Patent Document ID: 7609853
Application ID: 10538692
Patent Status: 1

Claim One:
1. A method of automatically detecting a composition of an audience of an information presenting device comprising: capturing at least one image of the audience; determining a number of people within the at least one image; and prompting the audience to identify its members if a change in the number of people is detected based on the number of people determined to be within the at least one image, wherein determining the number of people within the at least one image comprises: (a) determining at least one difference image based on at least two captured images; (b) developing at least one shape from the at least one difference image; (c) identifying at least one center of the at least one shape; (d) adding a symbol having a predetermined size and indicative of the at least one center of the at least one shape to a histogram; (e) repeating (a)-(d); and (f) if any symbol in the histogram grows beyond a predetermined threshold, counting that symbol as a person.