2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR) (2016)
Las Vegas, NV, United States
June 27, 2016 to June 30, 2016
DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/CVPR.2016.293
In this work we introduce a fully end-to-end approach for action detection in videos that learns to directly predict the temporal bounds of actions. Our intuition is that the process of detecting actions is naturally one of observation and refinement: observing moments in video, and refining hypotheses about when an action is occurring. Based on this insight, we formulate our model as a recurrent neural network-based agent that interacts with a video over time. The agent observes video frames and decides both where to look next and when to emit a prediction. Since backpropagation is not adequate in this non-differentiable setting, we use REINFORCE to learn the agent's decision policy. Our model achieves state-of-the-art results on the THUMOS'14 and ActivityNet datasets while observing only a fraction (2% or less) of the video frames.
Videos, Backpropagation, Training, Feature extraction, Computer vision, Computational modeling, Sports equipment
Serena Yeung, Olga Russakovsky, Greg Mori, Li Fei-Fei, "End-to-End Learning of Action Detection from Frame Glimpses in Videos", 2016 IEEE Conference on Computer Vision and Pattern Recognition (CVPR), vol. 00, no. , pp. 2678-2687, 2016, doi:10.1109/CVPR.2016.293