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Muti-projector and Mobile-projector-based Augmented Reality Techniques

Author: LiuYiRan
Tutor: YangXuBo
School: Shanghai Jiaotong University
Course: Applied Computer Technology
Keywords: Iterative compensation Luminosity compensation Luminosity fusion Multi - projection system Dynamic light compensation
CLC: TP391.41
Type: Master's thesis
Year: 2010
Downloads: 133
Quote: 2
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Abstract


Augmented reality is a cutting-edge technology in virtual reality. With the increasingly low cost of visually related to the development of cutting-edge technology and cameras, projectors and other hardware-based projector camera system will bring many other display devices do not have fun, and ultimately change people's lives. Projection display technology is that theoretically can be imaged at any surface. Almost unlimited expansion visual range by increasing the number of projectors, and any display resolution, immersive user experience, a hot augmented reality technology research at home and abroad. This paper studies under the conditions of the projector augmented reality technology. Luminosity compensation based on a single projector, on the surface with a texture and color, to compensate for projection display. In a multi-projection system, since the multi-projector brings the area covered by each pixel in the overlapping area photometric inconsistencies camera increases and other problems, the luminosity compensation technique of direct sampling of a single projector, easily resulting in failure or the effect is not satisfactory luminosity compensation . Existing photometric consistency algorithm, luminosity attenuation projection overlap region, but the actual effect is a bit overkill, overlap regions but too dark. Dynamic light compensation this field basically no predecessors to get involved in moving the projector. For the first two problems above, we propose a set of solutions, conception and realization of a single-camera multi-projector system, the system uses a camera sampling the environment data? Projector parameters, using multiple projectors to common display. In the third chapter, turn on the system geometric correction, photometric compensation and luminosity consistent with the principle and the realization of the three functions. Mainly on the establishment of the mapping between projector image space and camera space, the single projection compensation model projection environment parameters to obtain, and the entire compensation algorithm process, as well as the method of calculation of the attenuation coefficient of multiple projectors overlap region between pixels. In the fifth chapter, this paper will describe the overall system architecture design ideas, and to compensate for the effect of multi-projector Finally, the effect of integration, and ultimately the effect of integration. These picture effects and data analysis show that the system is well above three major functions. The fourth chapter describes the study of mobile projection. Chapter III relates to the content is static, wherein the background, ambient light, the projector external parameters, the user viewpoint are assumed constant. This chapter will examine how to obtain these parameters dynamically changing conditions, changes in the information and more interesting applications. Where ambient light compensation predecessors are not involved in the field, this paper presents the main points of the feasible computing model and compensation, test results will be given in the fifth chapter. Can track the change of the parameters, the user point of view of the outside of the projector, you can bring the more interesting applications. Chapter IV, Section 2 will be involved in research based tracking viewpoint and mobile projector, able to project a virtual three-dimensional object rendering system algorithm and system architecture. The major innovation of this paper are: a single-camera multi-projector system to achieve a geometric correction for multiple projectors, luminosity compensation and luminosity that is able to project an image onto complex surface with a texture, for a fixed viewpoint The user provides a geometric rules, compensation unified image of the background texture, the cast have a wide range of projection projector like a single large image. 2 single-camera multi-projector system to improve the acquisition accuracy of the projection surface reflectance parameters using a convenient iterative way, the compensation effect can be achieved with single projector comparable to the use of multi-projector single camera, only the projection area increase capture 4-6 images. And for multi-projection increased by the amount of any compensation to be addressed through the GPU acceleration. 3 single-camera multi-projector system multi-projector overlap region fusion algorithm improvements have been made to solve the original method of overlapping regional transition obvious problem. 4 given for the first time under the conditions of a single camera of the single projector dynamic light compensation method, the method has the characteristics of the adaptive compensation effect is obvious.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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