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February 1998
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1998.02.28 00:34 "Re: TIFF validation tests?", by Sam Leffler
Try using tiffcp to conver from G4 to some other compression algorithm and
then view the resulting image. If there's a problem you'll still be unsure
if it's the input data or tiffcp but chances are that it's the input data.
Sam
-----Original Message-----
From: SmithDan <dpbsmith@ecrm.com>
To: tiff@sgi.com <tiff@sgi.com>
Date: Monday, February 23, 1998 9:30 AM
Subject: TIFF validation tests?
We provide two software products; one is a RIP, which we OEM from
another vendor, add drivers for our own imagesetters, and release with
our own name; another is a computer-to-plate server which we develop
ourselves. In one configuration, the RIP writes TIFF files which our
server is supposed to input. In SOME cases, with SOME images, all of
which happen to be wider than 65,536 pixels, our TIFF-reading code is
unable to read their TIFF output. In all cases, Group IV compression
is used.
We're maybe 60% sure the problem is with their TIFF writer, not our
TIFF reader. We are not yet sure if it is a tag issue or if it is
a Group IV compression issue.
What's the quickest way to resolve this issue? Are there any TIFF-file
_validation_ programs? Any reliable viewers for TIFF files _wider than
65,536 pixels (Photoshop is limited to 30,000 max)? _