Finger vein feature extraction method

A technology of finger vein features and extraction methods, which is applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve the problems of few features, loss, and small proportions, and achieve the effect of improving stability and accuracy

Inactive Publication Date: 2014-06-25
710TH RES INST OF CHINA SHIPBUILDING IND CORP
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, there is still no better brightness adjustment scheme
[0005] Due to a certain time delay between the infrared light adjustment and the infrared camera image acquisition, the collected single vein image may have local vein features that are not obvious or lost
Moreover, due to the acquisition conditions and the differe

Method used

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  • Finger vein feature extraction method
  • Finger vein feature extraction method
  • Finger vein feature extraction method

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Embodiment Construction

[0038] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0039] The invention provides a method for extracting finger vein features. Under the irradiation of infrared light source, the infrared camera collects the finger vein image. By adjusting the parameters of the infrared light source and infrared camera, a finger vein image with brightness meeting the requirements is obtained. Use the determined light source and camera parameters to collect multiple images to be processed, and convert them into binary images of vein patterns; combine multiple binary images of vein patterns to find the existence points of veins, and form a synthetic vein image; finally, from the synthetic veins Image features of finger veins are extracted from the image.

[0040] It can be seen that the present invention adopts the method of extracting composite features of multiple images collected continuously, which can improve the stab...

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Abstract

The invention discloses a finger vein feature extraction method. According to the method, the stability of vein feature extraction can be improved, more features can be obtained, and therefore the vein recognition accuracy can be improved conveniently. The method includes the steps that under irradiation of an infrared light source, an infrared camera is used for acquiring finger vein images; the finger vein images with brightness meeting requirements are obtained by adjusting parameters of the infrared light source and parameters of the infrared camera; a plurality of images to be processed are acquired by the adoption of the determined parameters of the light source and the determined parameters of the camera and converted into binary images of vein lines; vein existing points are sought for by combining the binary images of the vein lines, and a synthetic vein image is formed; finally, image features of finger veins are extracted from the synthetic vein image.

Description

technical field [0001] The invention relates to a finger vein feature extraction method, which belongs to the technical field of biometric feature recognition. Background technique [0002] Finger vein recognition technology is a new type of biometric identification technology. Because the user's finger vein characteristics are difficult to be forged, it has a high level of security and is especially suitable for use in places with high security requirements. [0003] The process of finger vein recognition is that the infrared light generated by the infrared light source is irradiated on the finger of the collector, filtered by the filter and reflected by the mirror, and collected by the infrared camera. Vein features are extracted from the collected images, and then feature matching is performed, thus realizing finger vein recognition. [0004] One of the key steps in finger vein recognition is vein feature extraction. The accuracy of vein feature extraction is determined...

Claims

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Application Information

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IPC IPC(8): G06K9/60
Inventor 郭庆昌胡国兵汤露
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP
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