CentOS 7.0 - man page for pgmenhance (centos section 0)
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Pgmenhance User Manual(0) Pgmenhance User Manual(0)
pgmenhance - edge-enhance a PGM image
This program is part of Netpbm(1)
pgmenhance reads a PGM image as input, enhances the edges, and writes a PGM image as out-
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.
The optional -N option should be a digit from 1 to 9. 1 is the lowest level of enhance-
ment; 9 is the highest. The default is 9.
pgmedge(1) , pgm(1)
Copyright (C) 1989 by Jef Poskanzer.
netpbm documentation 13 January 1989 Pgmenhance User Manual(0)
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