The ultimate literacy sticker: Where exactly is the difference between VR, AR, MR, and CR?
The concept of VR must have been relatively clear for everyone, and it was here that we focused on the differences between AR, MR, and CR. VR VitualReality, virtual reality, is the use of computing devices to simulate the creation of a three-dimensional virtual world, providing users with visual, auditory, and other sensory simulations, with a full sense of "immersion" and "presence." As the saying goes, everything you see is computer-generated and fake. Typical output devices are Oculus Rift, HTC Vive, and more. AR Augmented Reality, Augmented Reality, literally means that “reality†is here, but it has been enhanced and enhanced by whom? Virtual information. The two typical AR systems are the on-board system and the smart phone system. The most discussed AR device is Google Glass. Many cars have added AR applications to their on-board systems. For example, GMC projects virtual images on its windshields. The intention is that drivers do not need to look down at the meter's display and data, but always keep their heads up and lower their heads and heads. Ignore the rapid changes in the external environment, as well as the need to constantly adjust the delay and discomfort caused by the focal length of the eye; or help the driver to better understand the road conditions and improve driving safety. There are actually many applications on smartphones that belong to AR, but people often do not call them "ARs." For example, some LBS (geographic-based services) applications, when you open the application, the phone camera facing a building, the phone screen will appear on the screen of the building, such as name, floor, and so on. For example, FaceU, which was relatively hot in the previous period, is also considered as an AR application. It captures the user's head in real time and superimposes virtual information such as "hat", "rainbow" and "rabbit ear" on the user's head. GoogleGlass allows you to interact with the surrounding environment, will be through the glasses on the "micro-projector" to project a virtual image directly to your retina, so what you see is the real world superimposed on the virtual image. There may be doubts about basin friends, and where does it differ from Hololens and Magic Leap? Don't worry, keep looking down. MR Then the climax comes, most of the potters should be confused with AR and MR (Mixed Reality, also known as Hybrid Reality). Let us first look at a picture. I call this picture "reality-virtuality continuum" for the time being. The interval from left to infinity means "real world," and then to the right is "AR," "Augmented Vituality," until right to infinity means "virtual environment," and "mixed reality." It includes "Augmented Reality" and "Enhanced Virtual." Then the definition of MR is: the real world and the virtual world are mixed together to create a new visual environment. The environment contains both physical entities and virtual information, and it must be "real-time." MR's two representative equipment is Hololens and Magic Leap. How to distinguish between AR and MR? Under the above definition, AR is often regarded as one of the forms of MR. Therefore, in the industry today, for convenience of description or other reasons, AR is also used as a synonym for MR and AR is used instead of MR. Moreover, from the concept preached by the industry, there is no clear line between AR and MR. In the future, it is very likely that AR and MR will no longer be distinguished. MR is only a gimmick played by Hololens and Magic Leap. However, today's so-called "AR devices" and "MR devices" are still slightly different from the applied technologies and display effects. Therefore, we still talk about the differences between these two types of devices (represented by Google Glass). AR equipment and MR equipment represented by Hololens and Magic Leap). In order to understand it, we just explain it plainly. There are two major differences. First, the relative position of the virtual object moves with the movement of the device. If yes, it is an AR device; if not, it is an MR device. For example, wearing a glass of Google, it projects a "weather panel" in front of your left, no matter how you walk in the house, or turn your head, the weather panel is always in front of your left, it is with you ( Or Google Glass's relative position is the same, wherever you go, take it where it is, And what Hololens is like, it will also project a weather panel on the wall of the house, but the difference is that no matter how you walk in the house or turn your head, the weather panel is always on that wall, it It will not move because of your movement (this mainly involves spatial awareness location technology, SLAM, instant positioning and map construction, is one of the most important, the role is to allow the device to obtain the surrounding environmental information in real time, in order to accurately The virtual object is placed in the correct position, so no matter how the position of the user changes, the position of the virtual object can be fixed in the same position in the room. Second, in the ideal state (no loss of information in the digital light field), whether virtual objects and real objects can be distinguished. The virtual objects created by the AR device are obviously virtual. For example, virtual objects played by FaceU on the user's face, virtual information projected by Google Glass and moved by you; and Magic Leap, virtual objects the user sees. It is almost indistinguishable from real objects (here mainly digital light field technology, Digital Light Field. AR equipment uses two-dimensional display to display virtual information, so true and false are easily distinguished; and MR equipment projects the entire four-dimensional light directly to the retina. Field, so the objects that the user sees from Magic Leap and see the real objects are mathematically indistinguishable and without information loss.) Of course, the boundary between "AR equipment" and "MR equipment" is not absolute (even if the boundaries are from the company YY). Here, they are divided into two categories. The main purpose is to let everyone understand the technology they have applied and achieve The effect is different. AR equipment will also use SLAM, digital light fields, and retinal projection technologies (such as Google’s Project Tango) in the future. At this time, AR will evolve into MR. As for the CR, it is the concept that Magic Leap once advocated Say that he is Cinematic Reality, image reality, meaning virtual scenes are as realistic as movie effects. However, it seems that their spokesperson also classified himself as MR. It is also important that Magic Leap is not eye-sighted and should not be misled by the once-worshipping "whale video". Magic Leap also needs a head-mounted display. "Whale Video" should be a special effect in the later stages. Humanity hopes to see a virtual object out of thin air. It has been thinking for hundreds of years. There are many holographic images in the air in various science fiction movies. In fact, if you think about the nature, you know that it is physically difficult to achieve: There is no medium in the pure air that can reflect or refract light. The most important thing to show things is the medium. Finally, what Little K wants to say is that what these technologies call R is not important, and these concepts are not important either. In many cases, some companies are eager to become industry standard makers in order to meet the market demand, and this also appears to be their own. There is a saying called "First-rate companies do standards, second-rate companies do brands, and third-rate companies do products." Companies that invented these concepts are also expected to compete for "first-rate" companies.
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Augmented Reality (AR) explained above, is to add virtual information in the real environment to enhance the real environment; then what is Enhanced Virtual (AV)? The same reason is to add the characteristics of the real environment in the virtual environment. For example, in racing games and shooting games in mobile phones, the direction and azimuth are adjusted by gravity sensing. Then, gravity sensors, gyroscopes, and other devices add features such as “gravity†and “magnetic force†in the real world to the virtual world. in.
