I can not use solvePnP in Calib3d

[kyaohoh]

Hi there,

I've been trying to use the below function.

public static bool solvePnP(MatOfPoint3f objectPoints, MatOfPoint2f imagePoints, Mat cameraMatrix, MatOfDouble distCoeffs, Mat rvec, Mat tvec, bool useExtrinsicGuess, int flags)

I thought that it would work, but I keep getting rvec, tvec only as 0, 0, 0.

I tried adding the "ref" keyword in front of rvec and tvec but it didn't work.

Could you tell me how to get the values?

Thank you, Kyaohoh.

[EnoxSoftware]

Perhaps there is some error on the opencv side. Enclose the point where the error occurs in Utils.setDebugMode() method, and the error on the C++ side will be displayed on the console.

Utils.setDebugMode (true);

solvePnP(MatOfPoint3f objectPoints, MatOfPoint2f imagePoints, Mat cameraMatrix, MatOfDouble distCoeffs, Mat rvec, Mat tvec, bool useExtrinsicGuess, int flags)

Utils.setDebugMode (false);

[kyaohoh]

Thank you for sharing debugging info. I found that I made a mistake when setting cameraMatrix.

I have one more question. Now solvePnP function is working, but not well. It looks like the axis settings are wrong. To fix it, I'm going to do a multiplication operation of the below matrix. (similar to invertYM 4x4 mat you used in sample unity code) 1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0

Do you think it will work?