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ppmrelief(1)                General Commands Manual               ppmrelief(1)

NAME
       ppmrelief - run a Laplacian relief filter on a portable pixmap

SYNOPSIS
       ppmrelief [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  Photography"  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 AT hoh-2.com)

                                11 January 1991                   ppmrelief(1)