NAME

       ppmrelief - compute a relief of a PPM image

SYNOPSIS

       ppmrelief

       [ppmfile]

DESCRIPTION

       This program is part of Netpbm(1).

       ppmrelief reads a PPM image as input, and writes a relief of that image as a PPM image as output.

       The relief process is described in "Beyond Photography" by Holzmann, equation 3.19.  It's a sort of edge-
       detection and is essentially a convolution with this matrix:

           |  1  0  0 |
           |  0  0  0 |
           |  0  0 -1 |

OPTIONS

       There  are  no  command  line  options  defined specifically for ppmrelief, but it recognizes the options
       common to all programs based on libnetpbm (See  Common Options .)

SEE ALSO

       pamshadedrelief(1), pgmbentley(1), pgmoil(1), ppm(1)

AUTHOR

       Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)

DOCUMENT SOURCE

       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The  master  documentation
       is at

              http://netpbm.sourceforge.net/doc/ppmrelief.html

netpbm documentation                             02 August 2014                         Ppmrelief User Manual(1)