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Shack–Hartmann centroid detection using the spiral phase transform |
Applied Optics, Vol. 51, Issue 30, pp. 7362-7367 (2012)
http://dx.doi.org/10.1364/AO.51.007362
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Abstract
We present a Shack–Hartmann (SH) centroid detection algorithm capable to measure in presence of strong noise, background illumination and spot modulating signals, which are typical limiting factors of traditional centroid detection algorithms. The proposed method is based on performing a normalization of the SH pattern using the spiral phase transform method and Fourier filtering. The spot centroids are then obtained using global thresholding and weighted average methods. We have tested the algorithm with simulations and experimental data obtaining satisfactory results. A complete MATLAB package that can reproduce all the results can be downloaded from [
© 2012 Optical Society of America
OCIS Codes
(100.0100) Image processing : Image processing
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
ToC Category:
Image Processing
History
Original Manuscript: June 27, 2012
Manuscript Accepted: September 10, 2012
Published: October 18, 2012
Citation
J. Vargas, R. Restrepo, J. C. Estrada, C. O. S. Sorzano, Yong-Zhao Du, and J. M. Carazo, "Shack–Hartmann centroid detection using the spiral phase transform," Appl. Opt. 51, 7362-7367 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-30-7362
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