DETECTING A COMPOSITION OF AN AUDIENCE

摘要

The invention is a methods and apparatus for detecting a composition of an audience of an information presentation device. One method captures (18) images of the audience; determines (20) a number of people within the images and prompts (24) the audience to identify its members if a change (22) in th e number of people in the audience is visually detected. This method voids bot h under-sampling of the audience and excessive prompting of the audience by on ly requesting entry of identification data when an audience change occurs. The invention also determines the number of people in an image or series of imag es.