Development of intelligent fingerprint lock and finger vein technology

As far as smart products are concerned, fingerprint recognition is one of the most widely used in biometrics, and it should be thanks to the huge mobile phone industry, which makes fingerprint identification technology at your fingertips. After the mobile phone market gradually saturation, fingerprint identification and found a most promising new market, namely smart door lock.

Fingerprint identification is now standard in smart door locks, especially in household smart door locks. In this, because of the price reason, the optical recognition scheme application is more common, can account for more than 70%. For the optical fingerprint identification scheme, it can be said that the security problem of false finger deception is the mishap of this scheme.

In addition, the optical identification scheme is not good for the recognition of dry fingers, in the cold weather in the north, it is very important to affect the user experience, and the semiconductor identification scheme for oil stains or wet finger recognition effect will be discounted. In addition, no matter optical or semiconductor fingerprint identification, can not be done in strict sense in vivo detection.

The industry is generally looking for safer biometric solutions, such as face, Iris, etc., but it is difficult to apply large-scale smart door locks due to the maturity and price of technical solutions. There is a kind of technical solution that is similar to fingerprint recognition, which is expected to be an upgrade replacement for fingerprint recognition, which means vein recognition.

01
The principle and advantage of finger vein recognition

The principle of the finger vein scheme is to use the wavelength 700-1100nm infrared light to illuminate the finger, and the hemoglobin in the internal vein of the finger absorbs part of the infrared light, thus drawing the image of the finger vein. Then the image is digitized and the feature is extracted, and the identification process is accomplished by the comparison of the image of the finger vein which has been recorded.

The key to finger vein recognition is to use the absorption of hemoglobin in the flow of blood to the infrared light, which is a real living test, and has the following advantages:

  1, not affected by environmental climate factors, such as temperature, humidity, such as
  2, not affected by the surface of the finger, such as water droplets, grease, dirt, etc., even if the finger off the skin or a slight wound can be identified, this point for the finger surface folds, fingerprints of the elderly especially useful.
  3, real live detection, difficult to fake
  4, can be non-contact detection, not to the surface of the reading head wear
  5, the characteristics of the vein is stable, the elderly children can use
  6, refers to the vein is to detect hidden biological characteristics, difficult to replicate

Scheme fingerprint identification refers to vein recognition
Optical type Semiconductor type
Whether the live detection is not
No Yes
Finger surface effects have, dry fingers, dirty, wet fingers, no effect of dirt
The advantages of mature technology, low price module volume minimum Experience the best, difficult to forge
Low safety and medium height

02
Complete finger vein Scheme

The principle is not complex, a few words can be explained clearly, but in fact, the principle into a mass production of stable solutions There are many problems to be solved. According to Richard Carey, there are independent research and development on the market and can provide commercial finger vein identification program in single digit, Holy Dot technology is one of them, and the uu of the creation of intelligent product Development program is also a place to occupy.

The finger vein technology was first developed by Hitachi in Japan, and commercial solutions began to emerge in China from 2015 onwards. Also after nearly three years of research and development, the introduction of algorithms, chips, reading head equipment, back-end systems and other complete and reliable finger vein recognition program.

Richard Carey says the algorithm is the heart of the vein scheme. In the development of core algorithm, it took two years to carry out two large technical upgrades, which solved some pain points in practical application.

The key of finger vein recognition is the absorption of hemoglobin to infrared light, for some special people, such as hypoglycemia, the blood hemoglobin content is low, the infrared light absorption of the incident is less, it will affect the analysis of the vein pattern.

Or some people, such as the elderly, refers to the vein of capillary blood vessel details are not enough, the analysis of the finger vein pattern identification is not high enough, these problems need to be improved at the algorithm level.

With reliable technical strength, point-of-origin technology has been used in military, banking, education and other fields. Especially in the banking field, due to the occurrence of false fingerprint theft, banks and other financial institutions have the highest degree of acceptance of finger vein technology.

In the finger vein recognition module miniaturization, also made a breakthrough, has developed can be used for smart door lock module scheme, its volume size and general optical fingerprint identification module, and has been based on the vein module of Intelligent lock product mass production listed. With a higher level of safety, the point-of-origin technology is the "Top Ten Technology Innovation Award" in the "2017 China smart door lock eco-circle Top ten brand Awards" recently organized by Smart Product circle and Si Rui da Consulting.

Richard Carey said that, after all, the vein recognition technology mature commercial also just started, the price will be slightly higher than the current fingerprint identification scheme. Once the shipment has increased, the price of the vein module can quickly be reduced to the same level as the Fingerprint identification module. In fact, the relevant programs are also being tested.

In addition to military, financial and other industry applications, smart door locks can be said to refer to the best application of the vein identification, especially with the optical fingerprint identification in the principle and structure of similarity, so that the finger vein recognition scheme can be very smooth replacement of optical fingerprint identification scheme, the finger vein technology for the most important security of smart door lock will be significantly improved.

The competition of smart door locks is becoming more and more intense, and after consumers gradually pay more attention to the security of the door lock, it is expected that the technology of vein recognition is more common application.