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Automatic Covert Vehicle Recorder

A need exists for a versatile, compact, automatic system that will covertly record vehicle license plates. They cannot be successfully recorded by straight infrared photography. Alternative highly red sensitive recorders of all types reduce the apparent subject contrast below the identification level. An alternate approach making use of a texture enhancing light system is described. The method has been placed in service and has consistently produced covert records of both high and low apparent contrast license plates on vehicles crossing the U.S. border. The design approach used is detailed and the complete system is described.