Validity-Based Sampling and Smoothing Methods for Multiple Reference Image Captioning Shunta Nagasawa author Yotaro Watanabe author Hitoshi Iyatomi author 2021-06 text Proceedings of the Third Workshop on Multimodal Artificial Intelligence Amir Zadeh editor Louis-Philippe Morency editor Paul Pu Liang editor Candace Ross editor Ruslan Salakhutdinov editor Soujanya Poria editor Erik Cambria editor Kelly Shi editor Association for Computational Linguistics Mexico City, Mexico conference publication nagasawa-etal-2021-validity 10.18653/v1/2021.maiworkshop-1.6 https://aclanthology.org/2021.maiworkshop-1.6/ 2021-06 36 41