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\
.\" This man page was generated by the Netpbm tool 'makeman' from HTML source.
.\" Do not hand-hack it! If you have bug fixes or improvements, please find
.\" the corresponding HTML page on the Netpbm website, generate a patch
.\" against that, and send it to the Netpbm maintainer.
.TH "Ppmspread User Manual" 0 "20 November 2008" "netpbm documentation"
.SH NAME
ppmspread - displace a PPM image's pixels by a random amount
.UN synopsis
.SH SYNOPSIS
\fBppmspread\fP \fIamount\fP [\fIppmfile\fP]
.UN description
.SH DESCRIPTION
.PP
This program is part of
.BR "Netpbm" (1)\c
\&.
.PP
\fBppmspread\fP reads a PPM image as input and moves every pixel
around a random bit relative to its original position. \fIamount\fP
determines by how many pixels a pixel is to be moved around at most.
.PP
Pictures processed with this filter will seem to be somewhat
dissolved or unfocussed (although they appear more coarse than images
processed by something like \fIpnmconvol\fP).
.PP
The randomness in the image is limited before Netpbm 10.37 (December
2006) -- if you run the program twice in the same second, you may get
identical output.
.UN seealso
.SH SEE ALSO
.BR "ppm" (5)\c
\&,
.BR "pnmconvol" (1)\c
\&
.UN author
.SH AUTHOR
Copyright (C) 1993 by Frank Neumann
.SH DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML
source. The master documentation is at
.IP
.B http://netpbm.sourceforge.net/doc/ppmspread.html
.PP
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