1. A method for vehicle occupancy detection comprising: collecting image data of a vehicle; creating a first value according to a plurality of characteristics of a driver position of said vehicle; creating at least one other value according to a plurality of characteristics of at least one other candidate occupant position in said vehicle; calculating a distance between said first value and said at least one other value in order to determine a vehicle occupancy; determining a threshold distance based on a training set of images wherein said threshold distance is indicative of a passenger in a vehicle; and applying a classifier to said distance between said value and said at least one other value in order to determine if said distance between said first value and said at least one other value is indicative of a passenger in said vehicle.