1. UT Egocentric Dataset, http://vision.cs.utexas.edu/projects/egocentric_data/UT_Egocentric_Dataset.html.
2. Georgia Tech Egocentric Vision Repository, http://cbi.gatech.edu/egocentric/datasets.htm.
3. Serre Lab HMDB: a large human motion database, http://serre-lab.clps.brown.edu/resource/hmdb-a-large-human-motion-database/.
4. Object segmentation by long term analysis of point trajectories;Brox,2010
5. Unsupervised learning by Probabilistic Latent semantic Analysis;Hofmann;Mach. Learn.,2001