ppmrelief(1)ppmrelief(1)NAMEppmrelief - run a Laplacian relief filter on a portable
pixmap
SYNOPSISppmrelief [ppmfile]
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 Pho-
tography" by Holzmann, equation 3.19. It's a sort of
edge-detection.
SEE ALSOpgmbentley(1), pgmoil(1), ppm(5)AUTHOR
Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)
11 January 1991 1