Three-dimensional non-parametric method for limbus detection

Ahmed Abass, Bernardo T Lopes, Ashkan Eliasy, Richard Wu, Steve Jones, John Clamp, Renato Ambrósio and Ahmed Elsheikh

PLOS ONE, 2018, vol. 13, issue 11, 1-13

Abstract: Purpose: To present a novel non-parametric algorithm for detecting the position of the human eye limbus in three dimensions and a new dynamic method for measuring the full 360° visible iris boundary known as white-to-white distance along the eye horizontal line. Methods: The study included 88 participants aged 23 to 65 years (37.7±9.7), 47 females and 41 males. Clinical characteristics, height data and the apex coordinates and 1024×1280 pixel digital images of the eyes were taken by an Eye Surface Profiler and processed by custom-built MATLAB codes. A dynamic light intensity frequency based white-to-white detection process and a novel three-dimensional method for limbus detection is presented. Results: Evidence of significant differences (p

Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0207710

DOI: 10.1371/journal.pone.0207710

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