Magnetic capture and calibration
 
 
 

Magnetic motion capture devices are sensitive to magnetic interference caused by metallic objects such as aluminium heating ducts, metal plumbing fixtures, and steel-reinforced concrete. This can cause noticeable distortion in captured data.

To minimize distortion, you can remove all metallic objects from the capture area. You can also build an elevated stage to raise the capture area and eliminate interference from beneath the studio floor.

Even after taking these precautions, your studio may still contain some magnetic distortion. To compensate for the remaining distortion, MotionBuilder creates an internal 3D distortion grid as part of the calibration process with your motion capture devices.

The 3D distortion grid represents the amount of distortion the sensors receive at different locations of the capture area. While creating the 3D distortion grid, the calibration pole is physically placed at the corner of each square, and the location of the sensors are recorded. A distortion grid is created using the data from all recorded corners.

Before calibrating, do the following: