An On-line Handwritten Arithmetic Expression Recognition System
Jiang Han①; Liu Chang-song①; Li Shi-yang①; Zou Yan-ming②
①State Key Laboratory of Intelligent Technology and Systems, Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China; ②Multimodal Multimedia User Interface, Nokia Research Centre, Beijing 100176, China
Abstract In this paper a complete on-line handwritten arithmetic expression recognition system is introduced. During the process of stroke grouping and symbol recognition, pre-processing strategy and searching procedure are combined to optimize the confidence function. A novel structural analysis algorithm based on symbol ranking is described, and recognition results are stored in trinary trees as the data structure. Experiments show that relatively neatly written expressions with fairly complex structures can be analysed by this algorithm with a high correction rate.
2010, Vol. 32 
