Test suite for GIF containing images using rarely used features

Question

The specifications (plural, since there are versions 87a and 89a) of the GIF graphics format are easy to find in the internet (for those who don\'t want to google:

Answer 1

Gifsicle is pushing Gif to its limits. I've got an image that exposes decoding bug in OS X.

Answer 2

I was searching for the same thing and came across this page:

http://code.google.com/p/imagetestsuite/

It contains test suites for PNG/GIF/JPEG/TIFF created so that they try to achieve maximum amount of code coverage with the least amount of images based on the open source decoder code-bases. The idea seems good, but I have not yet had time to check out the actual images.

Answer 3

I found this question and didn't find anything comprehensive that I could use. So I wrote PyGIF and made it generate a test suite of GIF images.

Answer 4

I maintain a collection of test images for several file formats here:

https://github.com/drewnoakes/metadata-extractor-images

It contains those from the ImageTestSuite mentioned in Leo's answer, along with others from various contributors over the years.