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A Lightweight Transformer with Phase-Only Cross-Attention for Illumination-Invariant Biometric Authentication

Created by
  • Haebom

Author

Arun K. Sharma, Shubhobrata Bhattacharya, Motahar Reza, Bishakh Bhattacharya

Outline

To overcome the limitations of existing biometric systems, this paper proposes a lightweight vision transformer (POC-ViT) that utilizes dual biometric features from the forehead and eye area, which are unaffected by face masks or hygiene issues. POC-ViT captures the interdependent structural patterns of the two biometric features using a phase-only mutual attention mechanism. The mutual attention mechanism, computed based on phase correlation, is robust to resolution, intensity, and illumination variations, and its lightweight model makes it suitable for edge device deployment. Experimental results using the FSVP-PBP database, which includes 350 subjects, demonstrate that the proposed POC-ViT achieves a superior classification accuracy of 98.8%, outperforming state-of-the-art methods.

Takeaways, Limitations

Takeaways:
A new approach is presented to overcome the limitations of existing biometric systems (mask wearing, hygiene issues).
High accuracy achieved by utilizing dual biometric features of the forehead and eye area.
Robust performance to illumination and resolution changes through phase-only reciprocal attention mechanism.
Securing edge device deployment potential with lightweight model design.
Achieved high classification accuracy (98.8%).
Limitations:
The database used (FSVP-PBP) was relatively small (350 people).
Generalization performance across different races and age groups needs to be verified.
Further evaluation of durability and stability in real-world environments is needed.
Further comparative analysis with other biometric systems may be needed.
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