8. A gesture recognition system, comprising: a storage unit storing a plurality of images and a plurality of gesture templates, wherein each gesture template defines a first gesture characteristic and a specific gesture corresponding to the first gesture characteristic; and a processing unit generating a multi-background model according to the images, obtaining at least one object image according to the multi-background model, wherein the object image includes at least an object having a plurality of edges, gathering statistics of the included angles of any two adjacent edges of the object image to obtain a second gesture characteristic corresponding to the object image, comparing the second gesture characteristic of the object image with the first gesture characteristic of each gesture template, and obtaining the specific gesture corresponding to the first gesture characteristic when the second gesture characteristic is similar to the first gesture characteristic.
8. A gesture recognition system, comprising: a storage unit storing a plurality of images and a plurality of gesture templates, wherein each gesture template defines a first gesture characteristic and a specific gesture corresponding to the first gesture characteristic; and a processing unit generating a multi-background model according to the images, obtaining at least one object image according to the multi-background model, wherein the object image includes at least an object having a plurality of edges, gathering statistics of the included angles of any two adjacent edges of the object image to obtain a second gesture characteristic corresponding to the object image, comparing the second gesture characteristic of the object image with the first gesture characteristic of each gesture template, and obtaining the specific gesture corresponding to the first gesture characteristic when the second gesture characteristic is similar to the first gesture characteristic. 13. The system of claim 8 , wherein the second gesture characteristic has a similarity degree with each of the first gesture characteristics, and the highest similarity degree is greater than a predefined threshold.