2-D Phase Demodulation for Deformable Fingerprint Registration

Fingerprint matching with elastic distortion is very challenging to deal with, and severe fingerprint distortion usually leads to false non-matches. This paper proposes a phase-based registration algorithm which can effectively eliminate the distortion between fingerprints and therefore is beneficial to the subsequent fingerprint matching. The key of the proposed algorithm is to reconstruct the distortion field through unwrapping phase difference between two fingerprints. Experiments on FVC2004, Tsinghua distorted fingerprint database, and NIST SD27 demonstrate that our algorithm outperforms other fingerprint registration methods and significantly improves matching accuracy.