| 摘要 |
<p>The present invention provides a method for standardizing fingerprint images used in biometric authentication systems. The method having steps of obtaining the fingerprint image and then enhancing the fingerprint image, thereafter, identifying core point on the fingerprint image. After that, identifying axis of symmetry passing through the core point of the fingerprint image. Further, extending a line from the axis of symmetry to touch base for obtaining a base point of the fingerprint image. Furthermore, converting the fingerprint image into binary image followed by skeletonization of the fingerprint image. Thereafter, extracting minutiae features from the thin fingerprint image. Further, removing spurious minutiae feature points and spurious ridges. After that, counting ridges between each of the minutiae features and the core point. Further, calculating angle formed at the core point between the base point and each of the minutiae feature. At last, mapping all the minutiae features on concentric circles having uniform frequency with center as a core point for generating canonical fingerprint image.</p> |
