Finger identification method used in interactive demonstration system

The invention relates to a finger identification method used in an interactive demonstration system, which is used for determining the operation behavior of a user by means of the identification of fingers on the basis of the camera-projection interactive demonstration system. Based on image processing techniques, the fingers are identified according to the characteristics of finger gesture of a user at the time of drawing by taking geometrically positional information of the finger as main information for identification to analyze and process the images taken by a camera. The entire identification process is completely based on the analysis and the processing of the images without the need that a user wears an additional apparatus for positioning and identifying the finger, thus solving the problems of a plurality of inconveniences owing to the additional apparatus and the like and enhancing the interactivity and human-based property of the interactive demonstration system.