giftopnm
Section: User Commands (1)
Updated: 20 May 2000
Index
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NAME
giftopnm - convert a GIF file into a portable anymap
SYNOPSIS
giftopnm
[-verbose]
[-comments]
[-image
N]
[GIFfile]
DESCRIPTION
Reads a GIF file for input, and outputs portable anymap.
OPTIONS
- -verbose
-
Produce verbose output about the GIF file input.
- -comments
-
Only output GIF89 comment fields.
- -image
-
Output the specified gif image from the input GIF archive (where
N
is '1', '2', '20'...).
Normally there is only one image per file, so this option
is not needed.
All flags can be abbreviated to their shortest unique prefix.
BUGS
This does not correctly handle the Plain Text Extension of the GIF89
standard, since I did not have any example input files containing them.
SEE ALSO
ppmtogif(1),
ppm(5).
AUTHOR
Copyright (c) 1993 by David Koblas (koblas@netcom.com)
LICENSE
If you use
ppmtogif,
you are using a patent on the LZW compression method which is owned by
Unisys, and in all probability you do not have a license from Unisys
to do so. Unisys typically asks $5000 for a license for trivial use
of the patent. Unisys has never enforced the patent against trivial
users. The patent expires in 2003.
Rumor has it that IBM also owns a patent covering
ppmtogif.
A replacement for the GIF format that does not require any patents to use
is the PNG format.
LICENSE
If you use
giftoppm,
you are using a patent on the LZW compression method which is owned by
Unisys, and in all probability you do not have a license from Unisys
to do so. Unisys typically asks $5000 for a license for trivial use
of the patent. Unisys has never enforced the patent against trivial
users. The patent expires in 2003.
Rumor has it that IBM also owns a patent covering
giftoppm.
A replacement for the GIF format that does not require any patents to use
is the PNG format.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- BUGS
-
- SEE ALSO
-
- AUTHOR
-
- LICENSE
-
- LICENSE
-
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