What is Virtual Reality, Augmented Reality, and Mixed Reality

There are many other differences such as the way it is presented:

1. Different presentation methods: Augmented reality (that is, AR) is a computer-based system that superimposes data in the user's line of sight, that is, the combination of virtual data and the real world. Virtual reality is actually VR, and the display logo is to interact with the headset and controller, mainly to put the experiencer in the virtual scene, and the immersive interaction is as if you are there.

2. Different display equipment: AR augmented reality can superimpose data, ** and 3D items into the experience through specific equipment, and information transmission can be realized without a huge helmet like VR virtual reality.

3. The nature of the display content is different: virtual reality is a combination of real-time three-dimensional computer graphics technology, wide-angle (wide-field view) stereoscopic display technology, tracking technology for the observer's head and hand, as well as tactile force feedback, stereo network transmission, voice input and output technology, etc., with multi-perception, existence, interactivity and autonomy. Although virtual reality technology creates a realistic experience environment for the experiencer, it only "moves" the real environment to the VR equipment.

Augmented reality, on the other hand, is a technology that calculates the position and angle of a camera image in real time and adds the corresponding image, also known as "mixed reality". Virtual reality technology shows that the content is actually fake, while augmented reality technology shows content that is superimposed on the real world, which can provide additional digital support for human real life, and can quickly help humans make analysis and choices.

The essence of virtual reality technology is to replace the real world with virtual things, while augmented reality technology is to amplify information on the actual environment.

If we extrapolate from existing systems, it's clear that high-resolution displays will proliferate rapidly: from small handheld or wrist-worn devices to large screens embedded in desks, walls, or floors, they will undoubtedly become ubiquitous. But I and many other computer scientists believe that a completely different type of user interface, called augmented virtual reality, will have a much more profound impact on the future of computers and how we interact with them.

Having the right information at the right time and place is key to all applications of this type. Personal digital assistants (PDAs) such as the PALM and PocketPC can provide timely information using wireless networks and a Global Positioning System (GPS) receiver that continuously tracks the handheld.

However, what makes AR special is the way it presents information: it doesn't have to use a separate display, but it integrates with the user's senses. As the user's attention switches back and forth between the real world and the computer screen, this interface minimizes the extra effort he spends.

In AR, the world seen by the user is literally one with the computer interface.

The integration of virtual reality, augmented reality and other 3D visualization technologies has brought unprecedented changes to product development and manufacturing.

Virtual reality has long entered our lives, and virtual reality is gradually being applied to a wider range of fields, such as virtual live streaming, healthcare, education, engineering, retail, military, clothing, construction, and tourism.

The key skills of virtual reality and augmented reality mainly include:

1. Environmental modeling technology.

That is, the establishment of the virtual environment is equipped with socks, the purpose is to obtain the three-dimensional data of the actual three-dimensional environment, and according to the needs of the application, the corresponding virtual environment model is established by using the obtained three-dimensional data.

2. Stereo synthesis and stereo display technology.

Eliminate the correlation between the direction of sound and the user's head movement in virtual reality systems, while generating stereoscopic graphics in real-time in complex scenes.

3. Haptic feedback technology.

In a virtual reality system, users are able to directly manipulate virtual objects and feel the reaction force of virtual objects, resulting in an immersive feeling.

4. Interactive technology.

The human-computer interaction in virtual reality technology far exceeds the traditional mode of keyboard and mouse, and the use of complex sensor equipment such as digital helmets and digital gloves, as well as three-dimensional interaction technology, speech recognition, and voice input technology have become important means of human-computer interaction.

5. System integration technology.

Since a virtual reality system includes a large amount of perceptual information and models, the integration technology of the system is a top priority. This information includes information synchronization technology, model calibration technology, data conversion technology, identification and synthesis technology, and so on. <>