What close-range photography methods can be used to complete the close-range photogrammetry task?

There are close-up telescopic leather cavity method, close-up leather cavity method and close-up mirror method. According to relevant public information, when shooting at close range, the main angle is a straight angle, that is, the line of sight must be aimed at the eyes when shooting. If you want to use the inclination angle or inclination angle, you must first find the angle.