Fingerprint retrieval method based on global directional information

A global direction and fingerprint technology, applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve the problems of being easily affected by noise, and the effective use of global direction information without fingerprints, etc., so as to improve utilization rate, use equality, and improve efficiency effect

Inactive Publication Date: 2019-01-15
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problem of fast fingerprint retrieval. Traditional mainstream fingerprint retrieval methods usually rely on the precise extraction and registration of singular points of fingerprints to construct feature vectors, which are easily affected by noise.
At the same time, considering the deformation of fingerprints, traditional methods generally believe that only the information near the singular point is relatively stable, so only the information near it is collected.
In fact, for a single finger, the information of each part of the fingerprint image (especially the ridge direction information) is important for fast matching, but there is no effective use of the fingerprint global direction information.

Method used

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  • Fingerprint retrieval method based on global directional information
  • Fingerprint retrieval method based on global directional information

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Embodiment Construction

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0052] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientation or position indicated by "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the descrip...

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Abstract

The invention provides a fingerprint retrieval method based on the global direction information. The fingerprint retrieval method comprises the following steps: A, establishing a fingerprint global direction information feature representation model; B, extracting the global direction information of the fingerprint database and the input fingerprint image, using the global direction information feature to represent the model to construct the feature vector, and then performing searching. The method can improve the utilization rate of fingerprint information and the fingerprint retrieval efficiency.

Description

technical field [0001] The invention relates to the field of fingerprint identification, in particular to a fingerprint retrieval method based on global direction information. Background technique [0002] Due to its comprehensive advantages in key indicators such as uniqueness, stability, and ease of collection, fingerprints have always been one of the important features for identity authentication in the field of public security criminal investigation. In recent years, with the gradual maturity of fingerprint automatic identification technology and the rapid development of semiconductor hardware technology, fingerprint identification has been more widely used in immigration management, financial identity authentication, mobile phone identification and other scenarios. [0003] A common fingerprint identification system usually includes a fingerprint authentication subsystem for one-to-one comparison and a fingerprint identification subsystem for one-to-many comparison. In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46G06K9/62
CPCG06V40/1359G06V40/1376G06V10/507G06F18/23213
Inventor 杨霄司轩斌郭振华冯建江夏树涛
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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