Joseph D. Akinyemi

Work place: Department of Computer Science, University of York, YO10 5DD, Heslington, United Kingdom

E-mail: joseph.akinyemi@york.ac.uk

Website: https://orcid.org/0000-0003-3121-4231

Research Interests:

Biography

Joseph D. Akinyemi is currently with the University of York, York, United Kingdom. He received his Bachelor’s degree in Computer Science from the University of Ilorin, Ilorin, Nigeria in 2010. He received his Master’s degree in Computer Science from the University of Ibadan, Ibadan, Nigeria, in 2014 and a Ph.D. degree in Computer Science from the same institution in 2020. His research spans areas of Computer Vision such as facial and medical image processing as well as aspects of Natural Language Processing such as Sentiment Analysis. He is a 2022 Heidelberg Laureate Forum Fellow in Germany, a recipient of the Google Developers Machine Learning Bootcamp sponsorship for Sub-Saharan Africa and a member of the ACM.

Author Articles
Racial Bias in Facial Expression Recognition Datasets: Evaluating the Impact on Model Performance

By Ridwan O. Bello Joseph D. Akinyemi Khadijat T. Ladoja Oladeji P. Akomolafe

DOI: https://doi.org/10.5815/ijem.2025.01.01, Pub. Date: 8 Feb. 2025

Despite extensive research efforts in Facial Expression Recognition (FER), achieving consistent performance across diverse datasets remains challenging. This challenge stems from variations in imaging conditions such as head pose, illumination, and background, as well as demographic factors like age, gender, and ethnicity. This paper introduces NIFER, a novel facial expression database designed to address this issue by enhancing racial diversity in existing datasets. NIFER comprises 3,481 images primarily featuring individuals with dark skin tones, collected in real-world settings. These images underwent preprocessing through face detection and histogram equalization before being categorized into five basic facial expressions using a deep learning model. Experiments conducted on both NIFER and FER-2013 datasets revealed a decrease in performance in multiracial FER compared to single-race FER, underscoring the importance of incorporating diverse racial representations in FER datasets to ensure accurate recognition across various ethnicities.

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