25. A computer system that facilitates interaction with a user, comprising a processor executing the following components stored in computer memory: an object processing system for processing object information of one or more objects in a scene, the object processing system including: a tracking component that at least tracks the one or more objects selected by running a set of multiple hypotheses on a plurality of moving objects detected within an engagement volume, where multiple trackers comprising at least a first and second tracker are utilized to simultaneously track at least one object from the one or more tracked objects such that the second tracker continues to track the at least one object upon failure of the first tracker to track the at least one object, wherein the set of multiple hypotheses are supported by frame-to-frame tracking through time in at least one view and stereo matching across two views, and wherein when a distance between the at least an object and a second moving object falls below a threshold distance the second object is removed from consideration on an assumption that trackers tracking the at least an object and the second moving object are tracking a single object; a seeding component that iteratively seeds the tracking component with object hypotheses based upon the objects that are tracked; a filtering component that selectively removes one or more of the tracked objects and corresponding object hypothesis from the set of object hypotheses in accordance with predetermined criteria; and an interpreting component that interprets object characteristics of the at least an tracked object and causes a command to be executed in response thereto; an input system for receiving user input separately or in combination with the object processing system; and a presentation system for presenting information to the user in response to at least one of the command being executed and receiving user input via the input system.
25. A computer system that facilitates interaction with a user, comprising a processor executing the following components stored in computer memory: an object processing system for processing object information of one or more objects in a scene, the object processing system including: a tracking component that at least tracks the one or more objects selected by running a set of multiple hypotheses on a plurality of moving objects detected within an engagement volume, where multiple trackers comprising at least a first and second tracker are utilized to simultaneously track at least one object from the one or more tracked objects such that the second tracker continues to track the at least one object upon failure of the first tracker to track the at least one object, wherein the set of multiple hypotheses are supported by frame-to-frame tracking through time in at least one view and stereo matching across two views, and wherein when a distance between the at least an object and a second moving object falls below a threshold distance the second object is removed from consideration on an assumption that trackers tracking the at least an object and the second moving object are tracking a single object; a seeding component that iteratively seeds the tracking component with object hypotheses based upon the objects that are tracked; a filtering component that selectively removes one or more of the tracked objects and corresponding object hypothesis from the set of object hypotheses in accordance with predetermined criteria; and an interpreting component that interprets object characteristics of the at least an tracked object and causes a command to be executed in response thereto; an input system for receiving user input separately or in combination with the object processing system; and a presentation system for presenting information to the user in response to at least one of the command being executed and receiving user input via the input system. 27. The computer system of claim 25 , the engagement volume automatically positioned proximate to the user as the user roams.