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Acquisition system and acquisition method for hand vein

An acquisition system and technology of the back of the hand, which is applied in the field of data acquisition of new biometric identification technology, can solve the problems of not being able to obtain high contrast, and the contrast of vein imaging on the back of the hand is not high, and achieve the effects of low price, industrialization, and improvement of image contrast

Inactive Publication Date: 2011-05-18
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0006] Second: For the reflection imaging mode widely used at present, the contrast of vein imaging on the back of the hand is not high, especially for capillary veins, high-contrast images cannot be obtained

Method used

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  • Acquisition system and acquisition method for hand vein
  • Acquisition system and acquisition method for hand vein
  • Acquisition system and acquisition method for hand vein

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Embodiment Construction

[0034] The specific implementation manner of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] figure 1 Shown is a schematic diagram of the composition of the system of the present invention. The system of the present invention is composed of reflective light source 1 , common CCD camera 2 , near-infrared filter 3 , scattering paper 4 , handle 6 and transmitted light source 7 . Two sets of light sources are used in combination, and there are three imaging modes: transmission mode, reflection mode or mixed mode. Two sets of near-infrared light sources irradiate the area of ​​the back of the hand 5 at the same time, wherein the transmitted light source 7 is placed on the side of the palm, and the light emitted by the transmitted light source 7 enters the ordinary CCD camera 2 through the back of the hand 5 to improve the contrast of the image; the reflected light source 1 is placed on the ordinary On both si...

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Abstract

The invention relates to an acquisition system and an acquisition method for a novel biometrics identification method. The system utilizes low-cost devices to acquire texture images of hand veins, reasonably designs a light path, and adopts a method combining transmission and reflection near-infrared light sources to realize three imagining modes: a transmission mode, a reflection mode and a mixedmode, thereby obtaining comprehensively considered hand vein images. Three times of filtering denoising treatment is used for smoothening the hand vein images, and finally output hand vein images canachieve the segmentation effect. The acquisition system can use a cheap non-professional camera due to reasonable light source design and an effective denoising treatment method, thereby greatly reducing the system cost.

Description

technical field [0001] The invention belongs to the technical field of data collection of novel biological feature recognition technology, and in particular relates to a dorsal hand vein collection system and a method thereof. Background technique [0002] Biometric identification based on dorsal hand vein is a new method of biometric identification. Hand vein recognition has outstanding performance in terms of uniqueness, permanence, effectiveness, and robustness, and can be used in banks and sports venues. In 2008, the Softball Hall of the Beijing Olympic Games used vein recognition on the back of the hand to manage the registration of athletes and test participants. Compared with traditional biometric identification, such as face and fingerprint, this method has special advantages based on the vein texture structure of the back of the hand: its imaging is active imaging, and it will not be greatly affected by the light distribution like the face under natural light. , a...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06K9/20G03B15/03G03B11/04
Inventor 王一丁赵实
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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