2014.05.21 14:26 "Re: [Tiff] Inconsistencies in tiff library tool operation", by Bob Friesenhahn

Also, I'd like to know if there is a way to determine out whether a Tiff image file is faithful to specifications.

There is no validation test like that. We do our best and then use our eyeballs to see if the results look correct, and try other well respected software to see if it looks the same.

It would be a good idea to provide a program that tells two things:

whether an image is valid
whether it is baseline TIFF, or beyond

Can you name what software is respected and used in these tests?

It would certainly be useful to have an included program which strives to determine those two points.

I do try to make sure that GraphicsMagick handles valid TIFF as much as possible. It tries to be 'valgrind' clean so that 'valgrind' alerts are more likely to be due to libtiff. Of course, GraphicsMagick is not a libtiff tool.

I will give you a list of images from the following collection which encountered valgrind problems.

https://github.com/ZaaLabs/ZaaIL-TestImages/tree/master/

I am did not find the images you list in that collection.

Where did they come from?

Bob
--
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/