@article{aheatmapbasedalgorithmforrecognizing,
  title = {A Heat-Map-based Algorithm for Recognizing Group Activities in Videos},
  author = {Weiyao Lin and Hang Chu and Jianxin Wu and Bin Sheng and Zhenzhong Chen},
  year = {2015},
  eprint = {1502.06076},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1502.06076v1},
}