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Resolution limits to object tracking with subpixel accuracy |
Optics Letters, Vol. 37, Issue 23, pp. 4877-4879 (2012)
http://dx.doi.org/10.1364/OL.37.004877
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Abstract
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
History
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
Citation
David Mas, Belen Ferrer, John T. Sheridan, and Julian Espinosa, "Resolution limits to object tracking with subpixel accuracy," Opt. Lett. 37, 4877-4879 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-37-23-4877
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