Dense event captioning aims to detect and describe all events of interest contained in a video. Despite the advanced development in this area, existing methods tackle this task by making use of dense temporal annotations, which is dramatically source-consuming. This paper formulates a new problem: weakly supervised dense event captioning, which does not require temporal segment annotations for model training. Our solution is based on the one-to-one correspondence assumption, each caption describes one temporal segment, and each temporal segment has one caption, which holds in current benchmark datasets and most real-world cases. We decompose the problem into a pair of dual problems: event captioning and sentence localization and present a cycle system to train our model. Extensive experimental results are provided to demonstrate the ability of our model on both dense event captioning and sentence localization in videos.

本文提出一个无需时间片段注释的方法：针对视频中所有感兴趣事件的稠密描述，基于一一对应的假设，将该问题分解为事件字幕和句子定位的双重问题，并提出了一种循环系统来训练模型。通过大量实验结果证明了该方法在视频事件字幕和句子定位方面的有效性。

视频中弱监督稠密事件字幕生成