This article explains the different options for rig processing.
The number of cameras is fixed by the rig model and cannot be changed.
The reference camera is the camera with respect to which the other cameras are positioned.
There are several processing modes:
- Rely on relatives: To be used if the rig relatives (translations and rotations) should stay fixed and not be optimized/modified.
- Optimize Relative Rotation: Will find matches across all cameras and optimize the rotations accordingly (the translations are fixed).
- Optimize Relative Rotation with a subset of secondaries: Similar to Optimize Relative Rotation, but reducing the computations to decreasing processing time. This is mainly recommended for multispectral cameras in the Pix4D database where the results are similar to Optimize Relative Rotation (but faster).
- Optimize Independently: The rig constraints are relaxed during the last step of calibration, to try to help for possible vibrations. This would make sense for rigs with larger cameras.
- Disable rig: Calibrate ignoring the rig constraints.
- Calibrate rig: Option to obtain the rig constraints (mostly for use internal to Pix4D). Requires GCPs for scale.