ppmarith
Section: User Commands (1)
Updated: 08 August 1989
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NAME
ppmarith - perform arithmetic on two portable pixmaps
SYNOPSIS
ppmarith -add|-subtract|-multiply ppmfile1 ppmfile2
DESCRIPTION
Reads two portable bitmaps as input.
Performs the specified arithmetic operation,
and produces a portable bitmap as output.
The two input pixmaps must be the same width and height.
The arithmetic is performed between corresponding pixels in the two
bitmaps, with maxval as 1.0, black as 0.0, and a linear scale in between.
Results that fall outside of [0..1) are truncated.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pbmmask(1), pbmpaste(1), pnminvert(1), ppm(5)
AUTHOR
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.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- SEE ALSO
-
- AUTHOR
-
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