Summary: A. F. Koschan and M. A. Abidi, "A Comparison of Median Filter Techniques for Noise Removal in Color Images,"
Proc. 7th German Workshop on Color Image Processing, pp. 69-79, Erlangen, Germany, October 2001.
125
se p a ra te
m e d ia n
-filte rin g
e n try 1
e n try 2
n 1 n 2
(a )
e n try 1
e n try 2
n 1 n 2
(b )
Figure 1: The edge jitter problem caused by separate median filtering (after [12]).
The original signal represents three segments: left band bounded-right at 1n , the
middle band bounded-left by 1n and bounded-right by 2n , and right band bounded-
left by 2n . Both entries are contaminated by impulse noise: one at the position
31 -n and the other at 12 +n (see Fig. 1(a)). The result of separate filtering with a
window size of five pixels is shown in Fig. 1(b). The impulse at 11 -n in entry 1 is

Source: Abidi, Mongi A. - Department of Electrical and Computer Engineering, University of Tennessee

Collections: Computer Technologies and Information Sciences