P: Can't open Tiff files

Jeffrey, how do I send you files?

Both Photoshop and FastStone cease to open ACDSee (and Gigapixel) compressed TIF files once certain dimensions (or maybe pixel-count) are reached.
I can send you two files in an archive, one can be opened in PS, the other cannot. There is only 1 px different in both directions between the two.

While PS flips at 17270 x 13815 px, Faststone flips around 21139 x 16911, but it's not so clear-cut there (sometimes files open, sometimes not). This means that Faststone can open larger ACDsee created images than Photoshop, but both ultimately fail at some point.

Both can open larger Deflate compressed TIFF files from other sources than ACDSee
/Gigapixel.

Hello Jeffrey,

thanks for getting back to us. My test files are all 0.5 to 2 gb large, so not exactly easily shared. As far as I remember the problem is size dependent, so I have to see how small I can make a Topaz Gigapixel TIFF and still not be able to open it in PS.

ACDSee tests were using the trial version, so I don't own that anymore. But as far as I can tell every software that had issues with ACDSee TIFF files also had the same issues with Topaz files. So the latter might suffice.

Howdy Paula,

Sure.  You can send me a couple of SMALL examples at david . MOHR @ a d o b e . C o M  (yeah, I get a LOT of SPAM already...8-P).

I'll take a look and let you know what I come up with, hopefully Tuesday.

Thanks,
David

Can you post a zip file of each of the files you list above? I can investigate.

Hi Dave
I'm having the same problem. I was able to drag and drop once, but can't do it again. Are you able to help?
Paula

Here is a list of TIF files that Photoshop can and cannot read in my tests. The original image is 19200 x 25200 px 8-bit = 1.35 gb uncompressed.

Photoshop CAN read:

ACDSee uncompressed, FastStone LZW, FastStone uncompressed, Gigapixel uncompressed, Photoshop LZW, Photoshop uncompressed, Photoshop ZIP

Photoshop CANNOT read:

ACDSee LZW, ACDSee ZIP, FastStone ZIP, Gigapixel LZW, Gigapixel ZIP

ACDSee and Topaz Gigapixel maybe use the same libraries to create their files, their respective files sizes also match closely.

FastStone Image Viewer has similar problems, albeit partly with different combinations of file source and compression. All these files can be read by various other third party software, like IrfanView, XnViewMp, Paint.Net, ACDSee, Windows Photos and Windows Photo Viewer!

Adobe's support chat is no help and the "wishlist" (feature requests and bug reports) page forwards to this "community" powered support. I have yet to find a support form/ticket system to report the problem, any hint is welcome.

Hey Scott,

Feel free to send me your document and I'll take a look.  In Jack's case, the file wasn't correctly formed.  That might be the case here too.  Email on it's way...

Thanks,
David

I am having the same trouble. TIFF files that will not open in Photoshop on a MAC or PC.
They were generated by a microfilm scanner.

I tried opening them in preview, dragging and dropping them into photoshop and copying the file and changing the extension to .JPG. The file size of each of these files is big enough that I would expect a good file to be there.

I don't know what else to try. They were made on a library's microfilm reader and to return to do it again would be a 3-1/2 hour drive.

I'm hoping someone has a suggestion.
Thank you

Check your email...8-)

I can send a file.