Finger vein image acquisition device

Abstract

The invention discloses a finger vein image acquisition device. The device comprises an infrared light source, a finger detection position and an infrared image acquisition unit, wherein the infrared image acquisition unit is used for acquiring the vein image of a detected object placed at the finger detection position under irradiation of the infrared light source; and the device also comprises a vital sign detection unit which is used for acquiring the vital sign information of the detected object so as to judge whether the detected object is a true finger. The device can avoid the phenomenon that a person from places an artificial finger or a forged vein image at the finger detection position and the finger vein image acquisition device cannot distinguish between the realness and the fakeness to allow the artificial finger or the forged vein image to pass through safety certification, so that the safety of the system is obviously improved. The device can perform light source compensation by adjusting the brightness of the infrared light wave and reduce the influence of the stray light, such as sunlight, light and the like, on the image acquisition effect by using a shielding housing, so that the accuracy of the image acquisition is improved.

Description

technical field [0001] The invention relates to the field of human body biometric authentication, in particular to a finger vein image acquisition device. Background technique [0002] Using finger veins as human biological information for identity authentication has the characteristics of safety and high efficiency, so it has been widely used in banks, offices or some information security fields. At present, the finger vein image acquisition devices on the market usually only collect the vein image of a single finger, and cannot identify the vital signs of the measured object, so it is impossible to judge whether the measured object is a real finger, and forged finger or vein images may also deceive Therefore, the existing finger vein image acquisition device still has certain potential safety hazards. [0003] A prior art such as a Chinese patent with a publication date of January 17, 2007, a publication number of CN1897042A, and an invention title of "Biological Informat...

AI Technical Summary

Problems solved by technology

At present, the finger vein image acquisition devices on the market usually only collect the vein image of a single finger, and cannot identify the vital signs of the measured object, so it is impossible to judge whether the measured object is a real finger, and forged finger or vein images may also deceive Therefore, the existing finger vein image acquisition device still has certain potential safety hazards

[0003] A prior art such as a Chinese patent with a publication date of January 17, 2007, a publication number of CN1897042A, and an invention title of "Biological Information Registration Device" discloses a method of taking finger vein images by a camera in the hand area, and then judging Whether the finger that reads the vein information is consistent with the pre-selected finger or not; however, the technical solution provided by the invention cannot determine whether the finger that reads the vein information is a real human hand, and using this device for security authentication is easy to be deceived, so low security

Another prior art, such as a Chinese patent with a publication date of June 24, 2009, a publication number of CN101464947A, and an invention title of "Dual-mode Biological Image Acquisition Device Based on Fingerprint and Finger Vein", provides a technical solution It not only includes infrared receivers and vein image collectors, but also sets electrodes, temperature sensors and other devices to realize the function of living body recognition; however, the accuracy of living body recognition using only temperature is obviously low, and it is still unavoidable that forged fingers or vein images pass through. The status of security certification

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