pgmenhanceSection: User Commands (1)
Updated: 13 January 1989
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NAMEpgmenhance - edge-enhance a portable graymap
SYNOPSISpgmenhance [-N] [pgmfile]
DESCRIPTIONReads a portable graymap as input. Enhances the edges, and writes a portable graymap 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.
SEE ALSOpgmedge(1), pgm(5), pbm(5)
AUTHORCopyright (C) 1989 by Jef Poskanzer.