1. A system, comprising: a processor; and memory comprising instructions that, when executed by the processor, perform a method comprising: receiving from a stereo camera a real-time stereo video signal comprising paired left and right images of a captured scene, the captured scene comprising a physical foreground object and a physical background; scaling a kernel image associated with the physical foreground object using a first disparity map, the scaling based upon a distance of a portion of the physical foreground object relative to the stereo camera; performing, in real-time, a foreground/background separation algorithm on the real-time stereo video signal, the foreground/background separation algorithm configured to compute differences between portions of the real-time stereo video signal and store the differences as a second disparity map; and comparing the second disparity map to at least a portion of the scaled kernel image to identify pixels of the real-time stereo video signal that represent the physical foreground object.