Fingerprint identification technology still lacks

Since fingerprint recognition started earlier in the field of biometrics technology, and with the development of fingerprint recognition systems beyond the financial, government, airport and other key departments, it has become more and more difficult because of the earlier start of fingerprint recognition in the field of biometrics technology. The fingerprint identification system has emerged from the critical sectors of finance, government, and airports, and is increasingly appearing in the enterprise-class civil fields such as intelligent buildings and PC computers, making fingerprint recognition the most widely used and most market-share biometric identification. technology. Statistics show that the annual sales volume of the Chinese biometric identification market in 2005 was about 165,000 units, of which more than 96% were fingerprint identification products. However, in practical applications, there are some problems with fingerprint recognition. When entering the office, the finger is pressed many times on the fingerprint access control system, but the door lock cannot be unlocked at all; fingerprints of people with weak fingerprint lines and manual workers' fingerprints are difficult to identify; the recognition rate is not high. Because the fingerprint recognition technology is very demanding on the environment, it is sensitive to the humidity, cleanliness, etc. of the fingers, which will affect the recognition result.

The evaluation criteria of fingerprint identification technology are mainly FTT, FRR, FAR, and EER. Although many vendors of fingerprint verification technology often claim that their products can achieve FRR<0.01% and FAR<0.001%, it is difficult to achieve such indicators from published academic papers and authoritative tests. .

The inadequacy of fingerprint recognition is also reflected in several aspects: 1. High requirements on the environment, sensitive to finger humidity, cleanliness, etc. Dirty, oil, and water can cause unrecognized or influential recognition results; Some people or some groups have few fingerprint features or even no fingerprints, so they are difficult to image. 3. There are difficulties in recognizing low-quality fingerprints such as peeling and scars, and the recognition rate is low. For some hands, there are more physical strengths. The registration and identification of some special people such as laborers are difficult; 4. Each time a fingerprint is used, fingerprints of users are left on the fingerprint collection head, and these fingerprints are used to copy fingerprints. Fingerprinting requires high operating standards; vein recognition stands out, and advantages are compared with finger vein recognition, which effectively avoids these problems. We can see the advantages of finger vein recognition through the following introduction.

The finger vein recognition technology is a new biometric identification technology that uses the vein distribution image inside the finger for identification. The working principle is that the blood flowing in the human finger can absorb the light of a specific wavelength, and the finger can be irradiated with a specific wavelength of light to obtain a clear image of the finger vein. Using this intrinsic scientific feature, the acquired image will be analyzed and processed to obtain the biological characteristics of the finger vein, and the obtained finger vein feature information will be compared with the pre-registered finger vein feature to confirm the registrant. identity of.

Medical research proves that the shape of finger veins is unique and stable. That is, each person's veins in the veins are not the same, and the vein images of different fingers of the same person are not the same; the shapes of veins in healthy adults no longer change.

This provides a medical basis for the finger veins.

Compared with the fingerprint recognition technology, it has the finger vein hidden inside the body, and the chance of being copied or stolen is very small. The user's psychological resistance is low, affected by physical and environmental factors, and overcome the dry skin, oil, dust, Abnormal skin surface and other factors, the original finger vein image from capture to digital processing, the entire process is less than 1 second, and can trigger a high accuracy rate (false positive rate of 0.0001%, rejection rate of 0.01%, registration failure The rate of 0%) and many other important features make it far better than fingerprint recognition technology in terms of high security and ease of use.

At present, it seems that everyone stops at the price of imported finger vein identification products. In fact, our vein identification products can already be one tenth of the price of foreign products of the same type! It can even hold the price of some fingerprint products!