Extractive Video Summarizer with Memory Augmented Neural Networks
Litong Feng, Ziyin Li, Zhanghui Kuang, Wayne Zhang · 2018
Online videos have been growing explosively in recent years. How to help human users efficiently browse videos becomes more and more important. Video summarization can automatically shorten a video through extracting key-shots from the raw video, which is helpful for digesting video data. State-of-the-art supervised video summarization algorithms directly learn from manually-created summaries to mimic the key-frame/key-shot selection criterion of humans. Humans usually create a summary after viewing and understanding the whole video, and the global attention mechanism capturing information from all video frames plays a key role in the summarization process. However, previous supervised approaches ignored the temporal relations or simply modeled local inter-dependency across frames. Motivated by this observation, we proposed a memory augmented extractive video summarizer, which utilizes an external memory to record visual information of the whole video with high capacity. With the external memory, the video summarizer simply predicts the importance score of a video shot based on the global understanding of the video frames. The proposed method outperforms previous state-of-the-art algorithms on the public SumMe and TVSum datasets. More importantly, we demonstrate that the global attention modeling has two advantages: good transferring ability across datasets and high robustness to noisy videos.