ppmrelief man page

ppmrelief — compute a relief of a PPM image

Synopsis

ppmrelief

[ppmfile]

Description

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/ppmre…

Referenced By

pamcrater(1), pamoil(1), pamshadedrelief(1), pgmbentley(1), vidwhacker(6).

02 August 2014 netpbm documentation