Title :
Median approximating algorithm
Author :
Fotopoulos, Spiros ; Economou, George
Author_Institution :
Dept. of Phys., Patras Univ., Greece
Abstract :
A filter is described which imitates median operation regarding impulse suppression and edge preservation. The algorithm realising the filter is an adaptive moving average filter. The coefficients are derived at each step and are based on the maximum likelihood estimator theory. Searching and sorting operations are avoided and the algorithm is suggested for real-time processing using standard digital hardware or DSPs.
Keywords :
digital filters; filtering and prediction theory; signal processing; subroutines; DSPs; adaptive moving average filter; edge preservation; impulse suppression; maximum likelihood estimator theory; median approximating algorithm; median filtering; median operation; real-time processing; search operation avoidance; sort operation avoidance; standard digital hardware;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19910904
