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Reconstruct 3D object with OpenCV

I am following the OpenCV camera calibration tutorial https://opencv-python-tutroals.readthedocs.io/en/latest/py_tutorials/py_calib3d/py_calibration/py_calibration.html to run camera calibration ret, mtx, dist, rvecs, tvecs = cv2.calibrateCamera(objpoints, imgpoints, gray.shape[::-1],None,None) What I want to do next is to reconstruction the 3D location of some feature points. The features points are defined in the image space. Here is what I am planning to do: […]