1. A method, comprising: generating a histogram of a hand associated with a user of a system, wherein the system responds to system interface electronic commands issued by the user using the hand; receiving image data; comparing the image data to the histogram using a tunable process to identify a cluster of hand colored pixels that are most likely a hand region in the image data; computing an outer contour of the cluster of hand colored pixels to identify a portion of the image data that reflects the hand; computing a convex hull for the hand reflected in the identified portion of the image data, wherein the convex hull shows a convexity of contours of the hand; computing a foreshortened bounding box of the convex hull that includes the hand reflected in the identified portion of the image data; analyzing convexity defects associated with the hand within the foreshortened bounding box to identify a pose associated with the hand reflected in the portion of the image data; and if the pose is associated with a system interface electronic command, triggering the system interface electronic command associated with the pose, such that the system performs a function specified by the user.