1Ppmrelief User Manual(0)                              Ppmrelief User Manual(0)
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NAME

6       ppmrelief - compute a relief of a PPM image
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SYNOPSIS

10       ppmrelief
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12       [ppmfile]
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DESCRIPTION

16       This program is part of Netpbm(1).
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18       ppmrelief reads a PPM image as input, and writes a relief of that image
19       as a PPM image as output.
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21       The relief process is described in "Beyond  Photography"  by  Holzmann,
22       equation 3.19.  It's a sort of edge-detection and is essentially a con‐
23       volution with this matrix:
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25           |  1  0  0 |
26           |  0  0  0 |
27           |  0  0 -1 |
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SEE ALSO

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

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

38       This manual page was generated by the Netpbm tool 'makeman'  from  HTML
39       source.  The master documentation is at
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41              http://netpbm.sourceforge.net/doc/ppmrelief.html
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43netpbm documentation            02 August 2014        Ppmrelief User Manual(0)