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 AR (augmented reality) is a new technology that "seamlessly" integrates real world information and virtual world information.
It takes entity information that is difficult to experience within a certain time and space range in the real world, such as visual information, sound, taste, touch, etc., and uses related technologies to simulate and then superimpose it to apply virtual information to the real world.
Perceived by human senses, thereby achieving a sensory experience beyond reality.
To put it simply, it means that the real environment and virtual objects are superimposed on the same picture or space in real time and exist at the same time.
This may be a bit abstract, so let’s give a few simple examples. For example, many people like to use the accessories in the beauty camera, which recognizes people’s faces through the camera, and then puts cartoon blush on your face accordingly, or
It puts a scarf, hat, glasses and other things on you and displays them on the camera screen in real time. This is a simple AR technology.
Another example is that you can often see it now, pointing the camera at a building, or a specific pattern, and then flashing an interpretation video on the screen. This is also an AR technology.
Or, many airplanes and fighter jets will have a green or purple screen in front of the cockpit. This screen is called a HUD (heads-up display).
Simply put, the CRT (picture tube) images a virtual image at infinity through the lens group, and the combined glass (semi-transparent and semi-reflective glass) folds the virtual image and superimposes it with the real scene ahead, so that the pilot can see the scene ahead without delay.
See below CRT display of flight and tactical character information.
Therefore, this technology can also be regarded as a kind of AR technology, including the helmet-mounted display (helmet-assisted aiming system) in the helmet worn by fighter pilots, which is actually also a kind of AR technology.
In terms of truly consumer-grade civilian AR glasses, the entire market is still developing relatively slowly. In addition to the earliest G song glasses launched by G song, several companies have successively launched several so-called AR glasses, but they are gimmicks.
Far greater than its actual significance.
Although many companies claim to have developed new VR glasses products, there is no product that can actually be put into the market and used by the public.
Many of them are playing with concepts, or using this gimmick to play capital digital games. Therefore, just like VR, there has been a very serious industry bubble. It seems that if you get involved with the word AR, you can fly, many things
They are all labeled with this label.
Later, as the market and capital gradually calmed down, the industry gradually became quiet. Until recently, with the development of technology, it has slowly begun to have new improvements.
Although technology in this field has made great progress 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 problem is display technology, which is the top priority in the entire AR technology and can be said to be the foundation of the entire technology.
If you want to realize truly wearable AR glasses, you must solve this display technology problem. Unlike VR, which is immersed in isolating external information, AR has a very close connection with the outside world.
To put it simply, its screen must be transparent so that people can see the outside world clearly and at the same time, they can also see the virtual screen information displayed on the screen.
There are three methods in total to achieve this effect, and only two are currently commonly used.
First of all, the first one is a method similar to mobile phone camera. The screen is still the ordinary screen we use, but it is connected to the camera, and the camera captures the outside world in real time. In this way, people can indirectly see the outside world.
things.
Then some virtual screen information is added to the screen, which achieves the effect of superimposing the real environment and the virtual screen.
The second method is also the ideal way that everyone imagines. That is to use transparent display screen technology, so that people can directly see the real environment outside, and can also see the virtual images on the transparent display screen. Thus they are superimposed together.
, to achieve virtual reality effects.
To put it simply, some virtual pictures can be displayed on a piece of transparent glass, and the two pictures are fused through the tracking system and mobile computing technology to achieve an augmented reality effect.
As for the third type, it is currently only in a theoretical state. Simply put, it uses brain-computer technology to directly apply virtual images to people’s optic nerves or eyes through electrical signals, so that what you see will naturally appear.
An augmented reality effect.
However, this technology is only in the theoretical stage and is currently difficult to implement. Moreover, this technology also has a very practical and troublesome problem.
If this technology is implemented, people may not be able to distinguish what is real and what is illusory, which will cause a series of serious problems.
Although there is still a long way to go to realize this technology, some experts and some people have already proposed banning the research and development of this technology. Therefore, there are far more people arguing about this technology than the people who developed it.
Much more.
I won’t mention the third technology here, but will talk about the first two. Each of these two methods has its advantages and disadvantages, but no matter which one is currently implemented, it is difficult to implement.
The first method seems simple, but in fact it relies on ultra-high image processing performance. Moreover, the images captured by the lens are always different from what our human eyes see, so the wearer may feel uncomfortable or even dizzy.
In addition, there is a delay between this kind of picture and the real environment. Although this delay can be minimized, it still cannot solve the problem of the real environment and the display picture not being optimally matched, especially in a high-speed mobile environment.
The biggest problem with the second method is the transparent display screen technology. First of all, it is required that the screen must be sufficiently transparent, which means that it cannot affect people's normal field of vision.
Secondly, in terms of virtual screen display, not only the screen quality is required to be clear and delicate, but also high resolution. Because it is a transparent display, it must display normally in high-brightness and low-brightness environments.
The so-called high-brightness environment means that in a strong light environment, the wearer can still clearly see the display on the transparent screen. This sounds easy, but in fact it is difficult. You must know that some current screens cannot be used in strong light environments.
Often the picture cannot be seen clearly.
The so-called low brightness means that the display content of the transparent screen can be seen even in the absence of light. Because it is transparent, there is no way to fill in the light. This all relies on the self-illumination of the pixels in the transparent screen, which is a bit like
