Published in
Proceedings of the 10th International Conference on Computer Vision Theory and Applications
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Crowd Event Detection in Surveillance Video - An Approach based on Optical Flow High-frequency Feature Analysis:
Proceedings article published in 2015 by
Ana Paula G. S. de Almeida,
Vitor de Azevedo Faria,
De Azevedo Faria,
Flavio de Barros Vidal,
F. De Barros Vidal 
