12 January 1993 Tracking speckle patterns with optical correlation
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Proceedings Volume 1772, Optical Information Processing Systems and Architectures IV; (1993); doi: 10.1117/12.140898
Event: San Diego '92, 1992, San Diego, CA, United States
Abstract
It has been shown that tracking small particle motion can be accomplished by tracking the speckle pattern is produces. This paper describes various methods of real-time tracking of speckle patterns obtained from ultrasonic flow imaging of blood and tissue motion using optical correlation. Results obtained from a gray scale joint transform correlator utilizing a twisted nematic liquid crystal spatial light modulator and from Sandia Lab's acousto-optical correlator are presented. The experimental results demonstrate the feasibility of real-time tracking with accuracy comparable to that of template matching algorithms currently being implemented in digital hardware.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Natalie Clark, Michael K. Giles, Sarah H. Harrison, Chris P. Hofer, "Tracking speckle patterns with optical correlation", Proc. SPIE 1772, Optical Information Processing Systems and Architectures IV, (12 January 1993); doi: 10.1117/12.140898; https://doi.org/10.1117/12.140898
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KEYWORDS
Speckle

Speckle pattern

Transducers

Optical correlators

Optical tracking

Ultrasonics

Tissue optics

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