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 |

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