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Hi

I solved this problem. In fisheye.cpp, I saw that function

void cv::fisheye::projectPoints(InputArray objectPoints, OutputArray imagePoints, InputArray _rvec, InputArray _tvec, InputArray _K, InputArray _D, double alpha = 0, OutputArray jacobian = Mat())

But in interface Calib3d.java, the function is

public static void projectPoints(MatOfPoint3f objectPoints, Mat rvec, Mat tvec, Mat cameraMatrix, MatOfDouble distCoeffs, MatOfPoint2f imagePoints)

The params of implement and interface are not matched. You can solve it by changing position of param in interface as below. In function public static void projectPoints(MatOfPoint3f objectPoints, Mat rvec, Mat tvec, Mat cameraMatrix, MatOfDouble distCoeffs, MatOfPoint2f imagePoints) { Mat objectPoints_mat = objectPoints; Mat distCoeffs_mat = distCoeffs; Mat imagePoints_mat = imagePoints; projectPoints_1(objectPoints_mat.nativeObj, rvec.nativeObj, tvec.nativeObj, cameraMatrix.nativeObj, distCoeffs_mat.nativeObj, imagePoints_mat.nativeObj); return; }

We move position of imagePoints_mat.nativeObj to index 2 of projectPoints_1() call projectPoints_1(objectPoints_mat.nativeObj, imagePoints_mat.nativeObj, rvec.nativeObj, tvec.nativeObj, cameraMatrix.nativeObj, distCoeffs_mat.nativeObj)

And your problem is solved.