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. 2022 Feb 16;12:2650. doi: 10.1038/s41598-022-05810-x

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© The Author(s) 2022

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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The average RMSE and HPD percentage in different PERCLOS intervals. This Figure shows that the proposed method is performing better in higher values of PERCLOS that are more important to detect the moderate and extreme levels of driver drowsiness. Tests with the IDs of 6, 9, and 15 are used as test dataset.