Xiaomi 8 uses Liu Hai's full screen design. The bangs area at the top of the screen not only houses the handset, front camera, distance sensor, but also incorporates infrared lighting elements and an infrared camera for face unlocking. Compared to traditional mobile phones relying on the front camera Face unlocking, what difference is the infrared face unlocked by Xiaomi 8?
How to work with infrared face unlocked by Xiaomi 8?
The core of infrared face unlocking technology is infrared imaging. At present, there are two kinds of infrared imaging in the mainstream. Objects emit infrared light above absolute zero, and animals and humans emit strong infrared light, while stones, trees and other environmental objects emit infrared light. The light is very weak, and the night vision instrument commonly used in the military is to use this feature for infrared imaging. However, this passive infrared imaging often requires relatively large-scale equipment and instruments, and the hardware cost is high.
Active infrared imaging technology uses a special infrared light source to actively emit infrared light to the human body and receive infrared light reflected from the human body for imaging. The infrared face unlocking of Xiaomi 8 is based on this technical principle.
The reason why the Xiaomi 8's bangs looks wider is because the Liuhai region integrates infrared lighting components, infrared cameras, traditional front-facing cameras, earpieces, and distance sensors.
When you pick up the phone to light up the screen, the infrared illumination element of Xiaomi 8 Liu Haili will emit infrared light of 940nm to the human face. The infrared light will come into contact with the face to reflect back and enter the 3μm infrared camera (IR Camera) for imaging. Millet 8 will process the acquired infrared face image, remove environmental information such as noise in the image, extract 4096 face feature points, compare features with infrared facial data that has been entered in the mobile phone, and then successfully unlock and enter the desktop.
Conventionally relying on the front camera face unlocking technology, the front camera is equivalent to self-photographing the face when lighting up the screen, generating a 2D face image to match and match with the facial data stored in the mobile phone. The infrared face of the millet 8 Unlocking is the use of active infrared light source (infrared lighting components) for the face light, infrared camera to receive infrared light emitted from the face back to image. Generally speaking, millet 8 infrared face unlocking process, in fact, can be seen as a 'fill' The process of 'self-portrait' is just the 'fill light' here is invisible infrared light.
What is the advantage of infrared face unlocking?
Not affected by light, all black can quickly unlock.
The traditional face unlocking technology is mainly based on visible light imaging. There are many defects. When the ambient light changes, the recognition effect will drop sharply, and it cannot meet the actual application environment. For example, the phenomenon of “yin and yang face” appears when encountering sidelights. , it may not be correctly identified.
The effects of light changes on visible light imaging (top) and infrared imaging (downside), from the network
When the phone is unlocked at night and in other dark environments, the unlocking of the face of a traditional front-facing camera can result in a serious shortage of light, which makes it impossible to perform effective visible light imaging, resulting in a very low success rate of unlocking and even unusable.
The infrared face unlocking of Xiaomi 8 will not have such a problem. Whether it is day or night, infrared lighting components will always fill your face with 'fill light', just you can't see it. And look at the infrared camera in Xiaomi 8. 3. Your face is no different from daytime.
Safer, effective against prosthetic attacks
The traditional face unlocking scheme using front camera to take pictures using visible light is often easily unlocked by photos, videos, and even 3D printed masks. The security is low.
The infrared face unlocking of Xiaomi 8 uses the infrared light with a wavelength of about 940nm for imaging, photographs, and the screen for playing face video. The reflection characteristics of the 3D printing mask and the real human face for infrared light are very different. Eventually, they are in Xiaomi. The imaging results obtained by the 8 infrared camera are completely different. For example, when trying to unlock the millet 8 with a photo on the pad, the infrared light captured image is just a Pad... and there is no face information. Thus, the used Infrared Face Unlocking Technology Millet 8 is effective for live detection, with a high level of security.
Wear sunglasses can also unlock, both convenient and safe
Because the infrared light characteristics can penetrate the sunglasses lens, the eye information blocked by the sunglasses can also be normally imaged in the infrared camera. The imaging result and the face data entered by the system can meet more feature points when the features are compared, and the security is more secure. Gao. However, traditionally relying on the frontal camera for face unlocking scheme, due to the large amount of missing eye data from the sunglasses, when the facial features stored in the system are compared with the feature points, the matching degree of the feature points is reduced and the success rate of unlocking is reduced.
At present, many face-based phones that rely on traditional front-facing cameras to unlock the phone, even if they can be unlocked with sunglasses, are realized by ignoring eye information during the feature matching process. This greatly reduces the security of face recognition. , It can be said to be a way to exchange user experience by sacrificing security.
From this point of view, the infrared face unlocking technology used by Xiaomi 8 has higher security and ease of use than traditional mobile phones relying on face recognition solutions of front-facing cameras. It can not only be used normally at night, but also greatly reduce the use of photo videos. Unlock this risk.
Millet 8 uses Liu Hai's full screen design. The fringe area at the top of the screen not only places the handset, front camera, distance sensor, but also incorporates infrared lighting elements and an infrared camera for face unlocking. Compared to traditional mobile phones relying on the front camera Face unlocking, what difference is the infrared face unlocked by Xiaomi 8?
How to work with infrared face unlocked by Xiaomi 8?
The core of infrared face unlocking technology is infrared imaging. At present, there are two kinds of infrared imaging in the mainstream. Objects emit infrared light above absolute zero, and animals and humans emit strong infrared light, while stones, trees and other environmental objects emit infrared light. The light is very weak, and the night vision instrument commonly used in the military is to use this feature for infrared imaging. However, this passive infrared imaging often requires relatively large-scale equipment and instruments, and the hardware cost is high.
Active infrared imaging technology uses a special infrared light source to actively emit infrared light to the human body and receive infrared light reflected from the human body for imaging. The infrared face unlocking of Xiaomi 8 is based on this technical principle.
The reason why the Xiaomi 8's bangs looks wider is because the Liuhai region integrates infrared lighting components, infrared cameras, traditional front-facing cameras, earpieces, and distance sensors.
When you pick up the phone to light up the screen, the infrared illumination element of Xiaomi 8 Liu Haili will send 940nm infrared light to the human face. The infrared light will come into contact with the facial reflection and enter the 3μm infrared camera (IR Camera) for imaging. Millet 8 will process the acquired infrared face image, remove environmental information such as noise in the image, extract 4096 face feature points, compare features with infrared facial data that has been entered in the mobile phone, and then successfully unlock and enter the desktop.
Conventionally relying on the front camera face unlocking technology, the front camera is equivalent to self-photographing the face when lighting up the screen, generating a 2D face image to match and match with the facial data stored in the mobile phone. The infrared face of the millet 8 Unlocking is to use the active infrared light source (infrared lighting element) to light the face, infrared camera to receive the infrared light emitted from the human face to image. Generally speaking, the process of unlocking the face of millet 8 infrared, in fact, can be seen as a 'fill' The process of 'self-portrait' is just the 'fill light' here is invisible infrared light.
What is the advantage of infrared face unlocking?
Not affected by light, all black can quickly unlock.
The traditional face unlocking technology is mainly based on visible light imaging. There are many defects. When the ambient light changes, the recognition effect will drop sharply and cannot meet the actual application environment. For example, the phenomenon of “yin and yang face” occurs when face light is encountered. , it may not be correctly identified.
The effects of light changes on visible light imaging (top) and infrared imaging (downside), from the network
When the phone is unlocked at night and in other dark environments, the unlocking of the face of a traditional front-facing camera can result in a serious shortage of light, which makes it impossible to perform effective visible light imaging, resulting in a very low success rate of unlocking and even unusable.
The infrared face unlocking of Xiaomi 8 will not have such a problem. Whether it is day or night, infrared lighting components will always fill your face with 'fill light', just you can't see it. And look at the infrared camera in Xiaomi 8. 3. Your face is no different from daytime.
Safer, effective against prosthetic attacks
The traditional face unlocking scheme using front camera to take pictures using visible light is often easily unlocked by photos, videos, and even 3D printed masks. The security is low.
The infrared face unlocking of Xiaomi 8 uses the infrared light with a wavelength of about 940nm for imaging, photographs, and the screen for playing face video. The reflection characteristics of the 3D printing mask and the real human face for infrared light are very different. Eventually, they are in Xiaomi. The imaging results obtained by the 8 infrared camera are completely different. For example, when trying to unlock the millet 8 with a photo on the pad, the infrared light captured image is just a Pad... and there is no face information. Thus, the used Infrared Face Unlocking Technology Millet 8 is effective for live detection, with a high level of security.
Wear sunglasses can also unlock, both convenient and safe
Because the infrared light characteristics can penetrate the sunglasses lens, the eye information blocked by the sunglasses can also be normally imaged in the infrared camera. The imaging result and the face data entered by the system can meet more feature points when the features are compared, and the security is more secure. Gao. However, traditionally relying on the frontal camera for face unlocking scheme, due to the large amount of missing eye data from the sunglasses, when the facial features stored in the system are compared with the feature points, the matching degree of the feature points is reduced and the success rate of unlocking is reduced.
At present, many face-based phones that rely on traditional front-facing cameras to unlock the phone, even if they can be unlocked with sunglasses, are realized by ignoring eye information during the feature matching process. This greatly reduces the security of face recognition. , It can be said to be a way to exchange user experience by sacrificing security.
From this point of view, the infrared face unlocking technology used by Xiaomi 8 has higher security and ease of use than traditional mobile phones relying on face recognition solutions of front-facing cameras. It can not only be used normally at night, but also greatly reduce the use of photo videos. Unlock this risk.
