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Pamaddnoise User Manual
.SH 1
pamaddnoise
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Updated: 14 November 1995
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Table Of Contents
.SH 2
NAME
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pamaddnoise - add noise to a Netpbm image
.SH 2
SYNOPSIS
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\fBpamaddnoise\fR
[\fB-type\fR \fInoise_type\fR]
[\fB-seed\fR \fIint\fR]
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\fBpamaddnoise\fR \fB-type\fR \fBgaussian\fR
[\fB-sigma1\fR \fIvalue\fR]
[\fB-sigma2\fR \fIvalue\fR]
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[\fB-seed\fR \fIint\fR]
[\fInetpbmfile\fR]
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\fBpamaddnoise\fR \fB-type \fR \fBmultiplicative_gaussian\fR
[\fB-msigma\fR \fIvalue\fR]
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[\fB-seed\fR \fIint\fR]
[\fInetpbmfile\fR]
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\fBpamaddnoise\fR \fB-type\fR \fBimpulse\fR
[\fB-tolerance\fR \fIratio\fR]
[\fB-seed\fR \fIint\fR]
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[\fInetpbmfile\fR]
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\fBpamaddnoise\fR \fB-type \fR \fBlaplacian\fR
[\fB-lsigma\fR \fIvalue\fR]
[\fB-seed\fR \fIint\fR]
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[\fInetpbmfile\fR]
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\fBpamaddnoise\fR \fB-type \fR \fBpoisson\fR
[\fB-lambda\fR \fIvalue\fR]
[\fB-seed\fR \fIint\fR]
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[\fInetpbmfile\fR]
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DESCRIPTION
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This program is part of Netpbm.
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\fBpamaddnoise\fR adds the specified noise type to a Netpbm image.
\fBpamaddnoise\fR treats a PPM image as 3 independent planes, not as
a plane of colors in a color space.
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OPTIONS
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.RS
.IP "\fB-lambda\fR \fIvalue\fR"
Used for poisson noise only.  The default value is 0.05.
.IP "\fB-lsigma\fR \fIvalue\fR"
Used for laplacian noise only.  The default value is 10.0.
.IP "\fB-msigma\fR \fIvalue\fR"
Used for mutliplicative gaussian noise only.  The default value is
0.5.
.IP "\fB-seed\fR \fIint\fR"
Used for all noise types.  Set the initial random number generator
seed value.
.IP "\fB-sigma1\fR \fIvalue\fR"
Used for gaussian noise only.  The default value is 4.0.
.IP "\fB-sigma2\fR \fIvalue\fR"
Used for gaussian noise only.  The default value is 20.0.
.IP "\fB-tolerance\fR \fIratio\fR"
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
.IP "\fB-type\fR \fInoise_type\fR"
Select type of noise by name.  The following noise types are
available: gaussian, multiplicative_gaussian, impulse, laplacian,
poisson.  Only enough letters to be unique are required for the noise
type option.  The default noise type is \fBgaussian\fR.
.IP \(bu
\fBgaussian\fR
.IP \(bu
\fBmulitiplicative_gaussian\fR
.IP \(bu
\fBimpulse\fR
.IP \(bu
\fBlaplacian\fR
.IP \(bu
\fBpoisson\fR
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.RE
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REFERENCES
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.IP \(bu
"Adaptive Image Restoration in Signal-Dependent Noise"
by R. Kasturi Institute for Electronic Science, Texas Tech University,
1982
.IP \(bu
"Digital Image Processing Algorithms" by Ioannis Pitas,
Prentice Hall, 1993 ISBN 0-13-145814-0
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.SH 2
SEE ALSO
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pgmnoise,
pgmmedian,
pnm,
pam,
.SH 2
HISTORY
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\fBpamaddnoise\fR 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).
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Burns' version, and the one in Netpbm 10.29, was called \fBpnmaddnoise\fR
and worked only on PNM images.  In Netpbm 10.30, it was converted to handle
PAM images and renamed to \fBpamaddnoise\fR.
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AUTHOR
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Copyright (C) 1995 by Mike Burns <burns@cac.psu.edu>
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\l'5i'
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Table Of Contents
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.IP \(bu
SYNOPSIS
.IP \(bu
DESCRIPTION
.IP \(bu
OPTIONS
.IP \(bu
REFERENCES
.IP \(bu
SEE ALSO
.IP \(bu
HISTORY
.IP \(bu
AUTHOR
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