Although the bangs design of iPhone X has been complained, the function of Face ID undoubtedly leads the trend of smart phones again. At present, domestic mobile phone manufacturers Huawei, OPPO, VIVO, etc. are collectively following up on Apple's Face ID technology. Xiaomi has launched the Mi 8 Explorer Edition to support Face ID, which also has built-in 3D sensor elements, but it is different from the iPhone X Face ID.
Apple iPhone X is the first smartphone among global mobile phone brands to use 3D speckle structured light for face recognition and payment. This technology originated from Prime Sense, a company wholly-owned by Apple in Israel for 345 million US dollars in 2013. After 3D structured light was used for face recognition and payment in iPhone X for the first time, this technology has attracted much attention.
On May 31, Xiaomi officially released the Mi 8 Explorer Edition, which uses Face ID, claiming to use 3D structured light face recognition technology, and this is the first attempt of this technology on an Android phone.
Different from the speckle structured light scheme of the iPhone X, the Mi 8 Discovery Face ID uses a mask-based coded structured light, which is independently developed by Israel ManTIs Vision. ManTIs Vision uses mask-based coded structured light to obtain depth information through innovative patented coding technology. The method of speckle structured light is to produce 30,000 discretely distributed infrared lattices for depth detection, while ManTIs Vision adopts the encoding method, and the face presents a regular geometric encoding pattern, which can quickly match the feature points and reduce the amount of 3D information calculation , Reduce the power consumption of structured light algorithm. In addition, with the high frame rate of the camera, real-time dynamic capture of 3D content can also be achieved.
Face ID 3D structured light technology is different from other 2D information-based authentication technologies. Face 3D depth information is safer and more private. This technology carries the digitization of the real world, resulting in some application scenarios that are completely different from traditional 2D imaging. In the future, there will be a wide range of applications in many fields.
In addition to Xiaomi, OPPO is also about to release a new machine that supports 3D structured light. Earlier, on May 21st, OPPO held a "3D structured light + 5G" conference. Follow-up OPPO will hold a Louvre conference on June 19 to officially release the 3D structured light phone Find X.
China Merchants Electronics predicts that the official launch of the Xiaomi Mi 8 Discovery Edition and Find X will have to wait until after July. Among them, OPPO's Find X has relatively sufficient stocks, and there are multiple products with high and low configurations. The expected life cycle sales volume is 200. Ten thousand units will be officially launched in mid-July.
The Xiaomi Mi 8 transparent exploration version will be on sale at the end of July. The current order volume to suppliers is small, but the possibility of subsequent replenishment is not ruled out. The expected life cycle sales are 800,000-1 million units.
In terms of supply chain, according to China Merchants Electronics, compared to Xiaomi's choice of ManTIs Vision, OPPO is cooperating with Obi Zhongguang, while Huawei chose to develop its own algorithm. Since the launch is approaching, the suppliers of OPPO and Xiaomi have been determined, while there is uncertainty in Huawei. There are currently four module factories in competition, of which Qiuti Technology just sent samples in late May. From the perspective of progress, Lite-On and OFIL Technology are more advanced.
Specific to the realization principle of the structured light scheme, Xiaomi’s structured light scheme is a coded structured light, which does not need to use DOE, and the lens only needs a plastic projection lens. The specific working principle is: the Vcsel laser uniformly irradiates the mask, and tens of thousands of light and dark patterns are formed by the mask, and then projected out through the projection lens, and the anti-distortion processing is required during the projection process. Its advantage lies in its simple structure, but its disadvantage lies in its high power consumption.
Apple, OPPO, and Huawei’s solution is speckle structured light. The working principle is that the VCSEL laser irradiates the Diffuser to form hundreds of scattered points, and then the beam is transformed into vertical light through a collimating lens, collimating the optical path of the lens Design is more difficult. The vertical light hits the DOE (diffractive optical element) and diffracts into tens of thousands of scattered points. This scheme is more mature, the structure is relatively more complicated, but the power consumption is lower.
According to Jiwei.com, the Face ID of the Mi 8 Explorer Edition uses the 3D sensing module of OFILM Technology. OFILM Technology has already delivered samples to several major Android customers, and can provide end customers with a comprehensive facial recognition solution with a good user experience, with a high product gross profit margin.
In addition, Fang Jing also revealed that the Laya project of Huawei Mate 20 will also adopt a structured light + under-screen fingerprint solution. It is expected to be on sale in mid-October, with shipments of 1.4 million units in 2018. In addition to the above three, vivo is expected to launch mobile phones with post-toF solutions this year. The module manufacturer is Truly, the ToF Sensor is Panasonic, and the driver chips and algorithms are provided by ADI.
At present, in 2018, domestic mobile phones equipped with 3D Sensing are relatively limited. The penetration of 3D Sensing in the mobile phone industry is still in the early stage, but the potential space is large. In the future, driven by "HMOV", Android phone manufacturers will accelerate the introduction of Face ID. , The industry chain will also benefit simultaneously. As a brand-new human-computer interaction mode, 3D Sensing is worth looking forward to.
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