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arXiv · 1711.11135

Video Captioning via Hierarchical Reinforcement Learning

Xin Wang·Wenhu Chen·Jiawei Wu·Yuan-Fang Wang·William Yang Wang
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Abstract

Video captioning is the task of automatically generating a textual description of the actions in a video. Although previous work (e.g. sequence-to-sequence model) has shown promising results in abstracting a coarse description of a short video, it is still very challenging to caption a video containing multiple fine-grained actions with a detailed description. This paper aims to address the challenge by proposing a novel hierarchical reinforcement learning framework for video captioning, where a high-level Manager module learns to design sub-goals and a low-level Worker module recognizes the primitive actions to fulfill the sub-goal. With this compositional framework to reinforce video captioning at different levels, our approach significantly outperforms all the baseline methods on a newly introduced large-scale dataset for fine-grained video captioning. Furthermore, our non-ensemble model has already achieved the state-of-the-art results on the widely-used MSR-VTT dataset.

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Xin Wang, Wenhu Chen, Jiawei Wu, Yuan-Fang Wang, William Yang Wang. 2018-03-29. Video Captioning via Hierarchical Reinforcement Learning. https://arxiv.org/abs/1711.11135

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