1. A method, comprising: receiving from a depth camera a series of depth maps imaging a scene including a human subject, each depth map including a plurality of pixels, each of the plurality of pixels defining a depth of a surface imaged by that pixel; modeling the human subject with a virtual skeleton including a virtual hand joint; mapping a position of the virtual hand joint to a corresponding portion of one or more depth maps in the series of depth maps, the corresponding portion of the one or more depth maps imaging a hand of the human subject modeled by the virtual hand joint; modeling one or more fingers from depth map information of the corresponding portion of one or more depth maps; and interpreting a finger gesture performed by the one or more fingers.