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Computational Intelligence and Neuroscience
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Computational Intelligence and Neuroscience
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2022
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Article
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Fig 14
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Research Article
Learning State Assessment in Online Education Based on Multiple Facial Features Detection
Figure 14
Different mouth states. (a) No open mouth. (b) Normal open mouth. (c) Yawn. (d) Deep yawn.
(a)
(b)
(c)
(d)