4. The method of claim 3 , wherein applying the shape-based gesture recognition process to the plurality of the video frames of the visual gesture comprises: selecting a video frame of the plurality of the video frames of the video of the visual gesture as a reference frame, the video frame representing a digital color image of the visual gesture at a time instance; applying a general parametric model to the selected video frame of the visual gesture to generate a specific parametric template of the visual gesture; subsequently receiving one or more video frames of the video of the visual gesture, wherein the visual gesture in a subsequently received video frame is the visual gesture at a subsequent time instance; for each subsequently received video frame, detecting a visual contour of the visual gesture based at least in part on the specific parametric template of the visual gesture; and recognizing the visual gesture based at least in part on the detected visual contours.
3. The method of claim 1 , wherein applying the selected visual gesture recognition process comprises: applying a shape-based gesture recognition process to the plurality of the video frames of the visual gesture.