ppmrelief - run a Laplacian relief filter on a portable pixmap
2. SYNOPSIS ▲
ppmrelief [ ppmfile ]
3. DESCRIPTION ▲
Reads a portable pixmap as input. Does a Laplacian relief filter, and writes a portable pixmap as output.
The Laplacian relief filter is described in "Beyond Photography" by Holzmann, equation 3.19. It's a sort of edge-detection.
4. SEE ALSO ▲
5. AUTHOR ▲
Copyright (C) 1990 by Wilson Bent ()