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Method for extracting features of palm in non-contact imaging mode

A feature extraction, non-contact technology, applied in character and pattern recognition, instruments, computer parts, etc., to achieve the effect of fast operation

Inactive Publication Date: 2014-02-05
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Realizing palm imaging in a non-contact way can make the hand recognition device recognized among people who are worried about the spread of diseases, but the uncertainty of the position between the hand and the imaging device leads to translation, rotation and scaling of the hand in the image, which is difficult for extracting stable Hand features put forward higher requirements

Method used

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  • Method for extracting features of palm in non-contact imaging mode
  • Method for extracting features of palm in non-contact imaging mode
  • Method for extracting features of palm in non-contact imaging mode

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Embodiment Construction

[0045] Below in conjunction with accompanying drawing and specific embodiment, the present invention will be further described:

[0046] The present invention is a palm feature extraction method in a non-contact imaging mode. , the size, orientation and position of the hand may be different in each hand image collected. The method of the present invention directly extracts features irrelevant to translation, rotation and scaling, which avoids changing some properties of the original image and increasing the running time during the normalization process of the image. The method steps are as follows:

[0047] (1) Selection of palm stability reference points: In order to use the spatial relative positions of each point on the palm vein and main line of the palm print and the palm stability reference point to construct features that are independent of palm rotation, translation and scaling, a palm inscribed circle is constructed To select a stable reference point for the palm; in ...

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Abstract

The invention relates to a method for extracting the features of a palm in a non-contact imaging mode. The method includes the steps that firstly, an incircle of the palm at the roots of fingers is extracted, and a plurality of radial line segments drawn from the incenter are intersected at a circumference; meanwhile, a template is constructed to calculate gradient values of points in the incircle, the relative radius of a center of mass is calculated according to the gradient values of the points on the line segments, the relative radius is defined into a feature parameter, and feature vector space is constructed. The features constructed through the method have the advantages of being unchanged in translation, rotation and scaling and short in feature extraction time.

Description

Technical field: [0001] The invention belongs to the technical field of biological feature recognition, and relates to a palm feature extraction method in a non-contact imaging mode. Background technique: [0002] With the development of the times and the progress of society, the access control system increasingly needs an efficient and reliable identity authentication mechanism to determine the legitimacy of personnel entering and exiting a specific area. technology to identify identity. Because biometric features have the characteristics of "everyone owns, differs from person to person, and remains unchanged for a long time", and will not be forgotten or lost, it is more and more used in access control systems. According to the existing relevant literature, the biometrics currently available for access control systems include fingerprints, palm prints, veins, faces, irises, retinas, and human ears. Hand features are more widely used in many biological features because of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/46
Inventor 李威苑玮琦
Owner SHENYANG POLYTECHNIC UNIV
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