GTM: Gray Temporal Model for Video Recognition

• URL: http://arxiv.org/abs/2110.10348v1
• Date: Wed, 20 Oct 2021 02:45:48 GMT
• Title: GTM: Gray Temporal Model for Video Recognition
• Authors: Yanping Zhang, Yongxin Yu
• Abstract summary: We propose a new input modality: gray stream, which can skip the conversion process from video to RGB, but also improve Channel-temporal modeling ability. We also propose a 1D Identity-wise Spatio-temporal Convolution (1D-ICSC) which captures the temporal relationship at channel-feature level within a computation budget.
• Score: 2.534039616389072
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Data input modality plays an important role in video action recognition. Normally, there are three types of input: RGB, flow stream and compressed data. In this paper, we proposed a new input modality: gray stream. Specifically, taken the stacked consecutive 3 gray images as input, which is the same size of RGB, can not only skip the conversion process from video decoding data to RGB, but also improve the spatio-temporal modeling ability at zero computation and zero parameters. Meanwhile, we proposed a 1D Identity Channel-wise Spatio-temporal Convolution(1D-ICSC) which captures the temporal relationship at channel-feature level within a controllable computation budget(by parameters G & R). Finally, we confirm its effectiveness and efficiency on several action recognition benchmarks, such as Kinetics, Something-Something, HMDB-51 and UCF-101, and achieve impressive results.

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