Rapid tracking of a human retina using a nonlinear joint transform correlator

Kevin L. Schehrer; M. Gregg Roe; R. A. Dobson

doi:10.1117/12.160309

25 October 1993 Rapid tracking of a human retina using a nonlinear joint transform correlator

Kevin L. Schehrer, M. Gregg Roe, R. A. Dobson

Proceedings Volume 1959, Optical Pattern Recognition IV; (1993) https://doi.org/10.1117/12.160309
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

Experimental results on rapid (2.5 ms, approximately 400 Hz) tracking of a human retina are presented. The optical tracking was implemented with a nonlinear joint transform correlator that used ferroelectric liquid crystal (FLC) spatial light modulators (SLM) at both the input and joint transform planes. The input SLMs were electrically addressed and the joint transform SLM was optically addressed with a photodiode. Realistic images of a human retina were used in a scenario that is directly traceable to surgical applications. For a one hundred image noisy test set, only one false alarm was obtained. The threshold requirements and tracking accuracy were quantified. Hardware improvements that are realizable in the near term (approximately 1 year) are discussed.

Citation Download Citation

Kevin L. Schehrer, M. Gregg Roe, and R. A. Dobson "Rapid tracking of a human retina using a nonlinear joint transform correlator", Proc. SPIE 1959, Optical Pattern Recognition IV, (25 October 1993); https://doi.org/10.1117/12.160309

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