1. A method for automatically analyzing a category in a physical space based on video-based behavior analysis of a plurality of persons with regard to said category in the physical space, comprising the following steps of: a) capturing a plurality of input images of said plurality of persons by a plurality of means for capturing images in the area with regard to said category, b) processing said plurality of input images in order to process a video-based behavior analysis of each person in said plurality of persons, and c) analyzing the category based on the accumulation of said video-based behavior analysis for said plurality of persons, whereby the analysis of said category facilitates an analysis of level of engagement and decision process at the category level.