They need LIDAR or stereopsis. IMO stereopsis could probably do a better job than LIDAR much more redundantly, and for a tiny fraction of the cost. But neither

They need LIDAR or stereopsis. IMO stereopsis could probably do a better job than LIDAR much more redundantly, and for a tiny fraction of the cost. But neither is insane to me. Structure-from-motion is all you could get with monocular vision, and I would not trust that as the primary means of depth estimation, especially with no redundancy.