Abstract
Objective To establish a measurement method of the percentage of eyelid closure over the pupil over time (PERCLOS) to finely characterize behaviour circadian rhythm. Methods A computer program was designed based on multitask convolutional neural network for the treatment of videos to get PERCLOS quantitative values. 7 volunteers were recruited in this research. The volunteers were asked to face the personal computers and play a simple game for 5 min, doing the test 4 times a day that was just after getting up in the morning, at noon, in the evening and just before going to bed. Their videos were recorded and treated with the computer program to obtain PERCLOS results. The results showed that the PERCLOS values of 6 young persons increased from morning to night in accordance with the circadian rhythm of youth, while an elder female volunteer showed a different circadian rhythm from that of the youth. Conclusions The PERCLOS method for characterization of behaviour circadian rhythm was successfully developed, which would serve as effective tool for circadian rhythm related studies.
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Acknowledgements
We acknowledge the financial support of the Sichuan Science and Technology Program, under grant 2019YFG0390, Safety Foundation of Civil Aviation Administration of China and the Joint Funds of the National Natural Science Foundation of China (No. U1333132).
Compliance with Ethical Standards
The study was approved by the Logistics Department for the Civilian Ethics Committee of the Second Institute of Civil Aviation Administration of China. All subjects who participated in the experiment were provided with and signed an informed consent form. All relevant ethical safeguards have been met with regard to subject protection.
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Gu, Y., Chen, Z., Zhang, J., Zou, G., Ding, P., Deng, W. (2020). A PERCLOS Method for Fine Characterization of Behaviour Circadian Rhythm. In: Long, S., Dhillon, B.S. (eds) Man-Machine-Environment System Engineering. MMESE 2020. Lecture Notes in Electrical Engineering, vol 645. Springer, Singapore. https://doi.org/10.1007/978-981-15-6978-4_30
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DOI: https://doi.org/10.1007/978-981-15-6978-4_30
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