change an images Saturation and Value from an HSV map
see also :
[-n] [-s <+- saturation>] [-v <+- value>]
add an example, a script, a trick and tips
no example yet ...
... Feel free to add your own example above to help other Linux-lovers !
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
to add 100
percent to the Value.
’n’ option normalizes the Value to exist between
0 and 1 (normalized).
This program does not change the number of colors.
1990 by Brian Moffet Copyright (C) 1989 by Jef
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