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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 ), 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
13 January 1989 | netpbm documentation |