Estimation of centroid positions with a matched-filter algorithm: Relevance for aberrometry of the eye
Optics Express, ISSN: 1094-4087, Vol: 18, Issue: 2, Page: 1197-1206
2010
- 44Citations
- 37Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Metrics Details
- Citations44
- Citation Indexes44
- 44
- CrossRef36
- Captures37
- Readers37
- 37
Article Description
Most Shack-Hartmann based aberrometers use infrared light, for the comfort of the patients. A large amount of the light that is scattered from the retinal layers is recorded by the detector as background, from which it is not trivial to estimate the centroid of the Shack-Hartmann spot. For a centroiding algorithm, background light can lead to a systematic bias of the centroid positions towards the centre of the software window. We implement a matched filter algorithm for the estimation of the centroid positions of the Shack-Hartmann spots recorded by our aberrometer. We briefly present the performance of our algorithm, and recall the well-known robustness of the matched filter algorithm to background light. Using data collected on 5 human eyes, we parameterise a simple and fast centroiding algorithm and reduce the difference between the two algorithms down to a mean residual wavefront of 0.02 μm rms. © 2010 Optical Society of America.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=75249099153&origin=inward; http://dx.doi.org/10.1364/oe.18.001197; http://www.ncbi.nlm.nih.gov/pubmed/20173943; https://www.osapublishing.org/oe/abstract.cfm?uri=oe-18-2-1197; https://www.osapublishing.org/viewmedia.cfm?URI=oe-18-2-1197&seq=0; https://opg.optica.org/oe/abstract.cfm?uri=oe-18-2-1197; https://dx.doi.org/10.1364/oe.18.001197; https://opg.optica.org/oe/fulltext.cfm?uri=oe-18-2-1197&id=194414
The Optical Society
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