TV Symbol Recognition Based on Improved Chamfer Matching

(Abstract )The real-time of existing TV symbol recognition method based on streaming video processing is not good, and has a bad result of recognition to semitransparent one. In order to solve this problem, this paper proposes a recognition method of TV symbol based on improved Chamfer matching. It extracts the TV symbol color and edge gradient direction to represent the shape of it by Canny operator, and uses RANSAC algorithm to optimize and fit the edge. It computes the distance image of edge gradient direction by distance transformation, and identification is based on the principle of shortest distance. Experimental results show that the method can realize the recognition of TV symbol in a single frame and overcomes the difficulty of the recognition of semitransparent TV symbol, while its recognition rate is 97.7% and average recognition time is 801 ms. (Key words ) ) ) )TV symbol recognition; Chamfer matching; distance transformation; edge color; gradient direction

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