摘要
中值滤波器是在脉冲噪声背景下恢复根信号的有效方法。在二维信号处理中,通常定义的各种子窗口不能全面地代表根信号细节方向的多变性。为解决这一问题,本文提出了全方位子窗口的定义,并由此导出了一种新的中值滤波器——全方位二维多级中值滤波器。同时,推导总结出了该新滤波器的分解特性以及输入/输出统计特性。在标准测试图象噪声环境下,实验结果表明在保存细节方面,本文提出的滤波器比Arce的中值滤波器性能提高两倍.
The median filtering is an effective method to restore the rootsignal.Especially,in noise attenuation with detail-preserving,the mediancan perform in best way.The subwindows defined in general do not includethe all oritations,so,we define,in this paper,the omnidirectional subwin-dows,consequently,a new median filter——omnidirectional multilevel medianfilter is proposed.Here,the threshold decomposition property and statisticaloutput/input property are derived.For noise test pattern we make the com-parison between Arce's median filter and that proposed by us.The resultsshow that our filter performs better two times than Arce's for detail-prese-rving.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
1993年第1期46-52,共7页
Chinese Journal of Scientific Instrument
