Fingerprint enrollment method and apparatus using the same

Abstract

A fingerprint enrollment method and a fingerprint enrollment apparatus are provided. A minutiae feature and a pore feature of a first fingerprint image are extracted to obtain a first template. A minutiae feature and a pore feature of a second fingerprint image are extracted to obtain a second template. A minutiae matching score between the minutiae features of the first template and the minutiae features of the second template is calculated. When the minutiae matching score is between the first threshold and a second threshold, stitching, mosaicking or synthesis of the first template and the second template are performed by utilizing a matching relation between the pore features of the first template and the pore features of the second template and utilizing the matching relation between the minutiae feature of the first template and the minutiae feature of the second template.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The invention relates to a fingerprint recognition technology, and more particularly, to a fingerprint enrollment method and a fingerprint enrollment apparatus.[0003]2. Description of Related Art[0004]Fingerprint recognition is an important part in Biometric Recognition System. Features of the fingerprint can be classified into three levels including level 1, level 2 and level 3. Level 1 refers to overall geometrical forms (overall shapes of line) of the fingerprint which are macroscopically recognized, such as left loop, right loop, double loop and so on. Level 2 refers to features of lines on the fingerprint which are microscopically recognized, such as ending, bifurcation, eye, hook and so on. The features of line are collectively known as minutiae. Level 3 refers to in-depth features of lines on the fingerprint which are microscopically recognized even further, such as pores and so on.[0005]A fingerprint sensor may ...

AI Technical Summary

Benefits of technology

[0007]The invention is directed to a fingerprint enrollment method and a fingerprint enrollment apparatus, which are capable of automatically stitching multiple fingerprint images to enlarge the area of the template during the enrollment, so as to increase the quantity of feature points of the template.

[0010]Based on the above, the fingerprint enrollment method and the fingerprint enrollment apparatus as described in the embodiments of the invention are capable of capturing multiple fingerprint images for the fingerprint enrollment from the same finger by the fingerprint sensor. During the enrollment, the feature stitching circuit of the fingerprint enrollment apparatus can automatically perform the stitching, mosaicking or synthesis of multiple templates corresponding to multiple fingerprint images, so as to enlarge the area of the template to thereby increase the quantity of feature points of the enrolled templates.

Problems solved by technology

However, due to the restrictions in volume / area of the small electronic apparatus, the fingerprint sensor of the small electronic apparatus is generally a small area sensor.

The fingerprint verification may fail frequently if the area of the enrolled fingerprint template is fairly small (i.e., which leads to the small quantity of feature points in a finger template).

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