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Video is just a bunch of still images (except potentially with degraded quality from resolution and/or motion blur) so it's much the same as asking "how does on
by andybak 3y ago
Video is just a bunch of still images (except potentially with degraded quality from resolution and/or motion blur) so it's much the same as asking "how does one practically capture a 3d scene" without the video part. Regular photogrammetry - but with interest and practicality gradually increasing for NeRF style approaches.
(Although I am suprised that there's not more attention being paid to the extra spatial relationships that can be inferred from merely knowing something is a video. Surely it could be used as an extra constraint when inferring camera poses - you know the camera can only move in certain ways from one frame to the next?)
- radarsat1 3y ago> (Although I am suprised that there's not more attention being paid to the extra spatial relationships that can be inferred from merely knowing something is a video. Surely it could be used as an extra constraint when inferring camera poses - you know the camera can only move in certain ways from one frame to the next?) Can I ask why you say this? Camera motion models including Kalman filters of various kinds and constraints on derivatives etc, are absolutely used in SLAM and photogrammetry afaik, and have been for a long time.
- andybak 3y agoOK maybe it's my limited experience but last time i tried it, video was treated as "extract frames and then only use every 50th (or so)" This was a couple of years ago probably. Meshroom and Reality Capture. Maybe I was mistaken or maybe they've improved? Can you point me to software that does use video for photogrammetry in the way you describe?