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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 16 — Jul. 30, 2012
  • pp: 18478–18493

Maximum precision closed-form solution for localizing diffraction-limited spots in noisy images

Joshua D. Larkin and Peter R. Cook  »View Author Affiliations


Optics Express, Vol. 20, Issue 16, pp. 18478-18493 (2012)
http://dx.doi.org/10.1364/OE.20.018478


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Abstract

Super-resolution techniques like PALM and STORM require accurate localization of single fluorophores detected using a CCD. Popular localization algorithms inefficiently assume each photon registered by a pixel can only come from an area in the specimen corresponding to that pixel (not from neighboring areas), before iteratively (slowly) fitting a Gaussian to pixel intensity; they fail with noisy images. We present an alternative; a probability distribution extending over many pixels is assigned to each photon, and independent distributions are joined to describe emitter location. We compare algorithms, and recommend which serves best under different conditions. At low signal-to-noise ratios, ours is 2-fold more precise than others, and 2 orders of magnitude faster; at high ratios, it closely approximates the maximum likelihood estimate.

© 2012 OSA

OCIS Codes
(100.6640) Image processing : Superresolution
(180.2520) Microscopy : Fluorescence microscopy
(100.4999) Image processing : Pattern recognition, target tracking

ToC Category:
Image Processing

History
Original Manuscript: June 8, 2012
Revised Manuscript: July 19, 2012
Manuscript Accepted: July 22, 2012
Published: July 27, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Joshua D. Larkin and Peter R. Cook, "Maximum precision closed-form solution for localizing diffraction-limited spots in noisy images," Opt. Express 20, 18478-18493 (2012)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-20-16-18478


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