For all kinds of cameras for virtual reality shooting, the direction that has always been considered is how to shoot a higher resolution picture, how to stitch the pictures taken by several cameras, how to fill in the dead angle, and how to simulate the shooting mode by algorithm In principle, missing position tracking. But what can be expected is that there will be real digital photography in the future? The scenes will be scanned and modeled in real time.
In this regard, Project Tango and the Structure Sensor used with the iPad are more famous.
After Project Tango is handed over, we feel that it is still quite imperfect, and Google has not released the application in the promotional video on GooglePlay. According to Ziwei's inquiry at the GDC conference in March, the news is that there will be more updates "after a few months".
The Structure Sensor is more convenient to use. You can take a circle around a person, upload it to the cloud server to get the model, and then send it directly to the mailbox, but the volume is a bit large and the accuracy is a bit low.
Therefore, this chip from the California Institute of Technology is particularly exciting: low cost, high integration, and high accuracy. It is called the Nanophotonic Coherent Imager (NCI) and uses less than one square millimeter. Silicon wafers, to achieve the largest depth measurement accuracy of the same kind of equipment on the market at the micron level.
The effect of this level is achieved through an optical characteristic: "continuity". If two light waves are continuous and have the same frequency, and the peaks and troughs completely coincide, it is called a continuous beam. In NCI, the scanned object is irradiated by this continuous beam, and the reflected beam is detected by the detector on the chip and becomes the "pixel" that constitutes the final image. Since the beam reflected from each point of the scanned object will have different frequency, intensity and phase, the final imaging is extremely accurate. Because the continuous beam has a stable and consistent frequency and wavelength, NCI will use it as a scale to measure the size of the object and the distance from the camera, so that each pixel of the final image has intensity and distance information.
At present, this device can only scan some small objects, such as coins? But the creators claim that they can be bigger. If the cost is low, then we will see it in smartphones in the future, at least there is no problem with 3D printing anything. Of course, VR technology will benefit more from it.
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