Fingerprint recognition and finger vein recognition in biometric authentication technology
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Biology will become an important change in the IT industry in the next few years. Biological characteristics are the use of the inherent physical or behavioral characteristics of the human body to identify individual identities through a computer. Biometric authentication technology has the advantages of not easy to forget and lose, not easy to forge and stolen, and can be “carried” and used anytime and anywhere. It has been paid attention to by the world and applied to identity, entrance and exit management, security monitoring, e-commerce, and e-government. And so on in various fields.
Biometric recognition technology is a close combination of computers and high-tech methods such as optics, acoustics, biosensors, and biostatistics. It uses the inherent physiological characteristics of the human body (such as fingerprints, facial features, iris, etc.) and behavioral characteristics (such as handwriting, handwriting, etc.). Voice, gait, etc.) for personal identification. According to the physiological characteristics or behavior of human biological characteristics, it can be divided into a variety of biological identification. Physiological characteristics include hand shape, fingerprint, face shape, iris, retina, auricle, etc.; behavior characteristics include signature, voice, etc. According to the different physiological characteristics of the human body,BiometricsIncluding fingerprint recognition, iris recognition, face recognition, palmprint recognition, vein recognition, voice recognition, signature recognition, handwriting recognition, hand shape recognition, and comprehensive recognition of multiple biological characteristics. There are mature products and certain Market application.
Because fingerprint recognition started early in the field of biometric recognition technology, and as fingerprint recognition systems stepped out of key sectors such as finance, government, and airports, more and more of them appeared in enterprise-level civilian fields such as intelligent buildings and PC computers. Fingerprint recognition has become the most widely used biometric recognition technology with the largest market share. Statistics show that the annual sales volume of China’s biometric identification market in 2005 was about 165,000 sets, of which over 96% were fingerprint identification products. But in real applications, fingerprint recognition also has some problems.When you want to enter the office, your finger is fingerprintingAccess controlThe system has been pressed many times, but the door lock cannot be unlocked; people with shallow fingerprints and manual workers are difficult to identify with fingerprints; the recognition rate is not high, etc. Because fingerprint recognition technology has high requirements for the environment, it is very sensitive to the humidity and cleanliness of the fingers, which will affect the recognition results.
The evaluation criteria of fingerprint recognition technology are mainly rejection rate (FTE), rejection rate (FRR), false recognition rate (FAR), and equal error rate (EER). Although many fingerprint verification technology providers usually claim that their products can achieve FRR<0.01% and FAR<0.001%. But judging from publicly published academic papers and authoritative tests, such indicators are difficult to achieve.
The shortcomings of fingerprint recognition are also reflected in several aspects:
1. The requirements for the environment are very high, and they are very sensitive to the humidity and cleanliness of the fingers. Dirty, oil, and water will cause the recognition to be impossible or affect the recognition results;
2. Some people or certain groups have few or no fingerprints, so it is difficult to image;
3. It is difficult to identify low-quality fingerprints such as peeling and scars, and the recognition rate is low. For some special groups such as manual workers with more calluses on their hands, it is more difficult to register and identify some special groups;
4. Every time a fingerprint is used, the user’s fingerprint print will be left on the fingerprint capture head, and these fingerprint traces may be used to copy the fingerprint;
5. The operation specification requirements for fingerprint recognition are relatively high;
Compared with these, finger vein recognition effectively avoids the above problems. Through the following introduction, we can see the advantages of finger vein recognition.
Finger vein recognition technology is a new biometric recognition technology, which uses the vein distribution image in the finger to perform identity recognition. The working principle is based on the fact that the blood flowing in the human finger can absorb light of a specific wavelength, and the finger is irradiated with light of a specific wavelength to obtain a clear image of finger veins. Using this inherent scientific feature, the acquired images will be analyzed and processed to obtain the biological characteristics of the finger veins, and then the obtained finger vein characteristic information will be compared with the pre-registered finger vein characteristics to confirm the registrant identity of.
Medical research has proved that the shape of finger veins is unique and stable, that is, each person’s finger vein images are different, and the vein images of different fingers of the same person are also different; the vein shape of healthy adults no longer changes. This provides a medical basis for the finger veins.
Compared with fingerprint recognition technology, it has finger veins hidden inside the body, there is little chance of being copied or misappropriated, the user’s psychological resistance is low, and it is less affected by physiological and environmental factors. It overcomes dry skin, oil stains, and dust. Skin surface abnormalities and other factors, the entire process from capturing to digital processing of original finger vein images takes less than 1 second, etc., and can trigger a high accurate recognition rate (false recognition rate of 0.0001%, false rejection rate of 0.01%, registration failure Rate 0%) and many other important features, making it far superior to fingerprint recognition technology in terms of high security and ease of use.
At this stage, finger vein recognition still has an undeniable competitive advantage. As the sole partner of Hitachi Group’s finger vein recognition technology in China, Lingjia introduced its global unique finger vein technology and established the only Hitachi finger vein technology R&D center in China, and developed a series of products suitable for the Chinese market on this basis. It has obtained a number of patents and fully possesses independent intellectual property rights. The finger vein products developed by Lingjia Group include: Lingjia Finger Vein Recognition Terminal, Lingjia Finger Vein All-in-one Machine, Lingjia Finger Vein Safety Module, Lingjia Finger Vein Quick Development Kit, etc.; and apply the above products to prisons and family planning In practical applications, finger vein technology has been fully applied in industries or departments such as coal mines, coal mines, information security, finance, education, and social security, and achieved good results, which has been praised by customers. It is believed that this advantage will be maintained for a period of time in the future until newer and more complete technologies and products appear.
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