VR Technology introduction and Application status - Dr. Zheng Yujie
1. Introduction to VR technology
Virtual Reality (VR) is a comprehensive technology gradually emerging at the end of the 20th century, involving computer graphics, multimedia technology, display technology, human-computer interaction, sensing technology, artificial intelligence and other fields. It is one of the new generation of information technology with rapid development in recent years. Virtual reality technology has three important characteristics: immersion, interaction and conception. Immersion refers to the feeling that the user is completely immersed in the virtual world. Interactivity refers to the user's manipulability of objects in the simulated environment, and the user can interact with virtual objects in a more straightforward way. Conceivability means that the virtual scene is imagined and constructed by the designer, reflecting the designer's corresponding thoughts, so as to achieve a certain goal. Augmented reality is the application of virtual information to the real field through corresponding technologies and equipment. Real scenes and virtual objects are added to the same screen in real time, so that the reality is enhanced. VR technology can provide users with visual, tactile and other sensory simulations to promote user immersion and guide students to observe at any time and place. Unlike the technology itself, the pure virtual environment can enhance students' perception by providing users with a full range of senses through intelligent means. The application of VR technology provides a brand new way and method to understand the world. It enables human beings to experience or experience events that have already happened or will happen in the future across time and space. It can make people break through the physiological or objective limitations to explore the micro or macro world, and it can also simulate things that are difficult to achieve due to the limitations of conditions, harm more people and other reasons.
2. Application of VR technology
2.1 Application of VR technology in historical and cultural heritage protection
Historical and cultural heritage is the symbol of a nation and has high historical and artistic value. In recent years, the country has increased the protection of historical documents, and launched the "Internet + Chinese Civilization Action Plan" in 2016. It proposed to display digital series of cultural relics with the help of VR and other new generation of information technology, with intelligent terminal platform or on-site display platform as the bearing, so that cultural relics "come alive". This is not only conducive to the protection of historical relics and heritage, but also conducive to the promotion of tourism and cultural industry and social and economic development. At present, VR technology often plays a role in cultural heritage protection in the following aspects.
(1) Digitalization and restoration of ancient buildings and cultural relics
Digitization of cultural relics refers to obtaining the shape, texture, texture, material and other attributes of cultural relics through 3d scanning, panoramic photography, image processing and other technical means, and converting them into digital information for storage, processing and display. The restoration and restoration technology of cultural relics is to use 3d scanning, 3D modeling, VR and other technologies to digitize cultural relics, generate digital twin objects of cultural relics, restore the incomplete or damaged cultural relics, so that the material cultural heritage can reproduce the historical situation, so as to achieve the purpose of cultural relics protection.
(2) Immersive reproduction of historical scenes
VR technology can be used to visually present the historical scenes that have disappeared in front of users. With the help of helmets, VR glasses and other related devices, observers can experience and feel immersive as participants. Virtual reality technology, with its vivid 3D virtual scenes, diversified interactive ways, coupled with the introduction of local historical background and cultural heritage, will make the spectacular and brilliant cultural relics incisively and vividly reappear to the world, so as to realize the scientific and vivid display and inheritance of historical relics and heritage resources.
(3) Digital museum display
Digital museum is to create a virtual 3d digital museum scene through technical means. Visitors can visit at will in the virtual museum, watch the 3d simulation display of various collections in the museum, and view the relevant information of various collections. It has the characteristics of digitalization of cultural relics resources, virtualization of cultural relics, diversified display methods, network, sharing and intelligence of information transmission.
2.2 Application of VR technology in digital restoration of Kaifeng Historical and cultural Blocks
As an important symbol of a city, the historical and cultural district truly records the evolution and historical changes of a city. It is an important material heritage to record the city culture and has extremely high historical, cultural and artistic value. Urban historical and cultural blocks can best reflect the unique characteristics of a city, which is the witness and material carrier of urban development.
(1) To create a three-dimensional digital roaming system of Kaifeng historical and cultural Blocks combining the virtual and the real
Advanced VR equipment and technology, the ancient city of kaifeng major historical and cultural blocks of 3 d modeling and simulation, interactive scenario for constructing virtual historical block, make people can experience through into the historical scenario, let the story of the old kaifeng as the steps of the viewer, let the past famous historical events, people, buildings, etc, and the dialogue and interaction, like back in time, Allowing visitors to experience an immersive journey of heritage discovery and discovery. The 3D digital roaming system can be experienced through Web, mobile communication devices or virtual reality devices, mainly including 720° national intelligent roaming system of ancient urban areas, digital restoration and display of historical and cultural relics in different years, holographic projection technology to resurrect historical celebrities and play through.
(2) Historical and cultural street 3d digitalization to restore cultural and commercial value
Historical relics are non-renewable. VR technology can make perfect visual digital presentation of cultural relics, historic sites, historical and cultural blocks and ancient building technology and production process, so that these vanishing skills can be inherited. Virtual simulation restoration of ancient sites and ancient blocks can simulate restoration of some damaged cultural relics in the process of urban development. Through immersive interaction, it is displayed in museums and historical and cultural areas, which makes up for the sensory defects caused by the damage of cultural relics.
2.3 Application practice of VR technology in college teaching
(1) Construction of VR laboratory in universities
National VR related key laboratories (institutes) include: State key laboratory of computer aided design and shape of zhejiang university, tsinghua university institute of human-computer interaction and media integration, intelligent science department of Peking University institute of visual information processing, virtual reality technology laboratory, institute of computing technology, Chinese Academy of Sciences, Beijing university of aeronautics and astronautics, national key laboratory of virtual reality technology, institute of remote sensing applications, Chinese Academy of Sciences, China (digital earth , Digital City), Institute of Virtual Reality and Visualization Technology, Beijing Normal University, Augmented Reality and 3D Display direction, Department of Information and Electronics, Beijing Institute of Technology, Virtual Reality and Multimedia Technology Laboratory, Southwest Jiaotong University, Human-Computer Interaction and Virtual Reality Research Center, Shandong University, etc.
(2) The role of VR laboratories in universities
VR laboratory can provide professional probation for relevant majors, so that students are familiar with and understand the latest science and technology, keep pace with the development of The Times, and provide guidance and direction for professional courses learning and future employment. VR lab can meet the needs of virtual reality and augmented reality practice in related professional production practice and professional practice. The course experiment and course design (practical training) led students to focus on learning and practicing key technologies such as fast 3D modeling and realistic fast rendering of virtual environment, real scene simulation and simulation, integration of various digital media, and augmented reality. And the application of these key technologies in real environment simulation analysis, game animation, digital media, virtual simulation products, virtual reality content generation, display, management and release, etc. Graduation design is the science and engineering students, the collective is an important tache in practice teaching, is a four years for students to study the effect of effective examination means, through the graduation design and thesis writing, is a good way to cultivate and exercise students integrate theory with practice and comprehensive ability to use professional knowledge to design and develop VR lab for students to complete the graduation design provides a good experimental platform and the environment.
2.4 Application and practice of VR technology in college education
At present, we are at the historical node of "three-dimensional upgrade of digital information", where both disturbance and opportunity coexist. VR technology integrates artificial intelligence, sensing technology, robotics technology, vision technology, human-computer interaction technology and other science and technology. The whole process introduces motion recognition, image recognition, speech recognition, AR algorithm cloud storage and other technologies. Its immersive interactive experience is rapidly expanding to the field of education. For the knowledge imparts and the study practice efficiency has brought the great leap. Technology empowerment. In recent years, universities and relevant enterprises and research institutes focus on research and development, and continue to expand education modes, teaching methods and richer practical application scenarios through VR technology.
Decades have passed since VR technology was proposed, and it has been applied to more and more industries and fields. For example, in the field of historical and cultural heritage protection, cultural relics are displayed through digital series of products to make cultural relics "come alive", which is not only conducive to the protection of historical relics and heritage, but also conducive to promoting the development of tourism and cultural industry and social economy. In the teaching field of colleges and universities, VR LABS are constructed to meet the needs of virtual reality and augmented reality in production practice and professional practice of relevant majors. In the field of higher education, immersive interactive experience has brought a great leap in the efficiency of knowledge teaching and learning practice.
At present, with the further development of technology, VR technology will be further improved, which will be a blessing for various industries. Therefore, our country must strengthen the research, seize the initiative, establish our advantage in the future competition, and use these technologies to benefit mankind, to achieve the great rejuvenation of the nation.