Hu, Yiqing, Yan Zheng, Hao Liu, Dequang Jiang, Yinsong Liu, and Bo Ren. “Accurate Structured-Text Spotting for Arithmetical Exercise Correction”. Proceedings of the AAAI Conference on Artificial Intelligence 34, no. 01 (April 3, 2020): 686-693. Accessed April 16, 2024. https://ojs.aaai.org/index.php/AAAI/article/view/5410.