现代电子技术2016，Vol.39Issue(6)：117-119,3.DOI:10.16652/j.issn.1004-373x.2016.06.031
电子与信息器件基于FPGA的实时大窗口中值滤波器的设计
Design of real-time big-window median filter based on FPGA
武继瑞 1刘泽1
作者信息
- 1. 中国科学院 光电技术研究所，四川 成都 610209
- 折叠
摘要
Abstract
The median filtering has important application in image preprocessing stage,especially for filtering of impulse noise in image. The traditional median filtering algorithm is used to sort the original data according to its size to extract the medi⁃an. The enlarged window size and increasing data cause the dramatical increase of comparison times,which becomes the bottle⁃neck to restrict the real⁃time performance of big⁃window median filter. For this problem,a design method for the real⁃time medi⁃an filter with 25 inputs based on FPGA is presented. It is unnecessary to sort the original data,but a new median is generated according to the information of each bit plane,which is particularly suitable for the filtering implementation based on FPGA. A special bit⁃processing unit was designed to simplify the circuit structure. The method of three⁃level lookup table can solve the time⁃consuming issue of“majority voter”. The experimental results show that the proposed filter has less sources occupation, high data throughput and short time delay,and can satisfy the filtering requirement of any window shapes.关键词
中值滤波/数字滤波器/图像处理/FPGAKey words
median filtering/digital filter/image processing/FPGA分类
信息技术与安全科学引用本文复制引用
武继瑞,刘泽..电子与信息器件基于FPGA的实时大窗口中值滤波器的设计[J].现代电子技术,2016,39(6):117-119,3.
