1Ppmrelief User Manual(0) Ppmrelief User Manual(0)
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6 ppmrelief - compute a relief of a PPM image
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10 ppmrelief
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12 [ppmfile]
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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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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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40 pamshadedrelief(1), pgmbentley(1), pgmoil(1), ppm(1)
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44 Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)
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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)