Calibration Takes | MetaHuman Documentation

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Calibration is a critical part of capturing data with stereo camera pair to enable a high-quality data reconstruction. This section shows an example of how to calibrate correctly.

Calibration Board Construction

Calibration requires a calibration board (checkerboard pattern). The default settings for the calibration process are for a checkerboard pattern with a size of 89.5 mm x 134.2 mm and each square measuring 7.5 mm.

You can use the sample from the MetaHuman Calibration Processing plugin found in the following directory:

/Engine/Plugins/MetaHuman/MetaHumanCalibrationProcessing/Content/Boards

The pattern should be printed on high-quality paper and attached to a rigid surface with spray mount adhesive.

The calibration board should have a handle on the back so the operator can hold it without occluding the pattern.

Operation

Specific calibration footage should be taken at the start and the end of a capture session to bookend the shoot. Calibration footage may be captured at other times during the shoot if the helmet needs to be significantly adjusted or the cameras are otherwise compromised.

During calibration capture, you are attempting to paint the space with the calibration board. For each capture, the board should be moved across the field of view, including movements of up, down, left, right, roll, and pitch, in the plane where the performer’s face will be or was positioned. The video should be approximately 20 seconds long. See the example below.