The method consists in the fact that initially the camera shoots an empty room, a detailed map of the visible image is created. Then, when a person appears in the frame, the application calculates which pixels it occupies and replaces them with pixels from the reference map. The work is carried out in real time, the algorithms are still imperfect and traces of human movements are still noticeable. However, he himself is not visible in the retouched video, there are no clues left to identify the visitor.
Mays designed the app out of creative and scientific interest, he does not elaborate on the scope of its application. However, the demo video immediately gives a hint - when a person moves on a soft surface, it typically bends under him, but the application does not restore these fragments of the frame. It looks like an invisible man is walking nearby. This is the first line of work - inexpensive special effects for cinematography.