Abstract: Apparatus and method for using an image of the human body to control real time computer events wherein data regarding a participant are acquired through any means of imaging without marking the participant or requiring that he or she use or wear a stimulus source, sensing device or special clothing. Perception and feature analysis are carried out by specialized circuitry and computer software, and response to perception is expressed using any device controllable by a computer. Participants generally are unaware of processing delays between action and reaction, and their perception of an event is similar to dealing with a human being or animate creature. Perception and response occur in real time with action and reaction closely coupled.