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.

翻译：为了使3D指纹与传统2D平面指纹兼容，通常的做法是将3D指纹展开为2D滚动指纹，再通过传统2D指纹识别算法与平面指纹进行匹配。该方法存在的问题是，展开后的滚动指纹与平面指纹之间可能存在较大的弹性形变，从而影响识别率。本文提出一种面向姿态的3D指纹展开算法，采用与平面指纹相同的姿态进行3D指纹展开。实验结果表明，该展开算法提升了3D指纹与平面指纹的兼容性，进而获得更高的真实匹配得分。