pgmbentley - Bentleyize a portable graymap
pgmbentley [pgmfile]
Reads a portable graymap as input. Performs The Bentley
Effect, and writes a portable graymap as output.
The Bentley Effect is described in "Beyond Photography" by
Holzmann, chapter 4, photo 4. It's a vertical smearing
based on brightness.
pgmoil(1), ppmrelief(1), pgm(5)
Copyright (C) 1990 by Wilson Bent (whb@hoh-2.att.com)