Described herein are various technologies pertaining to detecting a vehicle in an image and determining a class of vehicle to which the vehicle belongs. In a general embodiment, the image is output by a radar-based imaging system, such as a synthetic aperture radar (SAR) imaging system. The image is processed to generate a signature for the vehicle, the signature being a one-dimensional array. The class of the vehicle is determined based upon a comparison of the signature for the vehicle with a template signature for the class.
STATEMENT OF GOVERNMENTAL INTEREST
 This invention was developed under Contract DE-AC04-94AL85000 between Sandia Corporation and the U.S. Department of Energy. The U.S. Government has certain rights in this invention.