  In order to make 3D fingerprints compatible with traditional 2D flat
fingerprints, a common practice is to unfold the 3D fingerprint into a 2D
rolled fingerprint, which is then matched with the flat fingerprints by
traditional 2D fingerprint recognition algorithms. The problem with this method
is that there may be large elastic deformation between the unfolded rolled
fingerprint and flat fingerprint, which affects the recognition rate. In this
paper, we propose a pose-specific 3D fingerprint unfolding algorithm to unfold
the 3D fingerprint using the same pose as the flat fingerprint. Our experiments
show that the proposed unfolding algorithm improves the compatibility between
3D fingerprint and flat fingerprint and thus leads to higher genuine matching
scores.
