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Date: Tue, 07 Dec 1999 21:54:09 -0500 (EST)
From: Tom Kacvinsky <tjk@ams.org>
Subject: Testing: [was: Test Adobe ZIP TIFF needed]
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Testing is going OK.  Here is what I have done so far:

Made a bunch of uncompressed TIFFs in PhotoShop (made from some pretty
cool sample PNGs I downloaded from the PNG home page).

Compressed those TIFFs and the sample TIFFs from libtiff.org with
Adobe Deflate compression.

Opened these new TIFFs in ImageReady/PhotoShop.  The images that
opened fine in ImageReady/PhotoShop were the ones that opened fine
previous to the new compression.  The ones that caused me problems
were from the libtiff sample TIFFs, but they caused problems even
before I recompressed them.

The problematic files are:

off_l16.tif
off_luv24.tif
off_luv32.tif
fax2d.tif
g3test.tif
quad-jpeg.tif
smallliz.tif
text.tif
ycbcr-cat.tif
zackthecat.tif

Would "the gimp" be able to open these?  I'd like to verify that
nothing untowards is happening to the images after recompressing them.
I found that GraphicConverter and Debabelizer also had problems with
these.  I would tend to think that if the gimp uses libtiff, it will
handle them properly.  I hope...  Any other kind of UN*Xy like tools
that you can recommend would be greatly appreciated.

The next part of my test is to save out (from ImageReady) Adobe
Deflate compressed TIFFs and then tiffcp them (using, say, JPEG
compression), and then see if the new TIFFs will open in ImageReady.
I would tend to think that this means libtiff is recognizing and
properly decoding the Deflate compressed TIFFs spit out by ImageReady.

All in all, I would tend to think that libtiff is properly handling the
ZIP compressed TIFFs.

Regards,

Tom

