ppmrelief man page

ppmrelief — compute a relief of a PPM image





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)


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


Referenced By

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

Explore man page connections for ppmrelief(1).

netpbm documentation 02 August 2014