I'm trying to align photos taken underwater. PhotoScan is able to able to correctly find points and match them, but it always marks them as "invalid". For example, in the attached image, you can see that there are many common points in the two images that are correctly paired, but no "valid" pairs.
Does anyone have any ideas what I may be doing wrong?
My one guess, is that the camera has not been calibrated underwater, and the reported data in the EXIF is wrong, as I assume those values are reported for above water. I have entered approximate focal length values for underwater, but that did not help.
I have a few hundred photos in this set, so I don't believe lack of information is the problem.
thank you for any tips or advice...
--ted