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ppmrelief.1
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1996-11-18
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961b
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.TH ppmrelief 1 "11 January 1991"
.IX ppmrelief
.SH NAME
ppmrelief - run a Laplacian relief filter on a portable pixmap
.SH SYNOPSIS
.B ppmrelief
.RI [ ppmfile ]
.SH DESCRIPTION
Reads a portable pixmap as input.
Does a Laplacian relief filter, and writes a portable pixmap as output.
.IX "Laplacian relief"
.PP
The Laplacian relief filter is described in "Beyond Photography" by Holzmann,
equation 3.19.
It's a sort of edge-detection.
.IX "edge detection"
.SH "SEE ALSO"
pgmbentley(1), pgmoil(1), ppm(5)
.SH AUTHOR
Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)
.\" Permission to use, copy, modify, and distribute this software and its
.\" documentation for any purpose and without fee is hereby granted, provided
.\" that the above copyright notice appear in all copies and that both that
.\" copyright notice and this permission notice appear in supporting
.\" documentation. This software is provided "as is" without express or
.\" implied warranty.