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1991-08-11
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ppmrelief(1) Unix Programmer's Manual ppmrelief(1)
NNNAAAMMMEEE
ppmrelief - run a Laplacian Relief filter on a portable pixmap
SSSYYYNNNOOOPPPSSSIIISSS
ppppppmmmrrreeellliiieeefff [_p_p_m_f_i_l_e]
DDDEEESSSCCCRRRIIIPPPTTTIIIOOONNN
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.
SSSEEEEEE AAALLLSSSOOO
pgmbentley(1), pgmoil(1), ppm(5)
AAAUUUTTTHHHOOORRR
Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)
11 January 1991 1