Analyzing videos of human activities involves not only recognizing actions (typically based on their appearances), but also determining the story/plot of the video. The storyline of a video describes causal relationships between actions. Beyond recognition of individual actions, discovering causal relationships helps to better understand the semantic meaning of the activities. We present an approach to learn a visually grounded storyline model of videos directly from weakly labeled data. The storyline model is represented as an AND-OR graph, a structure that can compactly encode storyline variation across videos. The edges in the AND-OR graph correspond to causal relationships which are represented in terms of spatio-temporal constraints. We formulate an Integer Programming framework for action recognition and storyline extraction using the storyline model and visual groundings learned from training data.
Understanding videos, constructing plots learning a visually grounded storyline model from annotated videos
A. Gupta,Praveen Srinivasan,Jianbo Shi,L. Davis
Published 2009 in 2009 IEEE Conference on Computer Vision and Pattern Recognition
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- Publication year
2009
- Venue
2009 IEEE Conference on Computer Vision and Pattern Recognition
- Publication date
2009-06-20
- Fields of study
Computer Science
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