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ppmrelief - run a Laplacian relief filter on a PPM image |
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ppmrelief [ppmfile] |
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This program is part of Netpbm(1). ppmrelief reads a PPM image as input, does a Laplacian relief filter, and writes a PPM image as output. The Laplacian relief filter is described in ’Beyond Photography’ by Holzmann, equation 3.19. It’s a sort of edge-detection. |
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pgmbentley(1), pgmoil(1), ppm(1) |
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Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com) |