Detect & Present movements. Mammal Visual system

This functions presents a figure with only moving regions of the video. The user can control signal source (a file or a device on the computer) several parameters, to achieve the presentation of regions he is interested in. App user will have to set for the default parameters. Perhaps I'll think of a version where those params can also be changed inside App. This function can be though of as a mammal vision system simulation (some mammals, like dogs, see only object that move). My son likes to play the following game: first he is hiding (he stays still, to get a totally dark screen), and the he moves, and shown by the application.
See video form my web-camera: https://www.youtube.com/watch?v=4HneLWBIFVQ