Cross Ratios and Single View Metrology
Cool. Answers to something I’d always wondered about. I was looking for a ratio so I knew I’d find what I was looking for when it was a ratio but where? Of what kind? Turned out it’s called a “cross ratio” and it’s a ratio of itself to itself compared to a ratio of the projected itself to the projected itself. That’s how I’m wording it anyway.
https://www.coursera.org/lecture/robotics-perception/cross-ratios-and-single-view-metrology-AV44m
===