Training Artificial Neural Network Using MR Images for Visual Axes Estimation during Sleep
Estimation of visual axis during sleep has been attracting a considerable attention. A simultaneous measurement system composed of functional MRI and infrared-video has been developed to investigate a relationship between eye-movement and brain function during sleep. Although there are some methods for measuring visual axis of opening eyes from video images, they cannot be applied to estimate visual axis of closing eyes during sleep. This paper proposes a method based on artificial neural network (ANN) for estimating visual axes during sleep from infrared-video images. Also, this paper introduces a novel calibration method using MRI. The method takes structural MR images of the eyeball and detects the visual axes from the MR images. And, using the detected visual axes and the simultaneously taken infrared-video image, the ANN is trained. The experimental results showed that the proposed method detected visual axes of the right and the left eyes with errors of 1.32±4.24 (RMSE±SD) deg and 1.26±4.20 deg, respectively.
Yuji Yahata Syoji Kobashi Shigeyuki Kan Masaya Misaki Katsuya Kondo Satoru Miyauchi Yutaka Hata
Graduate School of Engineering, University of Hyogo Kobe Advanced ICT Research Center, National Institute of Information and Communications Technology;G Kobe Advanced ICT Research Center, National Institute of Information and Communications Technology;J Kobe Advanced ICT Research Center, National Institute of Information and Communications Technology Kobe Advanced ICT Research Center, National Institute of Information and Communications Technology;C
国际会议
北京
英文
443-448
2007-05-23（万方平台首次上网日期，不代表论文的发表时间）