Biometric identification technology is closely combined with high-tech means such as optics, acoustics, biosensors and biostatistics. It uses the inherent physiological characteristics of human body (such as fingerprint, face image, iris, etc.) and behavioral characteristics (such as handwriting, voice, gait, etc.) to identify personal identity. According to the physiological characteristics or behavior patterns of human biological characteristics, it can be divided into a variety of biometric identification. Physiological characteristics include hand shape, fingerprint, face shape, iris, retina, auricle, etc.; behavioral characteristics include signature, voice, etc. According to the different physiological characteristics of human body, biometric identification includes fingerprint recognition, iris recognition, face recognition, palmprint recognition, vein recognition, voice recognition, signature recognition, handwriting recognition, hand shape recognition and a variety of biological characteristics comprehensive recognition, etc. there are mature products and certain market applications.
Biology will become an important change in IT industry in the next few years. Biometrics is to use the inherent physiological or behavioral characteristics of the human body to identify personal identity through computer. Biometric authentication technology is not easy to forget and lose, not easy to forge and steal, can be “carried” and used anytime and anywhere. It has been paid attention to all over the world, and has been applied to identity, access management, security monitoring, e-commerce, e-government and other fields.
As fingerprint identification started earlier in the field of biometric identification technology, and with the fingerprint identification system out of key departments such as finance, government and airport, more and more appear in the enterprise level civil fields such as intelligent buildings, PC computers, etc., making fingerprint identification become a kind of biometric identification technology with the most application and the largest market share. Statistical data show that the annual sales volume of biometric identification market in China was about 165000 sets in 2005, of which more than 96% were fingerprint identification products. But in practical application, there are some problems in fingerprint identification. When you want to enter the office, the finger presses on the fingerprint access control system many times, but you can’t open the door; the fingerprint of people with shallow fingerprint and manual workers is difficult to identify; the recognition rate is not high. Due to the high requirements of the environment, fingerprint identification technology is sensitive to the humidity and cleanliness of fingers, which will affect the identification results.
The main evaluation criteria of fingerprint identification technology are the registration rejection rate (FTE), rejection rate (FRR), false recognition rate (far) and equal error rate (EER). Although many manufacturers of fingerprint verification technology usually claim that their products can meet the requirements of FRR 0.01% and far 0.001%. However, from the published academic papers and authoritative tests, such indicators are difficult to achieve.
The shortcomings of fingerprint identification are also reflected in several aspects
1. It has high requirements on the environment, and is sensitive to the humidity and cleanliness of fingers. Dirt, oil and water will cause identification failure or affect the identification result;
2. Some people or some groups have few or no fingerprints, so it is difficult to image;
3. It is difficult to identify and identify low-quality fingerprints such as peeling and scars, and it is difficult to register and identify some special groups such as manual workers with more calluses on their hands;
4. Every time a fingerprint is used, the user’s fingerprints will be left on the fingerprint collection head, and these fingerprints may be used to copy fingerprints;
5. The operation standard of fingerprint identification is high;
Compared with these, finger vein recognition can effectively avoid 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 identify. The working principle is based on the fact that the blood flowing in human fingers can absorb the light of a specific wavelength, and the clear image of finger vein can be obtained by irradiating the finger with light of specific wavelength. Using this inherent scientific feature, we can analyze and process the acquired image to obtain the biological characteristics of finger vein, and then compare the obtained finger vein feature information with the previously registered finger vein feature, so as to confirm the identity of the user.
Medical research has proved that the shape of finger vein has uniqueness and stability, that is, each person’s finger vein image is different, and the vein image of different fingers of the same person is not the same; the vein shape of healthy adults is no longer changed. This provides medical basis for finger vein.
Compared with fingerprint identification technology, it has the advantages of finger vein hidden in the body, the chance of being copied or embezzled is very small, the user’s psychological resistance is low, and the influence of physiological and environmental factors is small. It overcomes the factors of skin dryness, oil stain, dust, skin surface abnormality, etc. the whole process of original finger vein image from being captured to digital processing is less than 1 second, and can be triggered The high accuracy recognition rate (false recognition rate is 0.0001%, false rejection rate is 0.01%, registration failure rate is 0%) and other important features, which make it far better than fingerprint identification technology in high security and convenient use.
At present, finger vein recognition still has undeniable competitive advantage. As the only partner of Hitachi Group’s finger vein identification technology in China, Lingjia introduced its global unique finger vein technology and established the only Hitachi finger vein technology R & D center in China. On this basis, it developed a series of products suitable for the Chinese market, obtained a number of patents and fully owned independent intellectual property rights. The finger vein products developed by Lingjia group include: Lingjia finger vein identification terminal, Lingjia finger vein integrated machine, Lingjia finger vein safety module, Lingjia finger vein rapid development kit, etc; And the above products are applied to prison, family planning, coal mine, information security, finance, education, social security and other industries or departments. In the practical application, finger vein technology has been fully applied and achieved good results, which has been well received by customers. I believe that in the future, this advantage will be maintained until newer and more perfect technologies and products appear.
Editor in charge: CT