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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 1, Iss. 1 — Aug. 2, 2010
  • pp: 31–40

Tracking features in retinal images of adaptive optics confocal scanning laser ophthalmoscope using KLT-SIFT algorithm

Hao Li, Jing Lu, Guohua Shi, and Yudong Zhang  »View Author Affiliations


Biomedical Optics Express, Vol. 1, Issue 1, pp. 31-40 (2010)
http://dx.doi.org/10.1364/BOE.1.000031


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Abstract

With the use of adaptive optics (AO), high-resolution microscopic imaging of living human retina in the single cell level has been achieved. In an adaptive optics confocal scanning laser ophthalmoscope (AOSLO) system, with a small field size (about 1 degree, 280 μm), the motion of the eye severely affects the stabilization of the real-time video images and results in significant distortions of the retina images. In this paper, Scale-Invariant Feature Transform (SIFT) is used to abstract stable point features from the retina images. Kanade-Lucas-Tomasi(KLT) algorithm is applied to track the features. With the tracked features, the image distortion in each frame is removed by the second-order polynomial transformation, and 10 successive frames are co-added to enhance the image quality. Features of special interest in an image can also be selected manually and tracked by KLT. A point on a cone is selected manually, and the cone is tracked from frame to frame.

© 2010 OSA

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(180.1790) Microscopy : Confocal microscopy

ToC Category:
Vision, Color, and Visual Optics

History
Original Manuscript: April 28, 2010
Revised Manuscript: June 8, 2010
Manuscript Accepted: June 8, 2010
Published: June 28, 2010

Citation
Hao Li, Jing Lu, Guohua Shi, and Yudong Zhang, "Tracking features in retinal images of adaptive optics confocal scanning laser ophthalmoscope using KLT-SIFT algorithm," Biomed. Opt. Express 1, 31-40 (2010)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-1-1-31


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