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David Jardim

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Proceedings Article | 17 March 2017 Paper

Predicting human activities in sequences of actions in RGB-D videos

David Jardim, Luís Nunes, Miguel Dias

Proceedings Volume 10341, 103410C (2017) https://doi.org/10.1117/12.2268524

KEYWORDS: Video, Video surveillance, Feature extraction, Computing systems, Binary data, Sensors, Data modeling, Surveillance systems, Cameras, Detection and tracking algorithms

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In our daily activities we perform prediction or anticipation when interacting with other humans or with objects. Prediction of human activity made by computers has several potential applications: surveillance systems, human computer interfaces, sports video analysis, human-robot-collaboration, games and health-care. We propose a system capable of recognizing and predicting human actions using supervised classifiers trained with automatically labeled data evaluated in our human activity RGB-D dataset (recorded with a Kinect sensor) and using only the position of the main skeleton joints to extract features. Using conditional random fields (CRFs) to model the sequential nature of actions in a sequence has been used before, but where other approaches try to predict an outcome or anticipate ahead in time (seconds), we try to predict what will be the next action of a subject. Our results show an activity prediction accuracy of 89.9% using an automatically labeled dataset.

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