| 고속카메라를 이용한 눈깜박임 분석 |
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이운희, 서종모, 황정민 |
서울대학교 공과대학 전기·정보공학부1,
서울대학교 의과대학 안과학교실2,
서울대학교 의과대학 분당서울대학교병원 안과학교실3 |
| Analysis of Eye Blinking with High-Speed Camera |
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Woon Hee Lee, Jong Mo Seo, Jeong Min Hwang |
Department of Electrical and Computer Engineering, Seoul National University College of Engineering1, Seoul, Korea
Department of Ophthalmology, Seoul National University College of Medicine2, Seoul, Korea
Department of Ophthalmology, Seoul National University Bundang Hospital, Seoul National University College of Medicine3, Seongnam, Korea |
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Received: 5 October 2014 • Revised: 1 November 2014 • Accepted: 5 November 2014 |
| Abstract |
Purpose: A new method for analyzing eye blinking pattern using high-speed camera without a headrest and additional illuminations other than room light was proposed.
Methods: Video clips of the area around an eye with a rectangular-shaped marker (0.5 cm x 1.27 cm) attached under the eye were taken at 240 frames per second. Eye blinking sequences were extracted from the whole video clip and images were aligned by the marker. Shapes and positions of upper eyelid were detected and visualized in three-dimensional graph to be understood easily. Eye blinking cycle was divided into three phases such as ‘Closing phase’, ‘Closed phase’, and ‘Opening phase’ and characteristics of eye blinking were analyzed.
Results: By the proposed method, various experiments were performed with volunteers. Parameters of eye blinking were calculated by analyzing the intensity profile of binary images, and eye blinking patterns were analyzed according to the change of the eyelid position.
Conclusions: Eye blinking patterns are classified by blinking parameters and eyelid position graph. Further studies are needed to apply the proposed method. |
| Key Words:
Blinking rate, Eye blinking, Eye blinking duration, Eyelid position |
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