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美国作业代写:Augmented reality technology

2017-11-01 来源: 51due教员组 类别: Paper范文

下面为大家整理一篇优秀的paper代写范文- Augmented reality technology,供大家参考学习,这篇论文讨论了增强现实技术。增强现实技术是虚拟现实技术的一个重要分支领域。与虚拟现实技术使用户完全沉浸在虚拟世界环境中不同,增强现实技术将虚拟世界与现实世界相结合,把虚拟世界叠加在现实世界并进行互动,通过诸如各种成像眼镜、头戴光学透视显示器、投影仪等多种设备,为用户提供一个由虚拟信息和真实景物构成的混合式场景。

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Augmented reality technology will overlay the virtual world in the real world, so that the experience in the actual integration of the world to interact, is a hot research in recent years. At first, the paper summarizes the research actuality of augmented reality technology, then introduces three key technologies of tracking registration technology, 3D display technology and human-computer interactive technology, finally expounds the application and development of augmented reality technology, and forecasts its further research and development.

Augmented reality technology is an important branch field of virtual reality technology, and it is a hot research area in recent years. and virtual reality technology so that users completely immersed in the virtual world environment different, augmented reality technology will be virtual world with the real world, the virtual world superimposed in the real world and interactive, through such as a variety of imaging glasses, head to wear optical perspective display, projector and other equipment, Provides users with a hybrid scenario consisting of virtual information and real-world landscapes. 1997, the University of North Carolina Ronald Azuma from three aspects: virtual object and real environment combination, three-dimensional display and real-time interaction defined augmented reality. Therefore, augmented reality technology is a kind of computer generated digital graphics animation and other information in real-time overlay display to the real scene, and enable users in the scene mixed with the virtual reality of interactive human-computer interactive technology. Augmented reality technology provides a more natural interaction, enabling people to experience and perceive things in a whole new way, and to help us do some complex work, at the present stage, augmented reality technology has a wider application space than virtual reality technology.

The first research on augmented reality can be traced back to 1968, when the Massachusetts Institute of Technology developed the world's number one optical perspective head-worn display, which can overlay and fuse real-time graphics and real-world scenes, lifting the veil of augmented reality. In 1999, the United States University of Washington and Hiroshima City University of Japan successfully jointly developed the Artoolkit and maintenance of the enhanced reality system, which greatly promoted the popularization of augmented reality technology, and then emerged more related software application and development system. At present, the core algorithm of augmented reality technology, man-machine interaction method and software and hardware Foundation platform are the research emphases of each major research institution. Leading the three-dimensional registration algorithm based on natural plane image and stereo object recognition and tracking the Swiss Institute of Technology Computer Vision Laboratory, the research of human-computer interaction based on augmented reality technology, National University of Singapore Multimedia Interactive Laboratory As well as the development of augmented reality auxiliary automotive machinery maintenance of the German BMW laboratory is to enhance the real technology field of leadership, is recognized as the industry's leading level. With the development of hardware equipment technology and the enhancement of reality technology, the original research field has been expanded to many new fields.

Domestic research on augmented reality technology is comparatively late, and the main research institutions are mostly distributed in universities, such as Beijing Polytechnic University, Zhejiang University, Beijing Aerospace University, etc. With the development of augmented reality technology, our country began to pay more attention to the augmented reality technology, and listed the augmented reality technology as a key research direction of national science and Technology development planning.

The tracking registration technology is to calculate the mapping relation between virtual scene and realistic scene coordinate system by the corresponding algorithm, and to trace and locate the object or image in the real scene according to the mapping relation, which is also the primary goal to realize the augmented reality. At present, based on visual real-time image recognition tracking technology and hardware tracker based matching tracking techniques, or the combination of the two methods.

The technique first extracts the feature points of the plane recognition image, then calculates the user's motion trajectory according to the image back-pushing in the real scene, thus the position and direction of the virtual image or object superimposed are defined. This technique does not require special hardware-aided computing, the precision of registration is high, but the computational complexity is high, so the system delay is increased, because the speed, accuracy and the adaptability of the environment light are high, and the requirement of the identification and identification of the multiple targets can be traced simultaneously, so the non-linear iteration is adopted in most cases. The robustness is not high and the error control is difficult.

The matching tracking technology based on hardware tracker can capture the attitude data of the object in real time by the motion tracking sensor or camera which binds six degrees of freedom or three degrees of freedom, thus finding the relative space position and direction of the object, and then determining the perspective coordinate of the virtual image or object superposition. The matching tracking technology based on the hardware tracker is not limited by ambient light, and the system has a small delay and higher precision, but the equipment is expensive, and the mobile and installation space is limited, which is more suitable to be applied in the augmented reality scene of some professional.

Under conditions permitting, it is possible to combine the real-time image tracking technology based on vision with the matching and tracking technique based on hardware tracker, make full use of the advantages of the two technologies, improve the positioning accuracy of tracking registration, and improve the stability and environment adaptability of the augmented reality application.

In addition to efficient, accurate tracking registration technology, realistic real-world integration of the 3D reality effect is also augmented reality is essential, depending on the efficient 3D display real-time rendering engine and a variety of auxiliary 3D display hardware equipment.

Make full use of the new generation CPU and GPU's multi-core computing ability, the current mainstream 3D display real-time rendering engine can display lifelike virtual object 3D rendering effect in real-time scene, cooperate with scene ray tracing technology and the dynamic effect of a variety of light and shadow, can further enhance the 3D effect display of the actual scene fusion At the same time, 3D display real-time rendering engine can also integrate virtual surround Stereo library and physical effect library, and then simulate the physical effects of virtual objects, such as sound efficiency, gravity, collision, particle, and so on.

Auxiliary 3D display hardware devices can be divided into head-wearing display, handheld display and space display three types of equipment, various types of equipment imaging location is different. The head-wearing display device is imaged about 4-10 centimeters from the user's eye, users need to wear the display equipment in the head, the main disadvantage of the head-wearing display device is low resolution, limited view; Handheld display devices are imaged at a distance from the observer's arm, the main disadvantage of this type of equipment is: small storage capacity, Low processor performance, small scope of sight, and affect the observer arm movement or other operations; Space display equipment can be separated from the human body, in the distance from the human body imaging, to avoid the head and handheld display equipment by the use of human space restrictions, and the system can be used for external AC power supply, easy to solve, can support wide sight, highlighting, High resolution and high contrast image, the main disadvantage of this kind of equipment is: only applies to the fixed scene, the synthesis image accuracy is low.

The natural interaction between users and virtual information in real scene is the goal of augmented reality technology, and the mature human-computer interaction technology is indispensable to achieve this goal. There are many ways to realize human-computer interaction of augmented reality system, from the traditional mouse keyboard interaction to language, gesture interaction, the development of human-computer interaction technology has greatly expanded the application field of augmented reality.

Because of the 3D display effect of augmented reality technology unique fusion, the traditional two-dimensional interface interaction is extended to a more natural 3D space interaction mode, which has a closer and intuitive connection with realistic objects and scenes, and the human-computer interaction method based on voice or gesture is also born. The interaction based on voice or gesture is a novel man-machine interaction means, the action of the user's hand or the voice spoken can be regarded as the interface of human-computer interaction, by capturing the user's various gestures, movements, voice information as the input of interaction, intuitive and natural, and reduce the cost of human-computer interaction, Can allow users to more accurately interact with virtual objects in the real scene, if the auxiliary 3D virtual surround sound, virtual tactile feedback and other multimode interactive technology, can achieve more natural and actual integration of human-computer interaction, which is to further enhance the practical application of human-computer interaction technology direction.

In recent years, augmented reality technology has made remarkable progress, and many fields of research can be combined with augmented reality technology to promote mutual development. Under the active impetus of medical, military, historic relic restoration, network video communication and so on, augmented reality technology shows strong development foreground, which is developing and improving in the aspects of tracking recognition precision, hardware equipment development, real-virtual synthetic display, etc. The emergence of new products has also brought more inspiration and inspiration to the researchers, so as to expand the relevant research and promote the development of realistic technology toward higher, faster and more precise directions. It is believed that in the near future, augmented reality technology will be widely used in various fields to facilitate the more natural and effective man-machine interaction.

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