Mr. Miao Xie Profile

Miao Xie

at Shanghai Univ

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SPIE Journal Paper | 17 December 2020

Multi-scale temporal feature-based dense convolutional network for action recognition

Xiaoqiang Li, Miao Xie, Yin Zhang, Jide Li

JEI, Vol. 29, Issue 06, 063013, (December 2020) https://doi.org/10.1117/12.10.1117/1.JEI.29.6.063013

KEYWORDS: Video, RGB color model, Optical flow, Video acceleration, Network architectures, Convolution, Image classification, 3D modeling, Video processing, Lithium

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We propose a network structure for action recognition that is capable of extracting multi-scale temporal representations of actions. The key of the network is to combine a multi-scale temporal pooling module with a dense connection module, called multi-scale temporal pooling dense convolutional network (MTPDNet). The multi-scale temporal pooling module consists of multiple temporal scale levels. At each scale level, video frames are divided into several segments and a pooling operation is then performed on each segment to get temporal pooling information. The number of segments is set differently at different time scale levels, aiming to obtain multi-scale temporal pooling information. In addition, at each scale level, we adopt a redesigned dense connection module to learn motion representations from temporal pooling information. Finally, predictions are independently made at each scale level and the class scores of each scale level are fused to get the final prediction scores. Experimental results on two standard datasets, UCF101 and HMDB51, demonstrate that MTPDNet gets comparable or even better results among leading methods, which proves the effectiveness of the strategy combining multi-scale temporal pooling and dense connection.

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