Abstract

Distortion invariant pattern recognition is wanted very much in real circumstances, such as robot vision, target tracking, pattern recognition and so on. Matched filter, also called the Vander Lugt filter, suffering from the requirement for the input object with the same scale size and orientation as the reference pattern, is hard to meet those requirements in the real circumstances. Many improvements, however, have been made on the technique of matched filtering recognition. The factor of scale is the one to which a system of matched filtering recognition is expected to immune.

© 1989 Optical Society of America