Is it possible to have an AR without image target or marker?,Is it possible to make an AR without a marker or target image?

I want to create AR experience to make users sees themselves in another place. So I want it as a video, and it plays when the camera sees the human body in a specific area.

How could this work?

Thanks,I want to make an AR, to make users live in another place, is it possible to make it without target image or marker?

I want to create it as video and when the camera sees the user the video will play.

if possible how?

Thanks

As i know that using marker-less AR ,we can create an AR.

i think your question is quite ambiguous that you want to start video when camera recognize the person then u can easily do it by treating human as a marker .