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>> 4 years of silence OPPO find why return to the high-end market
If one word is used to summarize the mobile phone circle in the past year, it must be "Liu Haiping." “Suddenly like a spring night, the city is full of Liu Haiping”. Since last year's iPhone X brought Liu Haiping to everyone, no matter how controversial the issue of Liu Haiping’s beauty and ugliness on the Internet, each of the Android’s flagships hasn’t turned a corner and quickly followed up. , so you see the following picture.
Throughout the history of mobile development, the most is that with the progress of the manufacturing process, the two sides of the screen are made into curved surfaces, or the screen size is elongated. However, no matter how the screen shape changes, the internal shape of the screen has not changed. The "Hai Haiping" adopted by the iPhone X has undergone major changes in the internal form of the screen, and Liu Haiping has also brought about changes in the UI and interaction, and even there is about the design of "U.S. and U.S." Controversy.
It should be noted that Apple’s main new product shipments in the robust product cycle are all in the tens of millions, and the iPhone X is the representative of Apple's 10th anniversary. The reason why Apple made such drastic changes this time is because of the use of Face ID.
In fact, the so-called Face ID everyone should have been familiar with, in the top of the screen between a square inch, placed infrared lens, floodlight sensing original, dot matrix projector, collectively referred to as the original deep camera system. After the user enters the face ID, the system projects more than 30,000 invisible light spots on the user's face, analyzes the user's face, and draws an accurate and detailed depth map for the user's face, drawing a unique face. Spectrum. Based on the data collected by the original in-depth camera, the sensor reads the user's unique facial geometry. When used, verification is performed by comparing the user with previously saved data. This technique is called 3D structured light.
In fact, the so-called Face ID everyone should have been familiar with, in the top of the screen between a square inch, placed infrared lens, floodlight sensing original, dot matrix projector, collectively referred to as the original deep camera system. After the user enters the face ID, the system projects more than 30,000 invisible light spots on the user's face, analyzes the user's face, and draws an accurate and detailed depth map for the user's face, drawing a unique face. Spectrum. Based on the data collected by the original in-depth camera, the sensor reads the user's unique facial geometry. When used, verification is performed by comparing the user with previously saved data. This technique is called 3D structured light.
In general, 3D structured light can be divided into three implementations: ToF (Flight Time), speckle structured light, and binocular ranging.
Binocular ranging is similar to what we usually say “triangulation”. Finally, we solve the triangles by imaging the light spot that falls on the camera. Finally we get the position. Due to the general accuracy, but the algorithm is troublesome, and there are certain requirements for CMOS. Therefore, it does not apply to mobile phones. The most important thing is that there is no way to use it at night, so PASS;
ToF (Flight Time), ToF should be the so-called 3D that is closest to everyone's understanding. In simple terms, it is to send a special signal through the infrared camera of the mobile phone. The depth is calculated by obtaining the phase difference between the transmitted and received signals, so that according to different Time locates different spatial locations of objects.
However, ToF also has problems: temporarily required Camera's volume requirements are relatively large (mainly), and the algorithm is cumbersome, so the power consumption is also relatively large, and is not suitable for mobile phone applications, the same PASS;
The last is the only currently used speckle structure (Light Coding). Within a certain distance, the lattice projector will emit a bunch of scattered light spots (the spot with position information), and then the user enters the first time through the calculation. Spot displacement gives a depth map, which is the "standard map" entered. The recognition is then done by comparing the face depth information map that was originally entered.
Compared to the other two, Light Coding's accuracy and resolution are still acceptable, and the hardware and algorithms that it needs to cooperate with are not too much trouble, so it was finally decided by Apple.
So you can see that at this stage, the cost of using 3D structured light is much higher than that of traditional fingerprint recognition. Why then insist on using 3D structured light instead of fingerprint?
In my opinion, 1. Fingerprinting is fingerprinting. No matter what kind of fingerprinting is done, it has only one biometric function. It is only a difference in form but there is no essential breakthrough. The 3D structured light is not the same, but it also has the function of biometric recognition and the ability to create images. 2, from the interaction, pick up the phone, the phone "know" you, and then unlock, this interaction is more natural and advanced than fingerprinting.
Last week, at a demonstration held by the OPPO headquarters in Shenzhen, a 3D-structured optical video call display based on a 5G network was demonstrated. OPPO believes that in the current environment, if only 3D structured light is used as a biometric function, it will feel somewhat like a "big horse car". Therefore, OPPO combines low-latency real-time transmission of 5G networks, supports high-speed and low-latency features of terminals and terminals, and real-time synthesis of terminals and cloud visual content can realize 3D video, AR, and VR, and even applies holographic technology to On the phone, to achieve some of the scenes in the movie.
Moreover, OPPO stated that it will commercialize 3D structured light technology in mobile phones within six months. If we combine the super Vooc flash-filled and periscope cameras that OPPO has demonstrated in the past two years, it is not just rumors that many users have come back for the long-awaited return of the super flagship OPPO Find series. Coincidentally, Xiaomi also stated that it will be equipped with 3D structure light on the 8th Anniversary Edition of Xiaomi, and it will be the first Android flagship model equipped with 3D structured light. Finally, the 3D structured light also has a huge Android ecology that can be expected in the future.
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