Reconstructor

Camera position reconstructor for Blender, using correlated motion tracker markers across different movie clips to solve camera positions

General Plan/Workflow

1. Create motion tracks from clips with matching focal lengths.
   • Individual images within clips must have the same focal length
   • Clips should be at least partially track-solved (if correspondences found) to derive optical center or distortion params.
2. ADDON: Create cameras for each clip.
   • Alternately, can link clips to existing cameras.
   • Define rough axial position wrt target object (i.e. front, above, left) to prime/constrain solve
   • Crux: cameras correlate with clips.
3. ADDON: Create empties for each tracked element.
   • https://blender.stackexchange.com/questions/248078/how-can-i-get-the-list-of-all-tracking-markers-using-python-command
4. ADDON: Associate correlated empties from different clips, so that their "solves" can converge
5. ADDON: Solve -> Bundle adjust linked empties and cameras to minimize distance between linked empties
   • Beware converging the cameras toward 0
6. RESULT: Cameras and empties positioned in best approximation of analogous 3D positions, with minimized error