PMID: 9437553Jan 23, 1998Paper

Algorithm for Purkinje images I and IV and limbus centre localization

Computers in Biology and Medicine
J C BarryW Hillen

Abstract

To develop a fast and reliable image processing algorithm for the extraction of Purkinje reflection data for measurement of ocular alignment with standard PC hardware. Purkinje images I and IV are specular reflections of light sources, the positions of which are proportional to eye rotation. Fast histogram-based thresholding and gradient techniques were used to localize Purkinje images I and IV, the pupil centre and the limbus centre in images obtained with near infrared light. Execution time was 500 ms per eye. A set of 540 images was evaluated of which 94% were automatically analysed.

References

Jul 1, 1995·Vision Research·H J Wyatt
Mar 1, 1996·Klinische Monatsblätter für Augenheilkunde·J C BarryN Hoffmann

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Citations

Jun 10, 2006·IEEE Transactions on Bio-medical Engineering·D Robert Iskander
Sep 21, 2004·IEEE Transactions on Bio-medical Engineering·D Robert IskanderMartin Trunk
Nov 27, 2018·PloS One·Ahmed AbassAhmed Elsheikh
Oct 27, 2017·Advances in Physiology Education·Icilio CaveroHenry H Holzgrefe

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