ppmrelief(1)            UNIX System V(11 January 1991)             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@hoh-2.att.com)




































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