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ppmrelief.1
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1994-08-27
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ppmrelief(1) USER COMMANDS ppmrelief(1)
NAME
ppmrelief - run a Laplacian Relief filter on a portable pix-
map
SYNOPSIS
ppmrelief [_✓p_✓p_✓m_✓f_✓i_✓l_✓e]
DESCRIPTION
Reads a portable pixmap as input. Does a Laplacian Relief
filter, and writes a portable pixmap as output.
The Laplacian Relief filter is described in "Beyond Photog-
raphy" by Holzmann, equation 3.19. It's a sort of edge-
detection.
SEE ALSO
pgmbentley(1), pgmoil(1), ppm(5)
AUTHOR
Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)
Sun Release 4.0 Last change: 11 January 1991 1