The tree(3D) ←→ Camera(2D) The tree : The point we're seeing with our eyes, 3D point which has world coordinateCamera : When we take the tree, it transforms to 2DWhen we take the picture of the tree, the camera influenced by the Camera intrinsic parameters-lens, the distance between the lens and the image sensor, the angle between the lens and the image sensor, etc. Therefore, when finding the p..