We do a research on several optical flow implementations. The primary goal is to find, which one best fits our needs, and which parameter values work better than others. Now we do our tests on some self-made photos. But we're not sure if it's the best choice.
Are there any specific test images that can be used for this purpose, similar to test functions for optimization problems?
There are a lot of Optical Flow benchmarks where you can get samples. The most common are Middlebury, the KITTI2012/2015, SIntel and the HAMA dataset/benchmarks. But most recent optical flow methods struggle with large motions, varying illumination and low contrast/textures.