关键词: 指纹, 指纹图像, 奇异点, Poincare Index

Abstract: The singular points of fingerprint image carry important information. Because the central points are very close to the triangle points in some tented arch fingerprints, the computed Poincare Index values counteract each other approximately to the point of 0. Then, Poincare Index method will label this fingerprint image as arch image. Concerning this problem, Poincare Index method was improved by proposing a new detection and computation method of singular points or reference points. The experimental results show that this method can overcome the limitation mentioned above.

Key words: fingerprint, fingerprint image, singular point, Poincare Index