基于点检测的脉冲噪声中值滤波算法

提出了一种基于噪声点检测的中值滤波算法.该算法通过灰度变化率设置阈值判别脉冲噪声点,并将脉冲噪声点信息记录到与图像对应的噪声记录数组中.滤波过程中,根据噪声记录数组的信息,剔除噪声点周围的其它噪声点的灰度信息,使噪声点的灰度值得到较好的还原.该算法与标准中值滤波算法相比,能在滤出脉冲噪声的同时,较好地保留图像的细节信息.

Median filtering algorithm of impulse noise based on noise point

We proposed a median filtering method based on impulse detection in the paper.This method sets the threshold to distinguish impulse noise point through variance rate of gray level.The information of every impulse noise point is added to the array of noise record.In the course of filtering,it can get rid of other noise points around it with the array.The gray value of the filtered noise point is better recovered.Compared with the standard median filtering method,the proposed method can not only remove impuls...