Automatic fingerprint identifying technology under verification mode

A fingerprint identification technology and verification mode technology, which is applied in the field of automatic identification of finger fingerprints, can solve the problems of incomplete refinement and low adaptability of fingerprint images, and achieve the effect of ensuring accuracy and eliminating glitches
CN1484189AInactive Publication Date: 2004-03-24NANJING UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING UNIV
Publication Date
2004-03-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a kind of automatic fingerprint recognition technology under confirmation pattern, especially points to the problem that the picture has bifurcation which is not thinned completely and has burrs after the improved OPTA algorithm is thinned. The incomplete thin is caused by incomplete eliminating of template, thus the invention constructs eliminate template and the retention template to process the situation. The burr is generated by the asymmetry of retention template, thus, on base of the 6 retention templates of improved OPTA algorithm, reduces the templates which have upwards, leftwards and rightwards burrs, and eliminates the burrs. The invention also proposes a new method for withdrawing the fingerprint picture direction information with multistage division.
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Description

1. Technical field

[0001] The invention relates to the field of biological identification, in particular to the automatic identification technology of finger prints. 2. Background technology

[0002] Automatic fingerprint identification technology refers to a biometric identification technology that uses the distribution pattern of ridges and valleys on the surface of the finger to confirm the identity of the identified object. Human fingerprints are innate and determined during the fetal period. Human beings have used fingerprints as a means of identification for a long time, and the legitimacy of using fingerprints for identification has long been widely recognized.

[0003] Generally speaking, automatic fingerprint identification technology is divided into verification mode and identification mode. Verification mode is also called 1:1 mode, which is to judge whether you are the person you said; identification mode is also called 1:N mode, which is to judge whether you a...

Claims

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