[C++] Camera calibration on Windows desktop

Question

Hey there.

I'm using EasyAR for my research project. The tracking works fine but the projection matrix of my camera seems to be wrong. How can I calibrate my camera depending on my local device?

Best regards,

Tobias.

Answer 1

https://www.easyar.com/doc/EasyAR%20SDK/Unity%20Plugin%20Reference/2.0/CameraDeviceBaseBehaviour.html?highlight=camera

Comments

Okay. But how is EasyAR knowing the focal length, distortion parameters of my camera? I would say, without setting these parameters for myself the projection matrix has to be wrong. Unfortunately, there is no setter implemented inside the CameraCalibration class.

I'm using a Logitech c920. The focal length is {1088.00000, 1088.00000} and distortion parameters {0.000000000, 0.000000000, 0.000000000, 0.000000000}. That seems to be incorrect.

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I would say that the tracker is able to determine the projection matrix without know anything about the hardware. As long as the target looks like a solid, 3D-rotated version of itself, you should be able to calculate the matrix.

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"Unfortunately, there is no setter implemented inside the CameraCalibration class."

Is there any update on this problem, or did anyone find a solution to handle with this issue?