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) 11 January 1991 pgmbentley(1)