Research And Implementation Of Feature Extraction Based On Offline Handwritten Chinese Recognition

Chinese character recognition is automatically recognizing Chinese characters printed or written on paper with the help of computer. It is pertain to pattern recognition and artificial intelligence. It deals with pattern recognition, image processing, artificial intelligence,formal language and automata,fuzzy mathematics, compounding mathematics,informatics, Chinese information processing, as well as linguistics,psychology,bionics. It is a universal technology.Chinese character recognition is a kind of pattern recognition with great difficulty. On one hand,Chinese characters are a special pattern set,which has many patterns,complicated structures. Some patterns are very alike. Poor quality of printing,impact of voice,and irregular shape of written characters make their recognition even more difficult.Firstly, preprocessing plays an important role in handwritten Chinese character recognition. In the step of preprocessing, traditional thresholding, smoothing is implemented. In addition, a modified nonlinear normalization method based on density equalization of the exact area is implemented, which narrows the difference within the same class, compared with other normalization method. As a result, the recognition rate is increased greatly.A fuzzy sub-stroke extraction method is proposed to resolve the unsteadiness because of the unconstrained written fashion. First calculating the attribution feature of boundary point related to the four fuzzy sub-strokes—horizontal,vertical,left diagonal and right diagonal, then combing fuzzy mesh with fuzzy sub-stroke attribution feature of boundary points to obtain the fuzzy sub-stroke statistical feature of a Chinese character.In addition, an approach of block feature and its related fuzzy feature based on elastic mesh is presented. The method simulates the mechanism when people recognizing Chinese character. It is an effective method, especially being good at recognizing handwritten Chinese character which is written in different style, with great distortion.Finally, a practical processing system of paper check developed by us is introduced including the applying environment,primary function and the main technology used in the system.My main job is to process the painting answer area and use the methods presented in this paper to recognize the name character.