Vine model creating method for finger vein tridimensional characteristic identification

A technology of finger veins and three-dimensional features, applied in character and pattern recognition, instruments, computer components, etc., can solve problems such as vein breakage, burr interference, and difference in vein clarity

Active Publication Date: 2012-07-25
NAT UNIV OF DEFENSE TECH
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AI Technical Summary

Problems solved by technology

The current research on finger vein recognition covers image enhancement, image segmentation, feature extraction and matching, etc., but the above studies only focus on the two-dimensional projection image of finger veins. The main problems are: (1) three-dimensional finger veins The distribution is unique, but finger veins with different three-dimensional distributions may have the same or similar two-dimensional plane projections, which brings hidden dangers to the security of vein recognition; (2) Fingers often have postures such as rotation during registration and authentication Transformation can easily lead to two-dimensional plane projections with large differences in the same fin...

Method used

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  • Vine model creating method for finger vein tridimensional characteristic identification
  • Vine model creating method for finger vein tridimensional characteristic identification
  • Vine model creating method for finger vein tridimensional characteristic identification

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Embodiment Construction

[0072] The invention is a vine model modeling method for three-dimensional feature recognition of finger veins. Firstly, the four principles of uniform pipe diameter, cane classification, node division, and spreading constraints are used to simplify and abstract the spatial structure of finger veins; then the vines are given. The elements, attributes and mathematical description of the model; finally, the data structure of the vine model is used to draw the stereoscopic image of the vein. The specific process is as follows:

[0073] 1. Method for simplifying the spatial structure of finger veins

[0074] 1.1 The principle of uniform pipe diameter

[0075] Differences in caliber are small when major veins are imaged, assuming that the calibers of the major finger veins are the same.

[0076] 1.2 Cane Grading Principles

[0077] The cane grading principle is: from the root of the finger to the tip of the finger, from the palm of the finger to the back of the finger, and count...

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Abstract

The invention relates to a vine model creating method for finger vein tridimensional characteristic identification. The vine model creating method the following steps of: firstly, simplifying and abstracting a finger vein spatial structure according to principles of uniform pipe diameter, graded rattan, node subdivision and extension constraint; and then, providing elements, attributes and mathematical description of a vein model; and finally, drawing a vein stereopicture according to the data structure of the vein model. The finger vein vine model is used for guiding the tridimensional reconstruction to reduce the influences of certain factors, for example, repairing broken veins, eliminating burrs and noise and fitting vein spatial curve; and the method disclosed by the invention can abstract and simplify the complex tridimensional vein spatial structure to facilitate the data organization and characteristic extraction.

Description

technical field [0001] The invention mainly relates to a vine model modeling method for three-dimensional feature recognition of finger veins, and belongs to the technical field of security biometric feature recognition. Background technique [0002] Finger vein recognition is currently a research hotspot in the field of biometric identification. Its main advantage is that veins are hidden inside the finger, which is a living feature, not easy to be forged or stolen, and convenient and safe to collect. The current research on finger vein recognition covers image enhancement, image segmentation, feature extraction and matching, etc., but the above studies only focus on the two-dimensional projection image of finger veins. The main problems are: (1) three-dimensional finger veins The distribution is unique, but finger veins with different three-dimensional distributions may have the same or similar two-dimensional plane projections, which brings hidden dangers to the security ...

Claims

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Application Information

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IPC IPC(8): G06K9/00
Inventor 谢剑斌刘通李沛秦闫玮谢昌颐
Owner NAT UNIV OF DEFENSE TECH
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