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Learning Spatiotemporal Features With 3D Convolutional ...

Learning Spatiotemporal Features with 3D Convolutional NetworksDu Tran1,2, Lubomir Bourdev1, Rob Fergus1, Lorenzo Torresani2, Manohar Paluri11 Facebook AI Research,2 Dartmouth propose a simple, yet effective approach for spa-tiotemporal feature Learning using deep 3-dimensional con-volutional networks (3D ConvNets) trained on a large scalesupervised video dataset. Our findings are three-fold: 1)3D ConvNets are more suitable for Spatiotemporal featurelearning compared to 2D ConvNets; 2) A homogeneous ar-chitecture with small3 3 3convolution kernels in alllayers is among the best performing architectures for 3 DConvNets; and 3) Our learned Features , namely C3D (Con-volutional 3D), with a simple linear classifier outperformstate-of-the-art methods on 4 different benchmarks and arecomparable with current best methods on the other 2 bench-marks.

few years in feature learning, various pre-trained convolu-tional network (ConvNet) models [16] are made available for extracting image features. These features are the activa-tions of the network’s last few fully-connected layers which perform well on …

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