针对脉冲噪声的双窗口自适应中值滤波方法  

An Adaptive Median Filter with Double Windows for Impulsive Noises

作　　者：胡旺[1] 冯伟森[1] 李志蜀[1] 

机构地区：[1]四川大学计算机学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2006年第4期131-135,共5页Journal of Sichuan University (Engineering Science Edition)

摘　　要：针对中值滤波效果随滤波窗口大小和噪声密度而显著变化的不足,提出了将噪声检测和噪声滤除窗口相分离的方法,采用大窗口检测噪声和小窗口滤除噪声的策略、自适应脉冲噪声滤除策略以提高图象滤波性能。实验表明,该方法在噪声检测的准确性和噪声滤除的有效性方面均有极大提高,并且对不同密度的椒盐噪声都具有很好的滤波性能。To overcome the shortcoming that the effect of median filter for impulsive noise was influenced seriously by the window size and noises density, the detachment of the noise detection window and the noise removal window was proposed for corrupted images by pepper and salt noises. Some strategies, such as the large window for noise detection and the small window for noise removal, and the adaptive filter for impulsive noises removal, was employed to improve the performances of the filter. The experiment results showed that the filtering performances were meliorated by a long way. Meanwhile, the filtering performances of the filter were excellent for different noise densities.

关 键 词：脉冲噪声 中值滤波 双窗口滤波 噪声检测 

分 类 号：TN911.73[电子电信—通信与信息系统]