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Vein identification device

A technology of vein identification and enhancement device, applied in the field of vein identification, can solve the problems of unevenness, low definition of finger vein images, affecting the performance of subsequent feature identification, etc., and achieve the effect of good imaging contrast and good image quality.

Pending Publication Date: 2017-07-18
宁波芯然科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In this specific recognition process, due to the obvious difference in finger thickness and vein thickness, and the change of imaging distance caused by finger swing, and the vein veins are greatly disturbed by muscle, bone and other noises during imaging, the affected errors will lead to finger Vein image definition is low and uneven
However, vein images with poor quality are not easy to extract features, which seriously affects the performance of subsequent feature recognition.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1, such as figure 1 As shown, a vein identification device includes a housing 1, a finger groove 2 is arranged on the upper part of the housing 1, an illumination light source module is arranged above the finger groove 2, an imaging module and an imaging module are arranged below the finger groove. Finger positioning device. The illumination light source module includes an LED array 31 on which several uniformly arranged LED lamps are arranged, and the LED array 31 illuminates toward the finger slot 2 . The finger positioning device includes a reflective light source group, and the reflective light source group includes a positioning light source 51 facing the fingertip part and the fingertip part of the finger groove 2, and the positioning light source 51 faces the finger groove 2 irradiate near-infrared light. The imaging module includes a CMOS camera 41 and an infrared filter 42 , and the infrared filter 42 is between the CMOS camera 41 and the finger slot ...

Embodiment 2

[0034] Example 2, such as figure 2 As shown, a vein identification device includes a housing 1, a finger groove 2 is arranged on the upper part of the housing 1, an illumination light source module is arranged above the finger groove 2, an imaging module and an imaging module are arranged below the finger groove. Finger positioning device. The illumination light source module includes an LED array 31 on which several evenly arranged LED lamps are arranged, and the LED array 31 illuminates toward the finger groove 2 . The finger positioning device includes a reflection light source group, and the reflection light source group includes a positioning light source 51 arranged on the fingertip part and the fingertip part of the finger groove 2, and above the positioning light source 51 is arranged a light source for forming structured light. The lens 52 , the near-infrared light irradiated by the positioning light source 51 passes through the lens 52 to form structured light and ...

Embodiment 3

[0037] Example 3, such as image 3 As shown, a vein identification device includes a housing 1, a finger groove 2 is provided on the upper part of the housing 1, an irradiation light source module and an irradiation enhancement device are arranged above the finger groove 2, and an irradiation enhancement device is arranged below the finger groove There are imaging modules and finger positioning devices. The illumination light source module includes an LED array 31, and the illumination enhancement device includes a condenser lens 32. Several evenly arranged LED lamps are arranged on the LED array 31, and the LED array 31 passes through the condenser lens 32 to the finger groove 2 directional light. The finger positioning device includes a reflection light source group, and the reflection light source group includes a positioning light source 51 arranged on the fingertip part and the fingertip part of the finger groove 2, and above the positioning light source 51 is arranged a...

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Abstract

A vein identification device relates to the vein identification technology, and comprises a housing; a finger slot, an irradiation light source module and an imaging module are arranged in the housing; the features are that an identification enhancement mode is also arranged in the housing; the identification enhancement module comprises one or more of the following units: a finger positioning unit, an irradiation reinforcing unit, and an imaging reinforcing unit; compared with the prior art, the identification enhancement module is added, and comprises one or more of the following units: the finger positioning unit, the irradiation reinforcing unit, and the imaging reinforcing unit; the finger positioning unit uses structure light to irradiate on the fingertip and finger end so as to obtain the finger pitch angle and deviation angle, thus obtaining excellent finger position information; the irradiation reinforcing unit focuses the light source on the finger through a condenser, thus obtaining excellent imaging quality; the imaging reinforcing unit uses a reflection structure to obtain sufficient edge information and a long light path, thus obtaining excellent imaging contrast.

Description

technical field [0001] The invention relates to a vein recognition technology, in particular to a finger vein recognition technology. Background technique [0002] Finger vein recognition is a new generation of biometric identification technology. Its main advantage is that veins are hidden inside the body and are not easy to steal and copy, and only living bodies have veins. Compared with traditional identification technologies such as fingerprints, its security performance is higher, and it has great application prospects in security access control, credit card verification, medical identification, criminal identification and file management. The finger vein image acquisition is based on the mechanism that part of the near-infrared rays are absorbed by hemoglobin when the near-infrared rays pass through the finger, so as to realize the display of the finger vein image. [0003] In this specific recognition process, due to the obvious difference in finger thickness and vei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/10G06V40/14
Inventor 徐晨陶志刚
Owner 宁波芯然科技有限公司
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