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Self-adaptive hand back vein image collecting system

A vein image and acquisition system technology, applied in the direction of instruments, character and pattern recognition, computer components, etc., can solve the problems of unstable parameters, variable quality of vein images, etc., and achieve convenient follow-up processing, strong practical effect, and quality evaluation The algorithm is simple and effective

Inactive Publication Date: 2015-07-08
TIANJIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] The purpose of the present invention is to solve the situation that the quality of the vein image is different and the parameters are unstable during the acquisition process, reduce the difference caused by the thickness of the back of the individual hand and the thickness of the blood vessel, and provide an adaptive vein back of the hand acquisition system

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  • Self-adaptive hand back vein image collecting system

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] as attached figure 1 As shown, the present invention includes an image acquisition module, an image quality evaluation module and an information feedback control module. The image acquisition module has a shell part, and a window for placing the back of the hand is located in the middle of the shell. An infrared camera 1 is installed in the upper part of the housing and equipped with an infrared filter 2, and then the annular infrared light source 3 and the light guide plate 4 perform vein reflection. There is an indicator light (not shown in the figure) outside the casing, which is used to prompt that the high-quality vein image is successfully saved.

[0024] Described infrared camera is the CMOS camera of ELECTROOPTIC company. The infrared light source is an annular array of LEDs, which irradiates on the back of the hand to facilitate the infrared...

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Abstract

The invention discloses a self-adaptive hand back vein image collecting system and relates to the technical field of biometric identification. The system mainly comprises an image collecting module, an image quality evaluation module and an information feedback control module. The image collecting module is mainly composed of an infrared light source, a light guide board and an infrared camera. At first, the infrared light source uniformly irradiates a hand back area, and then the infrared camera is used for photographing reflecting light so as to capture a hand back vein structure image; the obtained vein image is transmitted to the image quality evaluation module which analyzes the image contrast ratio, the effective area and information entropy to judge image quality information, the analysis result is fed back to the control module, then a related instruction is transmitted to complete self-adaptive adjustment on the position of the camera and the brightness of the infrared light source, a high-quality vein image is obtained so as to meet the requirement for follow-up treatment, and the quality evaluation algorithm is simple, effective, and good in practical effect.

Description

technical field [0001] The invention relates to the technical field of biological feature recognition, in particular to a dorsal hand vein collection system. Background technique [0002] With the increasingly stringent requirements for the security of personal items, internal networks, building passages, networks, etc., the demand for identity authentication technology is becoming more and more urgent. Biometric technology is a safe and convenient identification method. As an important identification feature, the vein on the back of the hand has the characteristics of uniqueness, stability, collectability, and non-invasiveness. Compared with biometric methods such as face and voice, human veins have higher accuracy and safety. sex. In recent years, this technology has been more and more widely used in the field of identification. Whether it is used as the main identification method or an auxiliary identification method combined with other identification methods, it has br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 杨晓苹屈冰广于典
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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