Patent ID: 11874907
Assignee: ARCSOFT CORPORATION LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 7:
8. A method for identifying a fingerprint, comprising:
performing enhancement processing on a collected fingerprint image of a current frame to obtain an enhanced fingerprint image, wherein the enhancement processing comprises: eliminating a background texture of the fingerprint image of the current frame to obtain a pure fingerprint image;
performing feature extraction on the enhanced fingerprint image to obtain feature data; and
identifying the fingerprint according to comparison of the feature data with feature data of a fingerprint template;
wherein when the enhanced fingerprint image is a distorted fingerprint image, the method further comprising: performing the distortion correction on the distorted fingerprint image comprises; wherein performing the distortion correction on the distorted fingerprint image comprises: extracting a direction field and a periodic diagram of the distorted fingerprint image; searching for according to the direction field and the periodic diagram, a reference distorted fingerprint in a database set, closest to the distorted fingerprint image; and performing inverse transformation correction on the distorted fingerprint image according to the reference distorted fingerprint.