Tripod and Lock-off Shot Alignment

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‌Tripod and Lock-off Shot Alignment ‌

Tripod-mode shots provide special issues for alignment, since by their nature, a full 3-D solution is not available. Tripod shot tracking provides the pan, tilt, and roll of the camera versus time, and the direction to the trackers, but not the distance to the trackers. So if you need to place objects in the shot in 3-D, it can be difficult to know where to place them. The good news is that wherever you put them, they will “stick,” so the primary concern is to locate items so that they match the perspective of the shot.

There are a number of methods available:

 the single-frame alignment subsystem on the lens panel, which will be described in detail in this section;

 the mesh Pinning Tool described in the Geometric Hierarchy Tracking manual, for when you have a mesh model for some object (perhaps a box or cylinder, but potentially a more complex imported model) that appears in the scene;

 using the known 3-D coordinates (ie from a survey) of many features visible in the scene, which turns the tripod/lock-off shot into a regular 3-D solve, and accordingly won't be described further here.

Single Frame Alignment What Lines Do I Need? Operating the Panel Advanced Uses and Limitations

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