Action recognition in videos using frequency analysis of critical point trajectories

Cyrille Beaudry, Renaud Peteri, Laurent Mascarilla
2014 2014 IEEE International Conference on Image Processing (ICIP)  
This paper focuses on human action recognition in video sequences. A method based on the optical flow estimation is presented, where critical points of the flow field are extracted. Multi-scale trajectories are generated from those points and are characterized in the frequency domain. Finally, a sequence is described by fusing this frequency information with motion orientation and shape information. Experiments show that this method has recognition rates among the highest in the state of the
more » ... on the KTH dataset. Contrary to recent dense sampling strategies, the proposed method only requires critical points of motion flow field, thus permitting a lower computation time and a better sequence description. Results and perspectives are then discussed. Index Terms-Action recognition in videos, critical points, frequency analysis of motion trajectories.
doi:10.1109/icip.2014.7025289 dblp:conf/icip/BeaudryPM14 fatcat:2lmenanrvnhprdsfeqzcwnhgi4