Improved dense trajectories for action recognition based on random projection and Fisher vectors

Shihui Ai; Tongwei Lu; Yudian Xiong

doi:10.1117/12.2285510

8 March 2018 Improved dense trajectories for action recognition based on random projection and Fisher vectors

Shihui Ai, Tongwei Lu, Yudian Xiong

Proceedings Volume 10609, MIPPR 2017: Pattern Recognition and Computer Vision; 1060915 (2018) https://doi.org/10.1117/12.2285510
Event: Tenth International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2017), 2017, Xiangyang, China

Abstract

As an important application of intelligent monitoring system, the action recognition in video has become a very important research area of computer vision. In order to improve the accuracy rate of the action recognition in video with improved dense trajectories, one advanced vector method is introduced. Improved dense trajectories combine Fisher Vector with Random Projection. The method realizes the reduction of the characteristic trajectory though projecting the high-dimensional trajectory descriptor into the low-dimensional subspace based on defining and analyzing Gaussian mixture model by Random Projection. And a GMM-FV hybrid model is introduced to encode the trajectory feature vector and reduce dimension. The computational complexity is reduced by Random Projection which can drop Fisher coding vector. Finally, a Linear SVM is used to classifier to predict labels. We tested the algorithm in UCF101 dataset and KTH dataset. Compared with existed some others algorithm, the result showed that the method not only reduce the computational complexity but also improved the accuracy of action recognition.

Citation Download Citation

Shihui Ai, Tongwei Lu, and Yudian Xiong "Improved dense trajectories for action recognition based on random projection and Fisher vectors", Proc. SPIE 10609, MIPPR 2017: Pattern Recognition and Computer Vision, 1060915 (8 March 2018); https://doi.org/10.1117/12.2285510

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