AR (what do I do most of the time [ad]) is just the application subset of the science of Computer Vision. Computer Vision (CV) itself is more than just AR. With the CV, you can detect human in the video stream or pictures, and check this person for whether he is wanted or needs medical help. You can check the aircraft for damage in automatic mode, and so on. But first, you must train your program on a large amount of diverse data to execute the detection correctly. Unity invests in this way and provides the solutions to speed up your work. Today, you can get People Generator & Home Interior Generator to train your program. Check the Unity Perception Package here.