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Finger retrieving method base on specific point direction field and fingerprint projection

A direction field, specific point technology, applied in the acquisition/organization of fingerprints/palmprints, instruments, characters and pattern recognition, etc., can solve problems such as difficulty in researching fingerprint retrieval

Inactive Publication Date: 2016-10-12
KUNMING UNIV OF SCI & TECH
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AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a fingerprint retrieval method based on a specific point direction field and fingerprint projection, so as to solve the problem of difficulty in fingerprint retrieval in the prior art, and to solve criminal cases, check on work attendance, keep information secret, Security and other applications can provide strong support

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  • Finger retrieving method base on specific point direction field and fingerprint projection
  • Finger retrieving method base on specific point direction field and fingerprint projection
  • Finger retrieving method base on specific point direction field and fingerprint projection

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Embodiment 1

[0054] Embodiment 1: As shown in Figure 1, a fingerprint retrieval method based on a specific point direction field and fingerprint projection, firstly perform preprocessing operations on the fingerprint image to be matched to segment the fingerprint and find its reliable direction field estimate, and then find the fingerprint The position and direction of the specific point, and then correct the overall direction of the fingerprint, and finally perform fingerprint projection and fingerprint retrieval;

[0055] The specific steps are:

[0056] Step1. Segment the fingerprint image by using the support vector machine;

[0057] Segmenting the fingerprint image by the support vector machine is to use the gray histogram to find the bottom of the double peak as the threshold. After setting the threshold value, the image is then divided into target and background areas;

[0058] Step2. Perform multi-scale smoothing on the direction field of the segmented image to obtain a reliable d...

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Abstract

The invention, which belongs to the field of the fingerprint retrieving technology, relates to a finger retrieving method base on a specific point direction field and fingerprint projection. Pretreatment is carried out on a to-be-matched fingerprint image, fingerprint segmentation is carried out, and reliable direction field estimation is carried out; a position and a direction of a specific point of a fingerprint are found out; the overall direction of the fingerprint is corrected; and then fingerprint projection and fingerprint retrieving are carried out. According to the invention, the feature vector is formed by using the direction field of the specific point and the fingerprint projection technology is combined; and then fingerprint retrieving is carried out. Therefore, the number of to-be-matched fingerprints is reduced effectively.

Description

technical field [0001] The invention relates to a fingerprint retrieval method based on a specific point direction field and fingerprint projection, and belongs to the technical field of fingerprint retrieval. Background technique [0002] Fingerprint has the characteristics of uniqueness, stability and low loss, which make it widely used as an important biological characteristic of human beings in identity authentication. Due to the advantages of easy collection, fingerprints have become the most widely used biometrics. [0003] Due to the widespread use of fingerprints, fingerprint identification technology has become a problem that people continue to explore and study. As a classic pattern recognition problem, fingerprint recognition has been studied for more than 40 years. Although there are some effective fingerprint recognition algorithms, fingerprint recognition is still a problem that has not been completely solved. How to design an accurate, efficient and operable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06K9/00
CPCG06V40/1347G06V40/1365G06V10/507
Inventor 汤宏颖刘舒萍余正涛
Owner KUNMING UNIV OF SCI & TECH
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