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       <span style="font-family: monospace">
26           |  1  0  0 |
27           |  0  0  0 |
28           |  0  0 -1 |
29       </span>
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OPTIONS

33       There are no command line options defined specifically  for  ppmrelief,
34       but it recognizes the options common to all programs based on libnetpbm
35       (See
36        Common Options ⟨index.html#commonoptions⟩ .)
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SEE ALSO

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

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

47       This manual page was generated by the Netpbm tool 'makeman'  from  HTML
48       source.  The master documentation is at
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50              http://netpbm.sourceforge.net/doc/ppmrelief.html
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52netpbm documentation            02 August 2014        Ppmrelief User Manual(0)