Graph-to-Graph: Towards Accurate and Interpretable Online Handwritten Mathematical Expression Recognition. | |
Jin-Wen Wu1,2; Fei Yin2; Yan-Ming Zhang2; Xu-Yao Zhang1,2; Cheng-Lin Liu1,2,3 | |
2021-02 | |
会议日期 | 2021-2-2至2021-2-9 |
会议地点 | 线上会议 |
英文摘要 | Recent handwritten mathematical expression recognition (HMER) approaches treat the problem as an image-to-markup generation task where the handwritten formula is translated into a sequence (e.g. LATEX). The encoder-decoder framework is widely used to solve this image-to-sequence problem. However, (i) for structured mathematical formula, the hierarchical structure neither in the formula nor in the markup has been explored adequately. In addition, (ii) existing image-to-markup methods could not explicitly segment mathematical symbols in the formula corresponding to each target markup token. In this paper, we address the above issues by formulating the HMER as a graph-to-graph (G2G) learning problem. Graph is more flexible and general for structure representation and learning compared with image or sequence. At the core of our method lies the embedding of input formula and output markup into graphs on primitives, with Graph Neural Networks (GNN) to explore the structural information, and a novel sub-graph attention mechanism to match primitives in the input and output graphs. We conduct extensive experiments on CROHME datasets to demonstrate the benefits of the proposed G2G model. Our method yields significant improvements over previous SOTA image-to-markup systems. Moreover, it explicitly resolves the symbol segmentation problem while still being trained end-to-end, making the whole system much more accurate and interpretable. |
内容类型 | 会议论文 |
源URL | [http://ir.ia.ac.cn/handle/173211/46637] |
专题 | 自动化研究所_模式识别国家重点实验室_模式分析与学习团队 |
通讯作者 | Jin-Wen Wu |
作者单位 | 1.School of Artificial Intelligence, University of Chinese Academy of Sciences 2.National Laboratory of Pattern Recognition, Institute of Automation of Chinese Academy of Sciences 3.CAS Center for Excellence of Brain Science and Intelligence Technology |
推荐引用方式 GB/T 7714 | Jin-Wen Wu,Fei Yin,Yan-Ming Zhang,et al. Graph-to-Graph: Towards Accurate and Interpretable Online Handwritten Mathematical Expression Recognition.[C]. 见:. 线上会议. 2021-2-2至2021-2-9. |
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