Automatic fingerprint identifying technique under verification mode

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.

Description

1. Technical field

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

[0002] The automatic fingerprint identification method refers to a biometric identification method 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 methods are divided into two types: verification mode and identification mode. The verification mode is also called the 1:1 mode, which is to judge whether you are the person you said; the identification mode is also called the 1:N mode, which is to ju...

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