What is AR augmented reality/VR virtual reality? What are the differences and connections?

With the popularity of the term "meta universe", AR, VR, and MR technologies associated with the meta universe have also been proposed. The meta universe is a collection of virtual time and space, consisting of a series of augmented reality (AR), virtual reality (VR), hybrid reality MR, and the Internet. Technical AR and VR that can be experienced by the public. What are AR augmented reality and VR virtual reality? What are the differences and connections between the two? I believe there are still many friends who don't understand, so today I would like to share with you the curious figures:

　　 What is AR augmented reality?

AR augmented reality technology is a new technology that integrates real world information and virtual world information "seamlessly". It applies virtual information to the real world through computer and other science and technology, simulation and superposition of physical information (visual information, sound, taste, touch, etc.) that is difficult to experience in a certain time and space range of the real world, Be perceived by human senses, so as to achieve sensory experience beyond reality. The real environment and virtual objects are superimposed into the same picture or space in real time. AR technology not only displays the real world information, but also displays the virtual information at the same time. The two kinds of information complement and overlap each other.

　　 Advantages of AR AR:

1. Realize the coexistence of real world and virtual things.

2. Virtual space is synchronized with real space, with consistent development and stronger interaction.

　　 Application scenarios of AR AR technology:

　　 1. Entertainment : Widely used in the entertainment field, such as Disney Infinity games.

　　 2. Business : AR technology has spawned a series of intelligent applications, which are extremely interesting.

　　 3. Medical field : Doctors can use AR to easily locate the surgical site.

　　 4. Military field : The army can use AR to identify the direction and obtain important military data such as geographical data of the current position.

　　 5. Aviation navigation : Drivers can easily, quickly and accurately obtain relevant information such as geography, weather and climate. Their position is through the AR system, thus ensuring the smooth completion of aviation and navigation work.

　　 6. Tourism and exhibition: While browsing and visiting, people will receive relevant information about passing buildings and view relevant data of exhibits.

　　 What is VR virtual reality?

VR virtual reality technology (VR for short), also known as virtual environment or artificial environment, is a collection of simulation technology, computer graphics, human-computer interface technology, multimedia technology, sensor technology, network technology and other technologies. It refers to the technology of using computers to create a simulated environment that can directly apply visual, auditory and tactile feelings to participants, immerse users in the environment, and allow users to observe and operate the virtual world interactively. VR virtual reality technology deduces the future scene in advance to help people experience the most real feelings in the virtual world.

　　 Advantages and characteristics of VR virtual reality:

　　 1. Immersion

"Immersion" can be understood as immersive. Users not only use their eyes or brains to enter the virtual environment, but also wholeheartedly and completely enter the virtual environment. When users put themselves into the virtual three-dimensional space created by the computer, they can really feel that everything around is real. In this process, virtual reality technology ensures that the body plays an active role in the process of knowledge exploration.

　　 2. Interactivity

Virtual reality technology is equipped with an open and interactive virtual environment. Users of this technology can manipulate the objects given by the computer through 3D interactive devices, and at the same time, the objects in the virtual environment can respond to the environment as they should.

　　 3. Conceptual

VR virtual reality technology experience can create scenes or environments that do not exist in the objective world, broaden users' cognition, diverge users' thinking, and obtain a more vivid conceptual environment

　　 4. Autonomy

VR virtual reality technology allows users to operate and experience completely independently, and feel the happiness of the unknown

　　 VR VR application scenarios:

　　 1. Military application

The military field is the earliest birthplace of virtual reality technology, which was initially used to simulate the flight environment and train pilots. In this virtual environment, pilots can feel that they are in the real flight environment and have the same instruments and equipment as the real environment. Using this method will not threaten human life, nor will it damage the aircraft, thus creating an ideal training mode for pilots.

　　 2. Teaching application

In teaching, virtual reality technology has two main application modes. One is the virtual classroom, which takes students or teachers as virtual objects to form the so-called "virtual university"; The second is the virtual laboratory, which takes the equipment as the virtual object and uses computers to establish objective experimental instruments that reflect the laws of the real world. Experiments conducted in this way can replace many experiments that cannot be completed and time-consuming and labor-intensive experiments. Students and researchers can also use this technology to conduct virtual experiments.

　　 3. Entertainment applications

3D display environment and rich sensory ability make virtual reality technology an ideal video game tool. The games based on virtual reality technology mainly include: intelligence games, combat games and driving games, but the requirements for realism are not very high, so many players are willing to use this technology to compete in a virtual environment or computer intelligence, which to a certain extent greatly meets the entertainment needs of players.

　　 4. Medical application

Virtual reality technology has gradually entered the medical field, such as medical simulation, which can provide students with virtual human anatomy simulation, allow surgeons to perform virtual exercises on some complex operations, and enable medical students to learn anatomy and surgery using virtual patients. For a long time to come, virtual technology will definitely take a big step in the medical field.

　　 5. Energy application

The application of virtual reality technology in petroleum can better show its application characteristics. Its advantages lie in seismic exploration, reservoir simulation and special operation training. With the application of virtual reality in oil fields, oil men can realize the illusion of "going to the underground palace". Virtual dangerous work provides operators with a virtual working environment, which can avoid possible injuries and make training ideal.

　　 The difference between virtual reality and augmented reality:

The difference between AR and VR is that AR augmented reality, VR virtual reality and VR display all false images, while half of the images displayed by AR are true and half are false. AR is used in the medical field for precise positioning of surgical sites, restoration of historic sites and protection of digital cultural heritage to see the virtual reconstruction of the incomplete parts on the site, the industrial maintenance field displays a variety of auxiliary information to users through helmet mounted displays, and online video communication adds some virtual objects such as headwear and glasses to the caller's face in real time while talking Tourism exhibition uses augmented reality technology to view relevant data of exhibits, municipal construction planning, etc. VR is used in training, teaching, games, social networking and other fields; AR and VR Its purpose is to realize tools and means in the real world and virtual world MR And blockchain technology provide the possibility for the realization of the metauniverse.

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