This is the command pgmenhance that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
pgmenhance - edge-enhance a portable graymap
SYNOPSIS
pgmenhance [-N] [pgmfile]
DESCRIPTION
Reads 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.
OPTIONS
The optional -N flag should be a digit from 1 to 9. 1 is the lowest level of enhancement,
9 is the highest, The default is 9.
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