I am thinking of using real-time video tracking and projection to present a piece in which the dancer's movement is analyzed by the computer in real-time and some animated stuff will be projected on the screen behind the the dancer. However, I noticed that doing real-time video tracking and projection toward the same direction will create a "video feedback loop". The projected animation may also affect the video tracking result.
They said they use infrared camera, but I think the infrared camera only helps make something under darkness more clear. Does it also differentiate real people from projected stuff ?
What are the tips for real-time video tracking and projection ? Is there any way to let the computer system only analyze the body movement of real people (without sensors) and ignore the projected stuff ?