Title :
A method for size estimation of amorphous pupil in 3-dimensional geometry
Author :
Kim, Jieun ; Park, Kyungmo ; Khang, Gon
Author_Institution :
Dept. of Biomed. Eng., Kyunghee Univ., Kyunggi, South Korea
Abstract :
Measuring pupil size is a noninvasive method for evaluation of autonomic nervous system (ANS) activity because the pupil is exclusively controlled by the autonomic nervous system. To evaluate the activity of ANS, an accurate pupil size calculation method different from those of pupillometer and eye tracker should be suggested. This paper presents a three-dimensional model of eye and pupil and also suggests an accurate estimation method of pupil size from images projected on two-dimensional image plane with distortions.
Keywords :
CCD image sensors; biomedical measurement; biomedical optical imaging; eye; neurophysiology; size measurement; 3-dimensional model; amorphous pupil size measurement; autonomic nervous system activity; noninvasive method; pupil size calculation method; two-dimensional CCD image plane; Amorphous materials; Autonomic nervous system; Biomedical engineering; Biomedical measurements; Cameras; Charge coupled devices; Geometry; Lenses; Shape measurement; Size measurement; 3D transformation; Pupil size variability;
Conference_Titel :
Engineering in Medicine and Biology Society, 2004. IEMBS '04. 26th Annual International Conference of the IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-8439-3
DOI :
10.1109/IEMBS.2004.1403448
