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• W2968202956 abstract "A classical approach to abnormal activity detection is to learn a representation for normal activities from the training data and then use this learned representation to detect abnormal activities while testing. Typically, the methods based on this approach operate at a fixed timescale - either a single time-instant (eg. frame-based) or a constant time duration (eg. video-clip based). But human abnormal activities can take place at different timescales. For example, jumping is a short term anomaly and loitering is a long term anomaly in a surveillance scenario. A single and pre-defined timescale is not enough to capture the wide range of anomalies occurring with different time duration. In this paper, we propose a multi-timescale model to capture the temporal dynamics at different timescales. In particular, the proposed model makes future and past predictions at different timescales for a given input pose trajectory. The model is multi-layered where intermediate layers are responsible to generate predictions corresponding to different timescales. These predictions are combined to detect abnormal activities. In addition, we also introduce an abnormal activity data-set for research use that contains 4,83,566 annotated frames. Data-set will be made available at this https URL Our experiments show that the proposed model can capture the anomalies of different time duration and outperforms existing methods." @default.
• W2968202956 created "2019-08-22" @default.
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• W2968202956 date "2019-08-12" @default.
• W2968202956 modified "2023-09-27" @default.
• W2968202956 title "Multi-timescale Trajectory Prediction for Abnormal Human Activity Detection." @default.
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