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Pamaddnoise User Manual(0) Pamaddnoise User Manual(0)
NAME
pamaddnoise - add noise to a Netpbm image
SYNOPSIS
pamaddnoise
[-type noise_type]
[-seed int] pamaddnoise -type gaussian
[-sigma1 value]
[-sigma2 value] [-seed int]
[netpbmfile] pamaddnoise -type multiplicative_gaussian
[-mgsigma value] [-seed int]
[netpbmfile] pamaddnoise -type impulse
[-tolerance ratio]
[-seed int] [netpbmfile] pamaddnoise -type laplacian
[-lsigma value]
[-seed int] [netpbmfile] pamaddnoise -type poisson
[-lambda value]
[-seed int] [netpbmfile]
DESCRIPTION
This program is part of Netpbm(1)
pamaddnoise adds the specified noise type to a Netpbm image.
pamaddnoise treats a PPM image as 3 independent planes, not as a plane
of colors in a color space.
OPTIONS
-lambda value
Used for poisson noise only. The default value is 0.05.
-lsigma value
Used for laplacian noise only. The default value is 10.0.
-mgsigma value
Used for multiplicative gaussian noise only. The default value
is 0.5.
-seed int
Used for all noise types. Set the initial random number genera-
tor seed value.
-sigma1 value
Used for gaussian noise only. The default value is 4.0.
-sigma2 value
Used for gaussian noise only. The default value is 20.0.
-tolerance ratio
Used for impulse noise only. The default value is 0.10. This
means that 5% of all pixel values will be set to 0 and 5% will
be set to the maxval
-type noise_type
Select type of noise by name. The following noise types are
available: gaussian, multiplicative_gaussian, impulse, lapla-
cian, poisson. Only enough letters to be unique are required
for the noise type option. The default noise type is gaussian.
o gaussian
o multiplicative_gaussian
o impulse
o laplacian
o poisson
REFERENCES
o 'Adaptive Image Restoration in Signal-Dependent Noise' by R.
Kasturi Institute for Electronic Science, Texas Tech University,
1982
o 'Digital Image Processing Algorithms' by Ioannis Pitas, Prentice
Hall, 1993 ISBN 0-13-145814-0
SEE ALSO
pgmnoise(1) , pgmmedian(1) , pnm(5) , pam(5) ,
HISTORY
pamaddnoise was added to Netpbm in Version 10.29 (August 2005). It had
been distributed by Mike Burns via his own web site before that (and
continued to be so).
Burns' version, and the one in Netpbm 10.29, was called pnmaddnoise and
worked only on PNM images. In Netpbm 10.30, it was converted to handle
PAM images and renamed to pamaddnoise.
AUTHOR
Copyright (C) 1995 by Mike Burns <burns@cac.psu.edu>
netpbm documentation 14 November 1995 Pamaddnoise User Manual(0)
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