FairViT-GAN: A Hybrid Vision Transformer with Adversarial Debiasing for Fair and Explainable Facial Beauty Prediction

• URL: http://arxiv.org/abs/2509.23859v1
• Date: Sun, 28 Sep 2025 12:55:31 GMT
• Title: FairViT-GAN: A Hybrid Vision Transformer with Adversarial Debiasing for Fair and Explainable Facial Beauty Prediction
• Authors: Djamel Eddine Boukhari,
• Abstract summary: We propose textbfFairViT-GAN, a novel hybrid framework for facial beauty prediction.<n>We show that FairViT-GAN sets a new state-of-the-art in predictive accuracy, achieving a Pearson Correlation of textbf0.9230 and reducing RMSE to textbf0.2650.<n>Our analysis reveals a remarkable textbf82.9% reduction in the performance gap between ethnic subgroups, with the adversary's classification accuracy dropping to near-random chance (52.1%)
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Facial Beauty Prediction (FBP) has made significant strides with the application of deep learning, yet state-of-the-art models often exhibit critical limitations, including architectural constraints, inherent demographic biases, and a lack of transparency. Existing methods, primarily based on Convolutional Neural Networks (CNNs), excel at capturing local texture but struggle with global facial harmony, while Vision Transformers (ViTs) effectively model long-range dependencies but can miss fine-grained details. Furthermore, models trained on benchmark datasets can inadvertently learn and perpetuate societal biases related to protected attributes like ethnicity. To address these interconnected challenges, we propose \textbf{FairViT-GAN}, a novel hybrid framework that synergistically integrates a CNN branch for local feature extraction and a ViT branch for global context modeling. More significantly, we introduce an adversarial debiasing mechanism where the feature extractor is explicitly trained to produce representations that are invariant to protected attributes, thereby actively mitigating algorithmic bias. Our framework's transparency is enhanced by visualizing the distinct focus of each architectural branch. Extensive experiments on the SCUT-FBP5500 benchmark demonstrate that FairViT-GAN not only sets a new state-of-the-art in predictive accuracy, achieving a Pearson Correlation of \textbf{0.9230} and reducing RMSE to \textbf{0.2650}, but also excels in fairness. Our analysis reveals a remarkable \textbf{82.9\% reduction in the performance gap} between ethnic subgroups, with the adversary's classification accuracy dropping to near-random chance (52.1\%). We believe FairViT-GAN provides a robust, transparent, and significantly fairer blueprint for developing responsible AI systems for subjective visual assessment.

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