How to change the front and rear cameras for face recognition

The method of replacing the front and rear cameras is as follows:

Face recognition can be shot with a rear camera, just open the face recognition interface and flip the camera. The accuracy of face recognition using the rear camera will be higher, because the pixels of the rear camera will be higher than those of the front camera. When using the rear camera for face recognition, aim the camera at the face, and then follow the prompts.