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Your First Tutorial to Understand AR/VR

Definitions of AR/VR and Difference

Wiki of VR


As a type of computer simulation system, VR, short for Virtual Reality, can be depended to establish and experience a virtual world. VR leads to the generation of a sense world containing vivid 3D view, sound, touch or smell senses through computer. Based on the highly-authentic simulation environment created by VR technology, users can have remarkably new experience in terms of sound, touch and view senses.


a. Properties of VR

1). Sense of Presence - refers to reality degree users can feel that exists in simulated environment. Ideal virtual environment should reach such a degree that users fail to distinguish reality and simulation.
2). Interaction - refers to users' operating availability on objects in simulated environment and natural degree that users obtain from the environment.
3). Autonomy - refers to movement degree of objects in simulated environment according to real world.


b. Types of VR

1). Immersive VR, also called wearable VR, provides users complete experience of immersion. Depending on HMD (Head Mounted Display) or other devices such as position tracker, data glove and other manual input peripherals or devices. Through offering isolated simulation space integrating sound, view and other senses, immersion VR leads users to be totally involved in a feeling of being there and complete immersion.
2). Easy VR, also called desktop VR, implements simulation through PC and degraded workstation with computer display as a window by which users are able to observe the simulated world. Stereo glasses and 3D controller can be used to achieve sufficient interaction between reality and simulation among display and some input devices such as cursor, trackball and space ball. Since participants aren't fully involved in simulated environment, they will still be influenced by surrounding environment.
3). Distributed VR is a type of VR system based on network connection. Multiple users are connected together through computer network and participate in virtual space to go through virtual experience so that virtual reality can be improved to a higher level. In distributed VR system, multiple users are capable of observing and operating the same simulated world through network to achieve cooperative work. A typical application of distributed VR lies in on-line game that is popular around the globe. Numerous players communicate and fight with each other in the same simulated environment to make simulated story go on and on.


Wiki of AR


AR outperforms VR in that it goes beyond simulation of a real world. What's more, AR takes advantage of the simulation technology to strengthen participants' feel towards authentic environment, that is, to make impossibility or inconvenience in real world come true in simulated environment. Also called mixed reality, AR adds virtual information to the real world through computer graphics and visual technology so that authentic environment and virtual objects can appear in the same picture or space.


Properties of AR

1). Information integrity of authentic world and virtual world - Different from full view established by VR, AR depends on mutual interaction between realities, containing both reality and virtuality.
2). Real-time interaction - AR enables to drive interaction between virtual objects and real objects, adding positioning virtual objects to 3D space.


• Difference between AR and VR


Visual presentation of VR blocks connection between human eyes and real world. VR draws a whole new world through devices and displays everything that is fake or simulating. Visual presentation of AR, however, relies on hologram stack when human eyes are connected with authentic world to strengthen visual presentation. In a word, VR is mixture of reality and simulation.

Applications of AR/VR

As an integration of multiple technologies, AR/VR will be receiving remarkable application prospects owing to their strong embodiment. As a result, AR/VR has been widely applied in industries such as game, movie and television, medical care, military and aerospace, education and commercial.


Application of VR for Medical Care


When it comes to applications in medical care, VR is available in medical colleges or universities for its key role in medical research, training and practical training. It is beneficial for training cost reduction. For complicated operations, simulations can be carried out in advance with VR in order to find optimal operation scheme, which is beneficial for doctors' proficiency degree improvement.


Application of VR for Amusement


In terms of VR applications in amusement, it dramatically increases enjoyment of amusement due to its involvement and interaction.


Application of VR for Mil/Aero


Simulated gunfight is available in VR game, which is actually simulated from authentic military situations. Current VR technology is capable of simulating war scene, weapons and staff and implementing simulated exercise. Furthermore, battle progress can be vividly simulated and possible conditions on battle can be estimated.


Space flight can be simulated by combining VR technology and simulation theory. Simulated space shuttle is applied to emulate possible-occurred issues in space flight so that space flight efficiency will be improved with cost greatly reduced. VR technology has been applied to multiple research projects carried out by NASA, including space station cupola training, microgravity movement and ergonomics and earth and space science etc.


Application of VR for Education


The foremost application of VR technology lies in that in education. It's easier for students to understand new knowledge and new content with the help of VR technology that is capable of converting abstract content into visual content. All kinds of simulated laboratories with VR technology are beneficial for cost reduction and limitation breaking. Students are able to complete experiments in simulated laboratories and to obtain the same effect as them in authentic laboratories.


Application of VR for Commercial


Combination of VR technology and computer graphics can be used for establishing simulated shopping environment for customers who are able to experience simulated shopping just like in real shopping malls.


Sample Application of VR/AR


Application of Virtual Reality and Augmented Reality | PCBCart

Issues of AR/VR

Insufficient content, low quality - There are few VR sources that aren't independently arranged by leading Apps. Moreover, VR content is difficult to be found since it is buried too deep. Furthermore, few interactive elements are available so that users have bad visual experience.


Lack of standard - Lack of standard results in that some applications fail to be matched with suitable configurations and users' experience is therefore compromised.


Calling for high demands on hardware - VR technology calls for configured hardware devices and sometimes it even brings forward stringent requirement for equipment performance, which is bad for the popularity of VR technology in people's daily life.


Low comfort of interactive experience - Users tend to have a slight headache when wearing VR devices due to human's physiological structure and low performance of devices.


Lack of innovation - Although VR technology has been applied in a lot of industries up to now, it covers just a limited range of industries, requiring more innovative schemes that'll push it into more applications.

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