Illumination-Aware Contactless Fingerprint Spoof Detection via Paired Flash-Non-Flash Imaging
Contactless fingerprint recognition enables hygienic and convenient biometric authentication but poses new challenges for spoof detection due to the absence of physical contact and traditional liveness cues. Most existing methods rely on single-image acquisition and appearance-based features, which often generalize poorly across devices, capture conditions, and spoof materials. In this work, we study paired flash-non-flash contactless fingerprint acquisition as a lightweight active sensing mechanism for spoof detection. Through a preliminary empirical analysis, we show that flash illumination accentuates material- and structure-dependent properties, including ridge visibility, subsurface ...
| Authors | Roja Sahoo, Anoop Namboodiri |
|---|---|
| Primary category | cs.CV |
| Published | 18 March 2026 |
| Last updated at source | 5 May 2026 |
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