Pgmenhance User Manual(1) General Commands Manual Pgmenhance User Manual(1)
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 ⟨index.html#commonoptions⟩ ), 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)
Generated by dwww version 1.15 on Sat Jun 29 02:36:48 CEST 2024.