1. A hand gesture recognition method comprising: obtaining a captured image including an image object, the image object being an image of a hand; generating a numerical signature based on the image object; providing a plurality of reference numerical signatures, the plurality of reference numerical signatures having a plurality of reference hand gestures associated therewith; and identifying one of the plurality of reference numerical signatures as being descriptive of the numerical signature, wherein a hand gesture corresponding to the one of the plurality of reference numerical signatures is attributable to the image of the hand.