Fingerprint recognition vs face recognition vs iris recognition vs finger veins? Do you really understand biometric technology?
Author: huifan Time: 2021-04-19
Finger vein recognition is a new type of biometric recognition technology that has developed in recent years. Compared with the commonly used biometric recognition such as fingerprints, faces, and iris on the market, what are the differences? Let's follow along with the editor to find out.
1. Technical Principle
Finger vein recognition uses the pattern features of finger veins to realize identity authentication. When the finger is irradiated with near-infrared rays, the hemoglobin flowing in the vein will absorb the near-infrared rays to form an image of the blood vessel. The image of the finger vein can be obtained through the sensor and processed by an algorithm to form a specific finger vein template. After medical verification, each person’s finger vein image is different, and the template formed is a unique biological feature that can be used for identity recognition.
From the technical system, finger vein recognition technology mainly includes four stages: image acquisition, preprocessing, feature extraction, and feature matching.
Direct light collection: Near-infrared light source and image sensor are located on both sides of the finger. At present, the mainstream technology manufacturers on the market all adopt the direct light collection method.
Affected by factors such as the quality of the acquisition equipment and the lighting conditions, the acquired finger vein images often contain certain noises and the quality is not ideal. This requires the use of corresponding pre-processing techniques to solve this problem.
3. Feature extraction
The currently used finger vein features mainly include vein pattern features, texture features, minutiae features, and features extracted by machine learning methods.
4. Feature matching
Compare and match the similarities and differences between the retrieval questions that express information needs and the information identifiers stored in the retrieval system, and select the information that matches or partially matches the two to output.
1. Technical comparative analysis
1. Security: Since the veins of the biometric carrier are located inside the finger, unless a living finger is copied, the image of the blood vessel formed by the flowing blood is difficult to obtain and replicate by ordinary technical means.
2. Uniqueness: Everyone's veins are different, even twins with very similar looks have different vein images, and this difference will not disappear in their (her) lives.
3. Stability: During the growth process, the veins will not undergo fundamental changes. After adulthood, the veins are basically stable. And finger vein features are not affected by skin surface wrinkles, texture, roughness, dry humidity, peeling fingers, scars, calluses or dirty, water, oil and other external features, nor will it affect the speed and accuracy of recognition.
4. Ease of use: Finger vein features are easy to extract, and the image of finger veins is clear and relatively stable.
5. Cost: Finger vein recognition requires dedicated infrared thread imaging equipment, so the cost is relatively high. Ordinary finger vein recognition equipment requires hundreds of yuan, and high-end equipment requires more than 1,000 yuan.
A well-known biometric recognition technology supplier has conducted various performance comparisons and evaluations on fingerprint, face, iris, finger vein and other recognition technologies. The results are as follows:
Therefore, in today's many biometric technologies, finger vein recognition technology has a very high level of security, and it has unique advantages in terms of uniqueness, stability, and ease of use.
Three, technical application analysis
At the market and application level, finger vein recognition products appeared in Japan, Turkey, Poland and other places as early as 1995, and Hitachi introduced the technology to the Chinese market around 2008.
At present, finger vein technology has begun large-scale commercial use in overseas markets such as Japan, Taiwan, the Middle East, and Latin America. In particular, finger vein biometric technology has been widely introduced in social security and bank ATMs, gradually replacing the original fingerprint and iris. And other products.
In addition, finger vein recognition technology has also begun to be applied on a large scale in high-end places with high security requirements, such as office access control, GMAT test, Turkish banks, domestic bank vaults, and prisons in the New York branch of the US Trust Finance Central Bank.
Four, application scenarios and products
1. Finger vein smart door lock
It is a smart door lock that integrates multiple unlocking methods such as finger veins, passwords, magnetic cards, and keys. Free sliding lid, light luxury straight board, minimalist fashion, multiple shapes and colors to choose from. It is not affected by the skin of the fingers and the external environment, and can be used by the elderly and children, creating bank-level security for the home.
2. Finger vein recognition module
It uses the biological characteristics of human finger veins to extract, identify and authenticate identity information. It is applied to scenarios such as self-service query terminals and portable social security intelligent terminal equipment in the social security business hall.
3. Finger vein access control and attendance system
Xier Shield Time Attendance Machine integrates multiple functions such as collection and authentication; it integrates multiple authentication methods such as finger vein, second-generation ID card, IC card, etc.; it can be connected to an access controller; it can be used for multi-purposes such as attendance and sign-in.
It is widely used in high security fields such as banks, computer rooms, confidential rooms, prisons, troops, governments, schools, offices, and intelligent communities.
4. Finger vein security cabinet
Using non-contact finger vein recognition as the access certificate, the computer dynamically monitors the status of the confidential file cabinet in real time, and manages and processes the data of the entire system. It is suitable for the authority management, real-time monitoring, data analysis and statistics of confidential documents and important items in confidential rooms, financial rooms, government affairs centers and other places.
Compared with fingerprints, iris, human face and other biological features, finger vein features have the advantages of being difficult to replicate, non-skin features, non-contact recognition, safety, efficiency, and convenience. After years of hard work, the current research on finger vein recognition has made great progress, and has achieved a certain degree of application in the fields of attendance, access control, and automobile safety. Now, finger vein recognition technology is gradually penetrating into home applications, and we have reason to believe that a series of high-end scientific and technological achievements of finger vein smart locks will surely provide us with a more solid security guarantee.
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