Calibration is a prerequisite for generating depth data, and therefore necessary to solve animation in MetaHuman Animator from a stereo camera pair. It can be generated directly in Unreal Engine from footage of a calibration (or checker) board. Refer to the Calibration Capture Guidelines page for information on how best to capture this footage.
Ingest the calibration board footage using Live Link Hub. This will create a Capture Data asset.
Right-click on the Capture Data asset in the Content Browser and select Generate Calibration.
Configure the settings for your calibration board. The default settings should match the calibration board recommended in the Calibration Capture Guidelines.
Property Description Package Path
The location within the project in which to store the created assets.
Auto Save Assets
Whether to automatically save the generated calibration assets.
Sample Rate
Rate at which calibration frames are sampled; for example, a value of 30 means that every 30th frame is used.
Low sample rates will increase the processing time.
Board Pattern Width
The number of internal corners on the width of the board. This is the same as the number of squares minus one.
Board Pattern Height
The number of internal corners on the height of the board. This is the same as the number of squares minus one.
Board Square Size
The edge size of each square in cm.
Sharpness Threshold
The allowed blurriness (in pixels) of the frame that will be used. Any frames with an estimated blurriness above this threshold will be ignored.
Click Continue.
Once complete, a Camera Calibration asset referencing a LensFile asset for each camera will have been created in the target folder. The LensFile asset is part of the Unreal Engine Virtual Production toolkit.
Next Up
Generate Depth
This guide shows you how to generate depth data from footage captured using a stereo camera pair.