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Impact Factor : 8.14

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Paper Title: Analysis of Facial Expressions to Estimate the Level of Engagement in Online Lectures
Authors Name: K.Kavin , Mrs.S.Gowtham , S.Dharvesh Mushraf , N.Arun prakash , S.Sridhar
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IJRTI_203268
Published Paper Id: IJRTI2505003
Published In: Volume 10 Issue 5, May-2025
DOI: https://doi.org/10.56975/ijrti.v10i5.203268
Abstract: Recognizing and enhancing student engagement is crucial for improving learning outcomes, particularly in the context of online classes where monitoring can be challenging. Traditional methods of attendance tracking, such as calling out names, are impractical and susceptible to manipulation in the virtual environment. This project is to develop a novel design using the AI based FFCNN (Face Fiducial Convolution Neural Network) model to capture face biometric randomly from students’ video stream and record their attendance automatically. In the proposed system, the learner’s face is monitored by a video camera while attending a video lecture using light Gradient Boosting Machine (LightGBM) to predict the attention and engagement level of the student by facial feature behavior analysis and random QA system. The present study aimed to develop a method for estimating students’ attentional state from facial expressions during online lectures. We estimated the level of attention while students watched a video lecture by measuring reaction time (RT) to detect a target sound that was irrelevant to the lecture. We assumed that RT to such a stimulus would be longer when participants were focusing on the lecture compared with when they were not. We sought to estimate how much learners focus on a lecture using RT measurement. In the experiment, the learner’s face was recorded by a video camera while watching a video lecture. Facial features were analyzed to predict RT to a task-irrelevant stimulus, which was assumed to be an index of the level of attention. We applied a machine learning method, light Gradient Boosting Machine (LightGBM), to estimate RTs from facial features extracted as action units (AUs) corresponding to facial muscle movements by an open-source software (OpenFace). The model obtained using LightGBM indicated that RTs to the irrelevant stimuli can be estimated from AUs, suggesting that facial expressions are useful for predicting attentional states while watching lectures. We re-analyzed the data while excluding RT data with sleepy faces of the students to test whether decreased general arousal caused by sleepiness was a significant factor in the RT lengthening observed in the experiment. The results were similar regardless of the inclusion of RTs with sleepy faces, indicating that facial expression can be used to predict learners’ level of attention to video lectures.
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Cite Article: "Analysis of Facial Expressions to Estimate the Level of Engagement in Online Lectures", International Journal for Research Trends and Innovation (www.ijrti.org), ISSN:2455-2631, Vol.10, Issue 5, page no.a18-a23, May-2025, Available :http://www.ijrti.org/papers/IJRTI2505003.pdf
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ISSN: 2456-3315 | IMPACT FACTOR: 8.14 Calculated By Google Scholar| ESTD YEAR: 2016
An International Scholarly Open Access Journal, Peer-Reviewed, Refereed Journal Impact Factor 8.14 Calculate by Google Scholar and Semantic Scholar | AI-Powered Research Tool, Multidisciplinary, Monthly, Multilanguage Journal Indexing in All Major Database & Metadata, Citation Generator
Publication Details: Published Paper ID: IJRTI2505003
Registration ID:203268
Published In: Volume 10 Issue 5, May-2025
DOI (Digital Object Identifier): https://doi.org/10.56975/ijrti.v10i5.203268
Page No: a18-a23
Country: tiruppur, Tamil Nadu, India
Research Area: Computer Engineering 
Publisher : IJ Publication
Published Paper URL : https://www.ijrti.org/viewpaperforall?paper=IJRTI2505003
Published Paper PDF: https://www.ijrti.org/papers/IJRTI2505003
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ISSN: 2456-3315
Impact Factor: 8.14 and ISSN APPROVED, Journal Starting Year (ESTD) : 2016

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