DocumentCode :
1974762
Title :
Image distortions produced by mean, median and mode filters
Author :
Davies, E.R.
Author_Institution :
Dept. of Phys., London Univ., Egham, UK
fYear :
1998
fDate :
35937
Firstpage :
42522
Lastpage :
42526
Abstract :
Median filters are probably the most widely used of the noise suppression filters that are commonly applied to digital images. They are vastly superior to mean filters since the latter are well known to blur images as well as removing noise. Median filters do not suffer from this disadvantage. Although median filters do not blur images, it has been found that they can cause a certain amount of image distortion by shifting edges (Davies 1997). This paper reviews previous work on the computation of shifts produced by mean, median and mode filters using continuum models. The paper proceeds to show how, in the case of median filters, it can be extended using discrete models to give more accurate predictions that are in line with experimental measurements
Keywords :
median filters; continuum models; digital images; discrete model; edge shifts; image distortions; mean filters; median filters; mode filters; noise suppression;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Non-Linear Signal and Image Processing (Ref. No. 1998/284), IEE Colloquium on
Conference_Location :
London
Type :
conf
DOI :
10.1049/ic:19980441
Filename :
705775
Link To Document :
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