MGDoc: Pre-training with Multi-granular Hierarchy for Document Image Understanding Zilong Wang author Jiuxiang Gu author Chris Tensmeyer author Nikolaos Barmpalios author Ani Nenkova author Tong Sun author Jingbo Shang author Vlad Morariu author 2022-12 text Proceedings of the 2022 Conference on Empirical Methods in Natural Language Processing Yoav Goldberg editor Zornitsa Kozareva editor Yue Zhang editor Association for Computational Linguistics Abu Dhabi, United Arab Emirates conference publication wang-etal-2022-mgdoc 10.18653/v1/2022.emnlp-main.265 https://aclanthology.org/2022.emnlp-main.265/ 2022-12 3984 3993