めまい診断支援のための小型眼球運動計測システムにおける計測精度の検証

• Published in: Transactions of Japanese Society for Medical and Biological Engineering Vol. 53; no. Supplement; p. S277_01
• Main Authors: 福井, 康裕, 本間, 章彦, 大越, 康晴, 加藤, 綾子, 進藤, 晋, 後藤, 聡史
• Format: Journal Article
• Language: Japanese
• Published: 公益社団法人 日本生体医工学会 2015; Japanese Society for Medical and Biological Engineering
• ISSN: 1347-443X; 1881-4379
• DOI: 10.11239/jsmbe.53.S277_01

Vertigo occurs due to various reasons, therefore an accurate diagnosis is demanded. However, as the rate of occurrence during diagnosis is 40～60%, it is difficult to clearly recognize the disease. Therefore, this study aimed to develop a compact eye movement measurement system that is possible to measure and record the vertigo at home. In this study, the accurate calculation of eye movement was evaluated by the camera that was expected to be mounted. The algorithm of this system analyzes the horizontal and vertical components by tracking the pupil, subsequently extracts and tracks the feature points from the iris pattern in order to analyze the rotation components. As the results of evaluation experiment of images taken by the camera revealed that, the average calculation error of movement amount and rotation amount were 0.04mm and 0.23mm at resolving power of 9.35um/pixel respectively, a strong correlation could be seen. In addition, eye movement is 0.7mm/frame when taken by 30fps, calculation error is the range of 1frame. Based from the results, satisfactory tracking of eye movements is potentially can be performed by the camera.