System for automatic social network construction from image data

A system (10) for constructing (62) a social network structure from image data. A number of image sensors or cameras (31, 41) may be placed in various areas of a large facility having much throughput of many people, such as an airport. Images from the cameras (31, 41) may indicate an event (65). The event may be activity recognized by video analytics (32) of the system. Video analytics may detect, track and associate people, faces and objects in the images. The analytics (32) may provide activity recognition from images. A dynamic social network may be constructed (62) from information provided by the video analytics (32). Analysis of a constructed social network may reveal further information which can be available for improving dynamic social network construction (62).