Application of normalized gray-scale correlation

Mark L. Yee; Brian A. Kast; Fred M. Dickey; K. Terry Stalker

doi:10.1117/12.160328

25 October 1993 Application of normalized gray-scale correlation

Mark L. Yee, Brian A. Kast, Fred M. Dickey, K. Terry Stalker

Proceedings Volume 1959, Optical Pattern Recognition IV; (1993) https://doi.org/10.1117/12.160328
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

Real-time gray-scale correlation in the spatial domain has been demonstrated previously using an acousto-optical (AO) correlator. This work demonstrates normalized gray-scale correlation as implemented on an AO correlator system capable of operating at real-time video rates. Motivation for using normalized gray-scale correlation is presented. The normalized correlation algorithm as implemented on the AO correlator is detailed. The entire real-time AO correlator system is described, including the electronic support hardware and the user interface. Since normalization requires a division operation, system numerical precision issues are addressed. Test results obtained in non-real time experiments are presented.

Citation Download Citation

Mark L. Yee, Brian A. Kast, Fred M. Dickey, and K. Terry Stalker "Application of normalized gray-scale correlation", Proc. SPIE 1959, Optical Pattern Recognition IV, (25 October 1993); https://doi.org/10.1117/12.160328

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