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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 1 — Feb. 4, 2013

Resolution limits to object tracking with subpixel accuracy

David Mas, Belen Ferrer, John T. Sheridan, and Julian Espinosa  »View Author Affiliations

Optics Letters, Vol. 37, Issue 23, pp. 4877-4879 (2012)

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Subpixel methods increase the accuracy and efficiency of image detectors, processing units, and algorithms and provide very cost-effective systems for object tracking. Published methods achieve resolution increases up to three orders of magnitude. In this Letter, we demonstrate that this limit can be theoretically improved by several orders of magnitude, permitting micropixel and submicropixel accuracies. The necessary condition for movement detection is that one single pixel changes its status. We show that an appropriate target design increases the probability of a pixel change for arbitrarily small shifts, thus increasing the detection accuracy of a tracking system. The proposal does not impose severe restriction on the target nor on the sensor, thus allowing easy experimental implementation.

© 2012 Optical Society of America

OCIS Codes
(040.1490) Detectors : Cameras
(100.6640) Image processing : Superresolution
(100.4999) Image processing : Pattern recognition, target tracking

ToC Category:
Image Processing

Original Manuscript: October 1, 2012
Revised Manuscript: October 19, 2012
Manuscript Accepted: October 31, 2012
Published: November 22, 2012

Virtual Issues
Vol. 8, Iss. 1 Virtual Journal for Biomedical Optics

David Mas, Belen Ferrer, John T. Sheridan, and Julian Espinosa, "Resolution limits to object tracking with subpixel accuracy," Opt. Lett. 37, 4877-4879 (2012)

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