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Personalized Feature Translation for Expression Recognition: An Efficient Source-Free Domain Adaptation Method
Created by
Haebom
Author
Masoumeh Sharafi, Soufiane Belharbi, Houssem Ben Salem, Ali Etemad, Alessandro Lameiras Koerich, Marco Pedersoli, Simon Bacon, Eric Granger
Outline
This paper proposes Personalized Feature Transformation (PFT), a novel source-free domain adaptation (SFDA) method that improves the performance of facial expression recognition (FER) models using only unlabeled target data containing only neutral expressions, without source data. While existing SFDA methods require data from various classes, PFT performs feature transformation using only neutral expression data. It utilizes a lightweight transformer operating in latent space to avoid the complexity and noise of image generation and preserves expression information by optimizing the combination of expression consistency and style recognition objectives. Consequently, it reduces computational costs and enables efficient model adaptation.
Takeaways, Limitations
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Takeaways:
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We demonstrate that the performance of the FER model can be improved using only neutral expression data without source data.
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It is more computationally efficient than existing image transformation-based SFDA methods and contributes to solving data privacy and storage space issues.
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Reduce the complexity and noise of image generation through transformations in latent space.
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Limitations:
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Because only neutral expression data is used, there may be limitations in performance improvement compared to methods that use diverse expression data.
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Further research is needed to determine how well the proposed method's performance can generalize to diverse target domain data.
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Additional performance evaluation and validation in real-world applications are required.