I'm trying to stitch a scan of a large area made using a microscope but I'm not having a whole lot of luck.
I started testing with 3 images extracted from a scanning video.
I stitched each 2 matching images but when I want to combine the 2 new composite images it looks very warped.
Does anyone know a decent way to stitch multiple images scanning a surface by changing the perspective but not the angle of view? I've only found ways that assume that the perspective remains constant and you are just rotating around that

Alternative to this problem: is it possible to align images using keypoints without warping?
edit: I've got it working now without any distortions but does anyone know a way to merge images while ignoring black? I want to get rid of these black lines beneath the image.

