1. An image content analysis security system comprising: a pattern generator configured to produce a pattern of non-visible electromagnetic radiation on a wall or floor; a camera configured to perceive the pattern of non-visible electromagnetic radiation, capture images including an object and at least a portion of the pattern, and output captured images as image data; and an image analysis device configured to receive calibration information, receive the image data, determine attributes of the object based on the image data and calibration information.