1999.12.08 02:54 "Testing: [was: Test Adobe ZIP TIFF needed]", by Tom Kacvinsky

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