In fact, it stands to reason that AR technology is more difficult than VR technology, but we often encounter it in our lives.

The so-called augmented reality (AR) is a new technology that "seamlessly" integrates real-world information and virtual world information.

It is to apply the virtual information to the real world and be perceived by human senses, so as to achieve a sensory experience beyond reality through related technologies, such as visual information, sound, taste, touch, etc., which are difficult to experience within a certain range of time and space in the real world.

To put it simply, it is to superimpose the real environment and virtual objects in real time on the same screen or space at the same time.

This may be a bit abstract, but let's take a few simple examples. For example, many people like to use the jewelry in the beauty camera, through the camera to identify people's faces, and then correspondingly put a cartoon blush on your face, or bring you a scarf, hat, glasses and other things, real-time display in the camera screen, this is a simple AR technology.

Another example is that it is often seen nowadays to point the camera at a building, or a specific pattern, and then flash a video of the interpretation in the frame, which is also an AR technology.

Or, many airplanes and fighter jets have a green or purple screen in front of the cockpit, which is called a head-up display.

To put it simply, the CRT (picture tube) is formed through a lens to form a virtual image at infinity, and the combined glass (transflective and semi-reflective glass) is folded to superimpose this virtual image with the real scene ahead, so that the pilot can see the flight and tactical character information displayed by the CRT without delaying the view ahead.

So this technology can also be seen as an AR technology, including the helmet display (helmet-assisted aiming system) in the helmet worn by the fighter pilot, which is actually an AR technology.

In terms of real consumer-grade civilian AR glasses, the development of the entire market is still relatively slow. In addition to the G-song glasses launched by the earliest G-song, several companies have launched several so-called AR glasses, but the gimmick is far greater than the actual significance.

Although many companies claim to have developed new VR glasses products, there is no real product that can be put on the market and used by the public.

A lot of it is playing with concepts, or using this gimmick to play the capital numbers game. So as with VR, there was a very serious industry bubble. It's as if you can fly if you get involved with the word AR, and a lot of things are labeled with this label.

Later, as the market and capital gradually calmed down, the industry slowly fell silent. Until recently, with the development of technology, it has slowly begun to make new improvements.

Although there has been great progress in this field in recent years, it is still difficult to solve several problems in AR technology and put it on the market for large-scale commercial use.

First of all, the first difficult problem is display technology, which is the most important thing in the entire AR technology, and it can be said that it is the foundation of the entire technology.

In order to realize wearable AR glasses in the true sense, it is necessary to solve this display technology problem. Unlike VR, which is immersed in isolation from the outside world, AR has a very close connection with the outside world.

To put it simply, the screen must be transparent, so that people can see the outside world clearly, and at the same time, they can see the virtual screen information displayed on the screen.

There are three ways to achieve this effect, and only two are commonly used today.

First of all, the first is similar to the way a mobile phone camera. The screen is still the kind of ordinary screen we use, but it is connected to the camera, and the camera takes pictures of the outside world in real time, so that people can see things in the outside world indirectly.

Then add some virtual screen information on the screen, which also achieves the effect of superimposing the real environment and the virtual picture.

The second is also the way that everyone imagines in the ideal state. That is the use of transparent display screen technology, so that people can directly see the real environment outside, but also see the virtual picture in the transparent display screen. Thus superimposed to achieve a virtual reality effect.

To put it simply, some virtual images can be displayed in a piece of transparent glass, and the two images can be fused through a tracking system and mobile computing technology to achieve an augmented reality effect.

As for the third one, it is currently only in a state of theoretical assumption. To put it simply, through brain-computer technology, the virtual picture is directly applied to the human optic nerve or the eye through electrical signals, so that what you see naturally has an augmented reality effect.

However, this technology is only in the theoretical stage, and it is difficult to implement it at present. And there is a very real and troublesome problem with this technique.

If this technology is implemented, it is possible that people will not be able to distinguish between real and illusory things, which will lead to a series of serious problems.

Although there is still a long way to go before this technology can be realized, there are already experts and some people who have proposed to ban the development of this technology. So there are far more people arguing about this technology than there are people developing it.

Without mentioning the third technique, let's just talk about the first two. Both approaches have their advantages and disadvantages, but either one is currently difficult to implement.

The first method seems simple, but it actually relies on ultra-high image processing performance. And the image captured by the lens is always different from what we see with our human eyes, so the wearer may feel uncomfortable or even dizzy.

In addition, there is a delay between the picture and the real environment, and although this delay can be minimized, it still cannot solve the problem that the real environment and the display screen cannot be optimally matched, especially in a high-speed mobile environment.

The biggest problem of the second method is that in the transparent display screen technology, the screen must first be transparent enough, that is, it must not affect the normal vision of people.

Secondly, in terms of virtual screen display, it is not only required that the picture quality of the screen should be clear and delicate, and the resolution should be high. Because it is a transparent display, it should be displayed normally in both high-brightness and low-brightness environments.

The so-called high-brightness environment means that in a strong light environment, the wearer can clearly see the display screen on the transparent screen. This sounds easy, but it's actually difficult, and you should know that some of today's screens often can't see clearly in bright light environments.

Low brightness refers to the ability to see the content of a transparent screen even when there is no light. Because it is transparent, it can't be filled with light, which all relies on the pixel self-emitting in the transparent screen, a bit like the LCD display has no backlight plate.

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