testPoint        1515 modules/calib3d/test/test_cameracalibration.cpp         double testPoint[4] = {0.0, 0.0, 100.0, 1.0};
testPoint        1516 modules/calib3d/test/test_cameracalibration.cpp         Mat reprojectedTestPoint = Q * Mat_<double>(4, 1, testPoint);