Rotational invariance

[rbcasali]

Hi there, I'm doing some tests on your detector&descriptor and I find it very interesting. I noticed that if I try to evaluate the correspondences between an image and the same image rotated by 90 degrees, ASLFeat does not find any matches. Instead, if I rotate the image by a small angle, the network is able to find the matches up to a limit angle of about 20 degrees. This happens because the descriptor is not invariant to rotations, is it correct? Or am I missing something? Thank you very much!