"Intelligent wind" blows into the lock industry: facial recognition will become a trend

Can facial recognition be used on future smart locks? And will it replace the existing more mature "fingerprint + password" identification scheme?

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1. Early facial recognition is very tasteless

In September of this year, Apple released three mobile phones, the most concerned of which is the iPhoneX. In addition to the great changes in the appearance of iPhoneX, replacing the "face ID" of fingerprint recognition with adult face recognition has become the focus of public attention, and also makes "face recognition" changed from the previous laughing stock to talk. So can facial recognition be used in future smart locks? And will it replace the existing more mature "fingerprint + password" identification scheme?

Early fingerprint recognition and facial recognition are very tasteless

Before the popularity of push-type fingerprint recognition, at that time, although the electronic door lock did not have intelligent attributes, it was just an electronic lock with fingerprint recognition function. At that time, many electronic locks were similar in function to the attendance machine, and many attendance machine systems began to use fingerprints. Identification and attendance, the technology is relatively mature. However, because the push-type fingerprint recognition module was too large for technical reasons, it could not be placed in the mobile phone. So at that time, most of the mobile phones were scratch-type fingerprint recognition, and there were not many mobile phones that were unlocked in this way, and it was very inconvenient to use.

Many mobile phone manufacturers also realized that scratch-type fingerprint recognition is not convenient, so they tried to use the front camera that almost every smart machine would have at that time, and adopted a more mature solution on the attendance machine to launch a lot of face recognition unlocked mobile phones. Although the way to unlock the face is very novel, the disadvantages are obvious. For example, because the number of pixels in the camera is insufficient, the accuracy of recognition is low; or because there is no identification method such as infrared rays, the photo of the owner can be unlocked; It is almost unusable; and because of the insufficient processing power of the chip at the time, the recognition speed is very slow. So this novel function slowly became a chicken rib.

However, facial recognition is still very popular in the access control system of the attendance machine, because the attendance machine does not need to have a particularly high security relative to the mobile phone, and there is no limitation in the volume, but due to the versatility of the components. Purchasing costs are not particularly high compared to mobile phones. The feature of non-contact authentication for employees also makes facial recognition more hygienic than fingerprint recognition.

Because the response on the attendance machine is good, so many products that are unlocked by face recognition have begun to appear on the electronic lock. So many early smart lock products have facial recognition capabilities. But it didn't take long for it to be replaced with fingerprints almost overnight. What is the matter?

2. When the electronic lock evolves into a smart lock

Fingerprint recognition

After Apple released the iPhone5s, push-type fingerprint recognition technology has entered a period of rapid development. Fingerprint recognition technology has also gradually upgraded to optical fingerprint recognition with large volume and safety, and has gradually upgraded to fingerprint recognition technology using capacitive technology, biological living body recognition technology, ultrasonic sensing technology, etc., and the safety and speed are gradually improved. Since the fingerprint attendance machine does not have the same payment-related functions as the mobile phone, the security requirement is still weaker than that of the mobile phone, and it stays on the standard that "can be seen as an individual". However, the development of smart locks at this time has made users' technical requirements for security more and more high.

After the concept of the Internet of Things was put forward, the conventional electronic locks began to have intelligent attributes, and the unlocking path became more and more. This puts higher requirements on the security of smart locks, because the mobile phone has a more mature fingerprint identification scheme, so on the smart lock, the fingerprint recognition scheme on the mobile phone is also transplanted to the smart lock, gradually replacing the traditional one. Optical fingerprinting has become the mainstream. The advantage is that the recognition rate is high and the speed is fast, and the fingerprint recognition of the smart lock has the characteristics of biometric technology and wet hand unlocking.

Due to the promotion of fingerprint recognition in film and television works, the public has almost no doubt about the reliability of fingerprint recognition. However, fingerprint recognition has certain limitations in some aspects. For example, it is necessary to free one hand to unlock, and the fingerprint is relatively easy to obtain (the cost of fingerprint copying is temporarily ignored).

Moreover, some old people and children's fingerprints are not obvious, and the fingerprint recognition on the smart lock is almost completely ineffective for both types of people. For some people, the finger is still relatively easy to be injured and defaced. Once it is injured, it is more difficult to be identified. It is necessary to enter a few fingerprints for backup. However, humans only have ten fingerprints. Once a special situation such as failure of all fingerprints is encountered, the fingerprint unlocking is no longer convenient.

Facial recognition

Therefore, the non-contact verification method similar to face recognition has started various development and testing on mobile phone manufacturers, but this time it is not relying on facial recognition, but relying on iris recognition technology, through the front camera of the mobile phone. Non-contact iris scanning.

The structure of the human eye consists of the sclera, iris, pupillary lens, retina and the like. The iris is an annular portion between the black pupil and the white sclera that contains many detailed features of interlaced spots, filaments, crowns, stripes, crypts, and the like. Since the iris is less changed than the human face, the accuracy is much higher. In many sci-fi movies, iris recognition is also included in the film plot as a “high-level” authentication method.

Editor in charge: Zhao Hongli


3. Can face recognition replace fingerprint recognition?

However, if iris recognition is placed on a smart lock, the limitations are much higher. First of all, the authentication process is cumbersome. You need to activate the authentication program first, and then aim your eye at the recognition lens for authentication. Moreover, the identification module is relatively large in volume and relatively high in cost. It is even more impossible to put it on a home smart lock. In addition to this, there are many restrictions on iris recognition.

Part of the identification module will fail after wearing glasses, sunglasses or enamel, and the part that covers the eyes needs to be removed before accurate identification can be performed. Moreover, it is not friendly to blind people or people with small eyes, so there are few products that use retina recognition on smart locks.

On the latest iPhoneX released by Apple, fingerprint recognition was completely abandoned without warning, and face recognition was re-established as the main method of authentication.

Facial recognition comeback?

This gives the majority of smart lock manufacturers a new idea, which can be used as a way to authenticate face recognition. After all, face recognition has some advantages over fingerprint recognition. Since facial recognition belongs to non-contact recognition, when you can't open your hands, you want to open the door. You can unlock the face directly against the smart lock's identification lens, which is convenient and prevents cross infection of the hand germs.

4. New facial recognition is the future of smart locks

The extent to which most smart lock manufacturers can achieve facial recognition is simply to recognize the face that was originally entered. Once you have makeup, or wearing glasses, it is difficult to accurately identify. However, as time goes by, I believe there will be many powerful technology companies to provide solutions. This includes the accuracy of face recognition, speed and fault tolerance will be greatly improved.

Moreover, compared with the mobile phone, the recognition scene of the smart lock is relatively simple, and only the smart lock needs to be fixed on the door, so that the person who needs to be identified is standing at a fixed position, and it is not necessary to free the fingerprint and password to identify. This is one of the reasons why face unlocking is more suitable for smart locks.

Imagine that you will stand in front of your own home in the near future, and your hands will be occupied. At this time, you only need to look at your smart phone's identification module in front of your home to take care of your face and enter your home. Even the chance to reach out is not for you. If you are used to changing the keys to other traditional entrance doors, I believe that you will be convinced by the magic of technology at this time. This is "the real technology, that is, you can not feel the existence of technology."

Now this new type of facial recognition technology has appeared on the iPhoneX. I believe that soon after, like the original fingerprint recognition, there will be a large number of manufacturers with technical strength to follow up and produce the corresponding products. Although the cost of implementing this facial recognition technology is relatively high, the cost will decrease as other manufacturers follow up.

The new face recognition technology on PhoneX, if it appears on the smart lock, can completely replace the current "password + fingerprint" recognition method, because of the recognition speed, accuracy, scene, etc. of this new face recognition with "fingerprint recognition + password "There are many advantages." Although only Apple has implemented this technology, there will be more smart lock manufacturers to follow up, and the cost of smart locks using this identification scheme will gradually decrease to be similar to today's fingerprint recognition modules. This makes this emerging technology accessible to thousands of households.

Editor in charge: Zhao Hongli

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