home *** CD-ROM | disk | FTP | other *** search
-
-
-
- ppmarith(1) PBM Plus ppmarith(1)
-
-
-
- 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 out-
- put. 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 pre-
- fix.
-
- 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 docu-
- mentation. This software is provided "as is" without
- express or implied warranty.
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
- Printed 5/25/90 08 August 1989 1
-
-
-
-