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• W2787493796 abstract "Activity detection is a fundamental problem in computer vision. Detecting activities of different temporal scales is particularly challenging. In this paper, we propose the contextual multi-scale region convolutional 3D network (CMS-RC3D) for activity detection. To deal with the inherent temporal scale variability of activity instances, the temporal feature pyramid is used to represent activities of different temporal scales. On each level of the temporal feature pyramid, an activity proposal detector and an activity classifier are learned to detect activities of specific temporal scales. Temporal contextual information is fused into activity classifiers for better recognition. More importantly, the entire model at all levels can be trained end-to-end. Our CMS-RC3D detector can deal with activities at all temporal scale ranges with only a single pass through the backbone network. We test our detector on two public activity detection benchmarks, THUMOS14 and ActivityNet. Extensive experiments show that the proposed CMS-RC3D detector outperforms state-of-the-art methods on THUMOS14 by a substantial margin and achieves comparable results on ActivityNet despite using a shallow feature extractor." @default.
• W2787493796 created "2018-02-23" @default.
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• W2787493796 date "2018-01-28" @default.
• W2787493796 modified "2023-10-18" @default.
• W2787493796 title "Contextual Multi-Scale Region Convolutional 3D Network for Activity Detection" @default.
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• W2787493796 doi "https://doi.org/10.48550/arxiv.1801.09184" @default.
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