PRAI*HBA special issue: Social Interactions by Visual Focus of Attention in a Three-Dimensional Environment
Loris Bazzani, Marco Cristani, Diego Tosato, Michela Farenzena, Giulia Paggetti, Vittorio Murino · 2011
In human behavior analysis, the Visual Focus Of Attention (VFOA) of a person is a very important cue. VFOA detection is dicult, though, especially in a unconstrained and crowded environment, typical of video surveillance scenarios. In this paper, we estimate the VFOA by dening the Subjective View Frustum, which approximates the visual eld of a person in a 3D representation of the scene. This opens up to several intriguing behavioral investigations. In particular, we propose the Inter-Relation Pattern Matrix, that suggests possible social interactions between the people present in a scene. Theoretical justications and experimental results substantiate the validity and the goodness of the analysis performed.