Popularization of new knowledge of finger vein recognition

Inner Mongolia's 2015 college entrance examination has made more adjustments in the registration, examination, and admission policies. Among them, all candidates must collect finger vein information when they register, and they can only enter the venue after passing the verification. The following is the knowledge popularization of finger vein recognition technology.

What is a vein?

Finger vein recognition technology is a kind of biometric recognition technology, which uses the vein distribution image in the finger to perform identity recognition. The technology is based on the fact that blood flowing in a human finger can absorb light of a specific wavelength, and the light of a specific wavelength is used to illuminate the finger to obtain a clear image of the finger vein. Using this inherent scientific feature, the acquired image will be analyzed and processed to obtain the biological characteristics of the finger vein, and then the obtained finger vein feature information will be compared with the previously registered finger vein feature to confirm the registrant identity of.

Finger vein principle

Finger vein is a new biometric recognition technology, which uses the vein distribution image in the finger to identify. Medical research has proved that the shape of finger veins is unique and stable, that is, the image of finger veins of each person is different, and the image of veins of different fingers of the same person is different; the shape of veins in healthy adults no longer changes. This provides a medical basis for finger veins.

basic introduction

Finger vein recognition is a technique for obtaining a finger finger vein distribution map through a finger vein recognition instrument, storing characteristic values, and then matching for personal identification. The basic principle is to use the characteristic that red blood cells in veins absorb specific near infrared rays, illuminate the near infrared rays on the fingers, and the image sensor senses the light transmitted by the fingers to obtain vein images inside the fingers, and then perform biometric recognition. The key is that the hemoglobin in the red blood cells flowing through the veins will absorb the near infrared rays with a wavelength around 700-1000 nanometers, resulting in less transmission of the near infrared rays in the vein. When the near infrared rays are transmitted, the veins are sensed by the image sensor Will be highlighted on the image, while the finger muscles, bones and other parts are weakened, resulting in a clear image of the veins. Finger vein recognition technology uses the texture of finger vein blood vessels for identity verification, which is harmless to the human body and has the characteristics of not being easily stolen or forged. The identification technology can be widely used in access control systems in the fields of bank finance, government security, education and social security, etc. It is a safer and more efficient technology than fingerprint recognition, iris recognition and other surface feature recognition technologies.

High security

The principle of the finger vein system is to match the pattern of veins inside the finger. Because the veins are hidden inside the fingers, it is extremely difficult to copy and steal. Compared with other technologies that use the external characteristics of the human body, this method is more secure. At the same time, the veins can sense the blood flow and blood pressure in the finger, and can perform biopsy during the recognition process.

High accuracy

Because the sampled samples are inside the human body, the interference from the outside during the matching process is very small. The accuracy of finger veins is very high. According to strict medical certification and mathematical statistics, FRR (rejection rate) is less than 0.01%, FAR (confidence rate) is less than 0.0001%, and FTE (login failure) is 0%.

Uniqueness

According to medical evidence, the distribution of finger veins between different people is completely different, and the distribution of veins in the left and right hands is also different. Even if it is the same finger of a twin, the distribution of veins in them is also different. And the distribution of the veins of the finger veins will not change after adulthood. For minors, when their finger veins change with age, it takes only 30 seconds to complete the re-registration.

Non-contact

Compared with some biometric technologies, the finger vein recognition technology is non-contact and will be more hygienic in public.

Small sample file

Because the veins of the finger are relatively stable and easy to shoot, a low-resolution camera can meet the sampling requirements. The vein template file generated in this way is small and the matching speed is fast.

Difference from fingerprint recognition

Compared with fingerprint recognition technology, the finger veins are hidden inside the body, the chance of being copied or stolen is very small, the user's psychological resistance is low, and the influence of physiological and environmental factors is small, which overcomes dry skin, oil stains, dust, and skin surface Due to factors such as abnormality, the original finger vein image is captured and digitized in less than 1 second, making it far superior to fingerprint recognition technology in terms of high security and ease of use.