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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 10 — Apr. 1, 2010
  • pp: B40–B50

What can we learn from the shape of a correlation peak for position estimation?

Abdul Ahad S. Awwal  »View Author Affiliations


Applied Optics, Vol. 49, Issue 10, pp. B40-B50 (2010)
http://dx.doi.org/10.1364/AO.49.000B40


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Abstract

Matched filtering is a robust technique to identify and locate objects in the presence of noise. Traditionally, the amplitude of the correlation peak is used for detection of a match. However, when distinguishing objects that are not significantly different or detecting objects under high noise imaging conditions, the normalized peak amplitude alone may not provide sufficient discrimination. In this paper, we demonstrate that measurements derived from the shape of the correlation peak offer not only higher levels of discrimination but also accurate position estimation. To our knowledge, this is the first time such features have been used in a real-time system, like the National Ignition Facility, where such techniques enable real-time, accurate position estimation and alignment under challenging imaging conditions. It is envisioned that systems utilizing matched filtering will greatly benefit from incorporating additional shape based information.

© 2010 Optical Society of America

OCIS Codes
(070.0070) Fourier optics and signal processing : Fourier optics and signal processing
(070.5010) Fourier optics and signal processing : Pattern recognition
(100.0100) Image processing : Image processing
(100.2000) Image processing : Digital image processing
(100.3008) Image processing : Image recognition, algorithms and filters
(100.4999) Image processing : Pattern recognition, target tracking

History
Original Manuscript: September 3, 2009
Revised Manuscript: January 5, 2010
Manuscript Accepted: January 21, 2010
Published: February 25, 2010

Citation
Abdul Ahad S. Awwal, "What can we learn from the shape of a correlation peak for position estimation?," Appl. Opt. 49, B40-B50 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-10-B40

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