Centroid detection in ophthalmic applications

Iskander, D. Robert, Collins, Michael J., & Davis, Brett A. (2001) Centroid detection in ophthalmic applications. In The 7th Australian and New Zealand Intelligent Information Systems Conference, November, Perth, Australia.


Monochromatic aberrations of the human eye can be objectively measured with an aberroscope or a Hartmann-Shack sensor, which can calculate the wavefront aberrations using displacements in a grid image. These displacements are determined from the centroid locations of the grid points. Often in optometry practice, the acquired images are of low resolution and low intensity. Current methods for detecting centroids in such images are essesntially based on a Canny-Deriche oriented edge-detecting filter. However, its performance has been found to be insufficient in some clinical applications. We propose an alternative method for detecting centroids in grid images based on watershed transformation. The proposed methodology accurately detects the number of grid points for the subsequent estimation of the centroid locations.

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ID Code: 752
Item Type: Conference Paper
Refereed: No
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2001 (please consult author)
Deposited On: 14 Mar 2005 00:00
Last Modified: 09 Jun 2010 12:23

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