关键词: 数学表达式树, 实时识别, 影响区域定位, 结构分析

Abstract: Mathematical expressions recognition has two main processes. One process is symbol recognition and another process is structural analysis. Most existing approaches do structural analysis after symbol recognition. They can easily fail when symbol identify errors occur. Moreover, they assume the availability of the whole mathematical expression before being able to analyze the semantic information of the expression. To tackle these problems, this paper proposes a real time recognition approach for dynamic recognition of handwritten mathematical expressions. The proposed approach based on a combination of symbol recognition and structural analysis constructs a mathematical expression tree to recognize mathematical expression. In the process of constructing mathematical expression tree, it uses a method of positioning the affected area eliminating duplication of other unaffected regions identification, thus increasing the efficiency of re-identification and having the advantage of allowing disorder input. Experiments show that the approach is able to achieve very good performance results.

Key words: tree of mathematical expression, real-time recognition, positioning the affected area, structural analysis