12. The gesture recognition system according to claim 1 , wherein in template matching, a similarity between the gesture template and the edge part is obtained by using a distance transform (DT) technology.
12. The gesture recognition system according to claim 1 , wherein in template matching, a similarity between the gesture template and the edge part is obtained by using a distance transform (DT) technology. 13. The gesture recognition system according to claim 12 , wherein the DT technology performs a DT operation on the edge part to produce a DT image, and searches each position in the DT image by using the gesture template, then performs a convolution operation on the gesture template and the DT image at each of the search positions to generate an approximate value representing a similarity between the gesture template and the DT image, and finds out the gesture template with the smallest approximate value, and finally sends the gesture template with the smallest approximate value to the optimal template selection means.