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Method for Multiple Camera (more than 2) Stereo Calibration

asked 2020-08-12 13:30:21 -0500

ConnorM gravatar image

Hello,

For my project I am looking at using 4 to 8 cameras in order to obtain 3D keypoints (joint centers) on a person walking around an 8m x 3m x 2m capture volume. I am using a ChArUco board for calibration and capturing videos/images of the board at various poses. So far I have successfully calibrated camera intrinsic parameters for each camera, and I have performed stereo calibration with a pair of cameras.

I am curious as to how I should go about expanding this to a setup with various cameras (4+). Is it as simple as creating multiple stereo pairs ( [1,2], [2,3], [3,4] ), or is there a better way to go about this? I have heard some about bundle adjustment but I am not quite sure that is what I am looking for.

Let me know if you need any other information about my project/plans! Thanks.

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answered 2020-08-13 08:15:01 -0500

You could consider using https://github.com/DeepLabCut/DeepLabCut for your project. Their calibration module can calibrate >8 cameras. It's very poorly documented imo, but I figured it out using this https://github.com/DeepLabCut/DeepLab....

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Thanks, it looks pretty close to what I was thinking. Here, https://github.com/DeepLabCut/DeepLab..., they create pairs of cameras to pass to stereoCalibrate.

Do you know anything about bundle adjustment and if it may be helpful for my project? Ideally I would like to use all the cameras in my setup to more accurately estimate 3D position of my keypoints.

ConnorM gravatar imageConnorM ( 2020-08-13 10:44:52 -0500 )edit
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Asked: 2020-08-12 13:30:21 -0500

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Last updated: Aug 12