1. A method for calculating a set of media effectiveness ratings for a plurality of out-of-home media presentations, comprising the following steps: (a) presenting, by a digital media network, an out-of-home media presentation (b) capturing, by a plurality of vision processing units operating in coordination with a central server, a plurality of input images of people in the vicinity of the out-of-home media presentation, wherein each vision processing unit comprises a means for controlling, means for processing, means for video interface, and a plurality of means for capturing images, (c) determining, by the plurality of vision processing units operating in coordination with a central server, path data of each person in the vicinity of the out-of-home media presentation including initial point, destination point, global trip, trip time, dwell time and average velocity, (d) determining, by the plurality of vision processing units operating in coordination with a central server, behavior data including an amount of time each person in the vicinity of the out-of-home media presentation spends viewing and not viewing the out-of-home media presentation while in the vicinity of the out-of-home media presentation, (e) determining, by the plurality of vision processing units operating in coordination with a central server, estimated demographic data of each person in the vicinity of the out-of-home media presentation including gender, age and ethnicity by applying at least a computer vision based demographic classification algorithm to the plurality of input images of the people in the vicinity of the out-of-home media presentation, (f) aggregating, by the central server, total characteristic data of the out-of-home media presentation including the path data, the behavior data and the estimated demographic data of each person in the vicinity of the out-of-home media presentation based on one or more visits of each person to a predefined area in the vicinity of the out-of-home media presentation (g) calculating, by the central server, the set of media effectiveness ratings including opportunity to see, gross rating points, cost per thousand gross impressions, engagement and impression duration based on the total characteristic data of the out-of-home media presentation, (h) repeating steps (a) thru (g) for one or more additional out-of-home media presentations (i) comparing, by the central server, the respective set of media effectiveness ratings of each of the out-of-home media presentations.