on the basis of analyzing extremum median filtering methods,a new method based on extremum median of threshold value is proposed. In the method,the pixel points in the image corrupted by impulse noise are divided into 3 types by pre-judgment operator,such as noise points,edge details and smooth points and different processes are conducted on them for better detail preservation. The emulation result shows that the method can be used to remove the noise,properly preserve the edge details with better effect of processing.