Relaxed Spatio-Temporal Deep Feature Aggregation for Real-Fake Expression Prediction


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Ozkan S., AKAR G.

16th IEEE International Conference on Computer Vision (ICCV), Venice, Italy, 22 - 29 October 2017, pp.3094-3100 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/iccvw.2017.366
  • City: Venice
  • Country: Italy
  • Page Numbers: pp.3094-3100

Abstract

Frame-level visual features are generally aggregated in time with the techniques such as LSTM, Fisher Vectors, NetVLAD etc. to produce a robust video-level representation. We here introduce a learnable aggregation technique whose primary objective is to retain short-time temporal structure between frame-level features and their spatial interdependencies in the representation. Also, it can be easily adapted to the cases where there have very scarce training samples. We evaluate the method on a real-fake expression prediction dataset to demonstrate its superiority. Our method obtains 65% score on the test dataset in the official MAP evaluation and there is only one misclassified decision with the best reported result in the Chalearn Challenge (i.e. 66.7%). Lastly, we believe that this method can be extended to different problems such as action/event recognition in future.