16. The method of claim 1 , further comprising: displaying a co-occurrence of two human faces in said plurality of video frames as a link graph on said electronic display, wherein said link graph includes a plurality of nodes, and wherein each node in said link graph represents a different detected human face in said plurality of video frames regardless of identification status of said detected human face.
16. The method of claim 1 , further comprising: displaying a co-occurrence of two human faces in said plurality of video frames as a link graph on said electronic display, wherein said link graph includes a plurality of nodes, and wherein each node in said link graph represents a different detected human face in said plurality of video frames regardless of identification status of said detected human face. 17. The method of claim 16 , wherein said link graph includes a plurality of dimensionally-weighted links, wherein each link connects a pair of nodes from said plurality of nodes, and wherein weighting of each said link is proportional to the amount of interaction between two humans represented as nodes connected by said link.