If the iphone's most controversial design has been selected for the past decade, I'm afraid the ' Liu Hai ' on the iphone x is deserved. But even if the ' Liu Hai ' is so criticized, but still let Apple insist on making such a choice, also shows that Apple for 3D structured light technology recognition and attention. In this MWC Shanghai, Vivo released the name Tof 3D Ultra Induction Technology, and 3D structure light can be regarded as ' the same, and are the technology that can affect the future.
So in today's machine room, we're going to interpret this vivo TOF 3D hyper-sensing technology. For today's people, too many secrets and information are hidden in their smartphones: small to the side of some of the most commonly used contacts, large to various financial levels of information. So security seems especially important. Everyone needs a unique password to protect their information. And what's truly ' unique ' is ourselves.
As a result, there is a higher level of security on the phone: biometric identification. It has been five years since 2013, when the iphone 5S successfully spread fingerprint recognition to mobile phones. In these five years, the mobile phone's form, the function that needs to carry is also changing gradually. In the background of full screen, the 3D structure light is gradually connected with fingerprint identification. Compared with fingerprint recognition, 3D structured light can bring more sense-less recognition process, more secure level, and more importantly, 3D structure light is both biometric and can be used to build image information.
As a result, it appears that at this stage, even if the face ID will have a very controversial impact on product design, Apple still insists. We know that the traditional camera for information capture is based on 2D plane information, so the biometric based on the front camera is actually very easy to be deceived by false information. Therefore, when the image from 2D to 3D, only the security features.
Therefore, whether it is 3D structure light or vivo tof, is essentially the acquisition of image depth information.
However, although the implementation of the same purpose, the implementation of different processes, also led to 3D structure light and tof or different.
▲ Pictures from Yole developpement Face ID used 3D structure light by the speckle structure (Light coding) to achieve, within a certain distance, the lattice projector will emit 30,000 random scattered distribution of infrared light to cover a space area, the user's facial access to this workspace, the spot appears different displacement and distortion, The mobile phone will record the user's face in space to draw accurate and detailed depth information map.
And when the user in each recognition, with the new ' depth map ' compared with the standard ' depth map ' in the mobile phone, the mobile phone naturally know that the unlock is not a real user. The tof used by Vivo is the abbreviation of time of Flight (Time-of-flight), through the infrared transmitter continuous emission of light pulses, after encountering a person or object reflection, the sensor receives reflected light, the calculation of infrared ray emission and reflection time difference, thus forming stereoscopic vision. Then the CPU of the mobile phone analyzes the data of the time difference of light to achieve the goal of establishing the human face model.
On the key data, the TOF needs to collect the effective depth information point of 300,000 faces, and the work distance can reach the farthest 3 meters. As you can see, the key to structural light is ' light ', and the key to Tof is ' distance '. So in recognition, 3D structured light needs to create a ' space ', so it requires a minimum of 25mm to identify the baseline, and tof hardly need distance. and the farthest working distance that the Tof can reach is 3 meters, while the best working distance of the structure light is 25-50 centimeters. In addition, 3D structured light and tof are essentially acquiring depth information for objects in space, so vivo tof 300,000 does more depth information than the 30,000 points in the iphone x, which is really helpful for the details of the edges of the stereo image.
Therefore, from the perspective of technical conversion to function, the current tof is undoubtedly more extensible than face ID. And in the ID design, tof camera volume compared to the structure of light more compact, in the Product ID design when the fuselage does not need to achieve stereoscopic vision for the realization of pay longer bangs and larger fuselage interior space.
In general, a set of tof need an infrared transmitter, receiver, camera is enough, do not need face ID so many things. But Tof is not without drawbacks, as a pair of 3D images, tof in two-dimensional (that is, x, Y axis) resolution is not as high as 3D structure light. But there is no doubt that both have reached financial security levels, which is sufficient for the average user.
And Vivo has also claimed to be working with the micro-letter agreement. PS: Here to insert a sentence: In the Vivo TOF 3D induction conference scene shows the direct use of mobile phone 3D modeling, or even 3D printing. So many netizens ask what the difference is with the 3D master from Sony. Sorry we did not find the Sony 3D master information related to Tof, so it is speculated that Sony 3D Master is using XZ1 laser focusing (laser ranging) + Camera + a set of cow x algorithm to complete.
After all, Sony, which has acquired Softkinetic, is already the industry's leading 3D imaging and TOF technology.
The future of Tof
▲ the use of TOF prototype machine can be directly modeled Of course, the technology of the armchair is non-existent. Combined with the current known tof depth information, long working distance features, you can put in a variety of life use scenarios.
For example, through the Tof 3D Super Induction technology for 3D photography, the establishment of a more accurate model of the human body, the other side of the seller of clothing information in advance preset good, users can be directly on the internet to try to wear, and to avoid online buy inappropriate size of clothing. On the other hand, using the TOF camera to model the real object, and then merging the model with other virtual or realistic scenes to create a more sci-fi-oriented Mr Game, is also a major direction for future tof development.
Like modeling for you and your partner, and then putting it on a virtual runway or some other interesting scene.