I have to analyse images of different eyes for pupil size and lid angles. I’ve got always a set of about 20 pictures of the same eye in various positions. My idea was to first centre all the images according to the found pupil. I would learn the pattern from the first image (straight forward position, pupil in the centre of the image) and then centre the other images according to the found pattern. How can I do this? Would you generally say that this might be the right way? Sorry I am still a beginner. Thanks for rescuing me!