Almost everything one needs to know about image matching systems

The missile map matching problems for guidance updating or target homing is presented. The problem consists of locating the position of a sensor image relative to a reference map which is stored onboard the vehicle's computer. Once the match location is found the relative location between the two map centers can be used to update the vehicle's navigational position. The two important performance considerations are the avoidance of false fixes as measured by their frequency of occurrence and the accuracy with which the position fix can be made. The overall design and evaluation of map matching systems are described. The layout of a typical system design is presented. The system parameters associated with the reference data, sensor environment and vehicle were integrated to determine a model of the image dynamics. This model used in conjunction with a signature predictor model was used to construct the reference map or set of reference maps to be stored on the vehicle.