knn
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Name
knn - k nearest neighbour noise reduction
Syntax
knn <input image> <output image> <n> <k>
Description
Performs k nearest neighbour noise removal.
n x n is window size.
Averages over center pixel and k neighbours,
using histogram updating technique.
Restrictions
The input image must have pixel type unsigned byte.
Reference
L. S. Davis & A. Rosenfeld:"Noise Cleaning by
Iterated Local Averaging" IEEE trans. on syst.,
man, and cyb., vol smc-8, no 9, 1978.
See also
knn(3), mbknn(1), kncn(1), mbkncn(1)
Author
Tor Lønnestad, BLAB, Ifi, UiO
Examples
knn mona.img monaknn.img 5 9
Id
$Id: knn.c,v 1.24 1997/01/10 16:03:52 svein Exp $