We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Latent label mining for group activity recognition in basketball videos.
- Authors
Wu, Lifang; Li, Zeyu; Xiang, Ye; Jian, Meng; Shen, Jialie
- Abstract
Motion information has been widely exploited for group activity recognition in sports video. However, in order to model and extract the various motion information between the adjacent frames, existing algorithms only use the coarse video‐level labels as supervision cues. This may lead to the ambiguity of extracted features and the omission of changing rules of motion patterns that are also important sports video recognition. In this paper, a latent label mining strategy for group activity recognition in basketball videos is proposed. The authors' novel strategy allows them to obtain the latent labels set for marking different frames in an unsupervised way, and build the frame‐level and video‐level representations with two separate levels of supervision signal. Firstly, the latent labels of motion patterns are digged using the unsupervised hierarchical clustering technique. The generated latent labels are then taken as the frame‐level supervision signal to train a deep CNN for the frame‐level features extraction. Lastly, the frame‐level features are fed into an LSTM network to build the spatio‐temporal representation for group activity recognition. Experimental results on the public NCAA dataset demonstrate that the proposed algorithm achieves state‐of‐the‐art performance.
- Subjects
HUMAN activity recognition; DATA mining; BASKETBALLS; VIDEO processing; SIGNAL processing
- Publication
IET Image Processing (Wiley-Blackwell), 2021, Vol 15, Issue 14, p3487
- ISSN
1751-9659
- Publication type
Article
- DOI
10.1049/ipr2.12265