NAME

       pgmenhance - edge-enhance a PGM image

SYNOPSIS

       pgmenhance

       [-N]

       [pgmfile]

DESCRIPTION

       This program is part of Netpbm(1).

       pgmenhance reads a PGM image as input, enhances the edges, and writes a PGM image as output.

       The edge enhancing technique is taken from Philip R. Thompson's "xim" program, which in turn took it from
       section  6  of "Digital Halftones by Dot Diffusion", D. E. Knuth, ACM Transaction on Graphics Vol. 6, No.
       4, October 1987, which in turn got it from two 1976 papers by J. F. Jarvis et. al.

OPTIONS

       In addition to the options common to all programs based on libnetpbm (most notably  -quiet,  see   Common
       Options ), pgmenhance recognizes the following command line option:

       -N

              The  optional -N option should be a digit from 1 to 9.  1 is the lowest level of enhancement; 9 is
              the highest.  The default is 9.

SEE ALSO

       pamedge(1), pgm(1)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

DOCUMENT SOURCE

       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The  master  documentation
       is at

              http://netpbm.sourceforge.net/doc/pgmenhance.html

netpbm documentation                             13 January 1989                       Pgmenhance User Manual(1)