1. An information processing device that monitors a monitoring object, comprising: a location information database that associates the vertical and horizontal position of image data captured by a fixed camera with actual location information corresponding to the position; a monitoring object judgment unit that judges whether or not the monitoring object is imaged in the image data; and a location information output unit that outputs actual location information corresponding to the position of the image data to which the monitoring object is imaged, based on the location information database if the monitoring object is judged to be imaged.