Nonlinear registration for scanned retinal images: application to ocular polarimetry
Applied Optics, Vol. 47, Issue 29, pp. 5341-5347 (2008)
http://dx.doi.org/10.1364/AO.47.005341
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Abstract
Retinal images of approximately 1° of visual field were recorded with a homemade scanning laser ophthalmoscope. The benefit of using a nonlinear registration technique to improve the summation process when averaging frames, rather than a standard approach based on correlation, was assessed. Results suggest that nonlinear methods can surpass linear transformations, allowing improved contrast and more uniform image quality. The importance of this is also demonstrated with specific polarization measurements to determine the degree of polarization across an imaged retinal area. In such a context, where this parameter of polarization is extracted from a combination of registered images, the benefit of the nonlinear method is further increased.
© 2008 Optical Society of America
OCIS Codes
(100.2000) Image processing : Digital image processing
(100.2980) Image processing : Image enhancement
(110.5405) Imaging systems : Polarimetric imaging
(170.5755) Medical optics and biotechnology : Retina scanning
(330.7327) Vision, color, and visual optics : Visual optics, ophthalmic instrumentation
ToC Category:
Image Processing
History
Original Manuscript: April 8, 2008
Revised Manuscript: August 17, 2008
Manuscript Accepted: September 8, 2008
Published: October 7, 2008
Virtual Issues
Vol. 3, Iss. 12 Virtual Journal for Biomedical Optics
Citation
Vincent Nourrit, Juan M. Bueno, Brian Vohnsen, and Pablo Artal, "Nonlinear registration for scanned retinal images: application to ocular polarimetry," Appl. Opt. 47, 5341-5347 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-29-5341
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