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ppmbrighten.man
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1993-12-09
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ppmbrighten(1) AMIGA (20 Nov 1990) ppmbrighten(1)
NAME
ppmbrighten - change an images Saturation and Value from an
HSV map
SYNOPSIS
ppmbrighten [-n] [-s <+- saturation>] [-v <+- value>]
<ppmfile>
DESCRIPTION
Reads a portable pixmap as input. Converts the image from
RGB space to HSV space and changes the Value by <+- value>
as a percentage. Likewise with the Saturation. Doubling
the Value would involve
ppmbrighten -v 100
to add 100 percent to the Value.
The 'n' option normalizes the Value to exist between 0 and 1
(normalized).
SEE ALSO
pgmnorm(1), ppm(5)
AUTHOR
Copyright (C) 1990 by Brian Moffet Copyright (C) 1989 by Jef
Poskanzer.
Permission to use, copy, modify, and distribute this
software and its documentation for any purpose and without
fee is hereby granted, provided that the above copyright
notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting
documentation. This software is provided "as is" without
express or implied warranty.
NOTES
This program does not change the number of colors.
Page 1 (printed 12/9/93)