I’m trying to setup a small virtual production system with a green screen, and I’m having trouble getting a useful result from Unreal Camera Calibration’s nodal offset calculation.
I’m using vive trackers directly connected via LiveLink. I use a checkerboard, and have tried tracking the checkerboard with 1 vive tracker, but the reprojection error is always huge and I can’t figure out how to improve it. Any suggestions on improving nodal offset calculations?
Which version of UE? I would suggest getting on 5.6 if not already as there are a lot of improvements to the solver. Make sure the axis of the checkerboard is offset correctly to match the location and orientation of the Camera Calibration Checkerboard in UE. Large reprojection error suggests the sensor size is set incorrectly. Also double check in the Lens file that the imae resolution and the camera feed info are correct. Example sending a 3:2 image from picture camera inside of a HD feed you get image resolution of 1920x1080 and the camera feed would be 1920x1620 because of the black bars on either side of the 3:2 image. Don’t send any mask or hud with your feed to the lens file.