Pair-Activity Analysis from Video Using Qualitative Trajectory Calculus

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dc.contributor.authorAlzoubi, A
dc.contributor.authorAl-Diri, B
dc.contributor.authorPike, T
dc.contributor.authorKleinhappel, T
dc.contributor.authorDickinson, P
dc.date.accessioned2017-07-19T14:01:16Z
dc.date.available2017-07-19T14:01:16Z
dc.date.issued2017-05-08
dc.description.abstractThe automated analysis of interacting objects or people from video has many uses, including the recognition of activities, and identification of prototypical or unusual behaviors. Existing techniques generally use temporal sequences of quantifiable real-valued features, such as object position or orientation; however, more recently, qualitative representations have been proposed. In this paper we present a novel and robust qualitative method which can be used both for classification and clustering of pair-activities. We use Qualitative Trajectory Calculus (QTC) to represent the relative motion between two objects, and encodes their interactions as a trajectory of QTC states. A key element is a general and robust means of determining the sequence similarity, which we term Normalized Weighted Sequence Alignment; we show that this is an effective metric for both recognition and clustering problems. We have evaluated our method across three different datasets, and shown that it out-performs state of the art quantitative methods, achieving an error rate of no more than 4.1% for recognition, and cluster purities higher than 90%. Our motivation originates from an interest in automated analysis of animal behaviors, and we present a comprehensive video dataset of fish behaviors (Gasterosteus aculeatus), collected from lab-based experimentsen_UK
dc.identifier.citationAlZoubi A, Al-Diri B, Pike T, Kleinhappel T, et al., (2018) Pair-activity analysis from video using Qualitative Trajectory Calculus. IEEE Transactions on Circuits and Systems for Video Technology, Volume 28, Issue 8, August 2018, pp. 1850-1863en_UK
dc.identifier.urihttps://doi.org/10.1109/TCSVT.2017.2701860
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/12214
dc.language.isoenen_UK
dc.publisherIEEEen_UK
dc.rightsAttribution-NonCommercial 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.titlePair-Activity Analysis from Video Using Qualitative Trajectory Calculusen_UK
dc.typeArticleen_UK

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