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Proceedings Paper

Rapid tracking of a human retina using a nonlinear joint transform correlator
Author(s): Kevin L. Schehrer; M. Gregg Roe; R. A. Dobson
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Paper 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.

Paper Details

Date Published: 25 October 1993
PDF: 10 pages
Proc. SPIE 1959, Optical Pattern Recognition IV, (25 October 1993); doi: 10.1117/12.160309
Show Author Affiliations
Kevin L. Schehrer, Rockwell International Corp./Rocketdyne Div. (United States)
M. Gregg Roe, Rockwell International Corp./Rocketdyne Div. (United States)
R. A. Dobson, Rockwell International Corp./Rocketdyne Div. (United States)


Published in SPIE Proceedings Vol. 1959:
Optical Pattern Recognition IV
David P. Casasent, Editor(s)

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