Social interactions by visual focus of attention in a three‐dimensional environment. Issue 2 (6th July 2012)

• Record Type: Journal Article
• Authors: Bazzani, L.; Cristani, M.; Tosato, D.; Farenzena, M.; Paggetti, G.; Menegaz, G.; Murino, V.
• Is Part Of: Expert systems. Volume 30:Issue 2(2013)
• Page Start: 115
• Page End: 127
• Publication Date: 2012-07-06
• Subjects: social signal processing -- visual focus of attention -- social interactions -- tracking -- head pose estimation; Expert systems (Computer science); 006.33
• DOI: 10.1111/j.1468-0394.2012.00622.x
• Languages: English
• ISSNs: 0266-4720

Abstract

Abstract: In human behaviour analysis, the visual focus of attention (VFOA) of a person is a very important cue. VFOA detection is difficult, though, especially in a unconstrained and crowded environment, typical of video surveillance scenarios. In this paper, we estimate the VFOA by defining the Subjective View Frustum, which approximates the visual field of a person in a three‐dimensional representation of the scene. This opens up to several intriguing behavioural investigations. In particular, we propose the Inter‐Relation Pattern Matrix, which suggests possible social interactions between the people present in a scene. Theoretical justifications and experimental results substantiate the validity and the goodness of the analysis performed.