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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Stephen A. Burns
  • Vol. 24, Iss. 5 — May. 1, 2007
  • pp: 1358–1363

Automated identification of cone photoreceptors in adaptive optics retinal images

Kaccie Y. Li and Austin Roorda  »View Author Affiliations

JOSA A, Vol. 24, Issue 5, pp. 1358-1363 (2007)

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In making noninvasive measurements of the human cone mosaic, the task of labeling each individual cone is unavoidable. Manual labeling is a time-consuming process, setting the motivation for the development of an automated method. An automated algorithm for labeling cones in adaptive optics (AO) retinal images is implemented and tested on real data. The optical fiber properties of cones aided the design of the algorithm. Out of 2153 manually labeled cones from six different images, the automated method correctly identified 94.1% of them. The agreement between the automated and the manual labeling methods varied from 92.7% to 96.2% across the six images. Results between the two methods disagreed for 1.2% to 9.1% of the cones. Voronoi analysis of large montages of AO retinal images confirmed the general hexagonal-packing structure of retinal cones as well as the general cone density variability across portions of the retina. The consistency of our measurements demonstrates the reliability and practicality of having an automated solution to this problem.

© 2007 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(100.5010) Image processing : Pattern recognition
(330.5310) Vision, color, and visual optics : Vision - photoreceptors

ToC Category:
Image Processing

Original Manuscript: July 26, 2006
Revised Manuscript: October 21, 2006
Manuscript Accepted: October 25, 2006
Published: April 11, 2007

Virtual Issues
Vol. 2, Iss. 6 Virtual Journal for Biomedical Optics

Kaccie Y. Li and Austin Roorda, "Automated identification of cone photoreceptors in adaptive optics retinal images," J. Opt. Soc. Am. A 24, 1358-1363 (2007)

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