1Pgmenhance User Manual(0)                            Pgmenhance User Manual(0)
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NAME

6       pgmenhance - edge-enhance a PGM image
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SYNOPSIS

10       pgmenhance
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12       [-N]
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14       [pgmfile]
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DESCRIPTION

18       This program is part of Netpbm(1).
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20       pgmenhance reads a PGM image as input, enhances the edges, and writes a
21       PGM image as output.
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23       The edge enhancing technique is taken from Philip R.  Thompson's  "xim"
24       program,  which in turn took it from section 6 of "Digital Halftones by
25       Dot Diffusion", D. E. Knuth, ACM Transaction on Graphics Vol. 6, No. 4,
26       October 1987, which in turn got it from two 1976 papers by J. F. Jarvis
27       et. al.
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OPTIONS

31       In addition to the options common to all programs  based  on  libnetpbm
32       (most notably -quiet, see
33        Common Options ⟨index.html#commonoptions⟩ ), pgmenhance recognizes the
34       following command line option:
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38       -N
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40              The optional -N option should be a digit from 1 to 9.  1 is  the
41              lowest  level  of enhancement; 9 is the highest.  The default is
42              9.
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SEE ALSO

48       pamedge(1), pgm(1)
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AUTHOR

52       Copyright (C) 1989 by Jef Poskanzer.
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DOCUMENT SOURCE

55       This manual page was generated by the Netpbm tool 'makeman'  from  HTML
56       source.  The master documentation is at
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58              http://netpbm.sourceforge.net/doc/pgmenhance.html
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60netpbm documentation            13 January 1989      Pgmenhance User Manual(0)