Study On Technology Of IA-based MVR And Its Navigation Application In Calamity-dealing

ABSTRACT: Virtual Reality (VR) and its derivative technologies are based on computer with network, and they are influencing hugely humankind to change their working and life styles. They have also become the next generation human-computer interface. At present, two kinds of technology advancement are urging VR and its derivative productions to develop to a new direction that is known as Mobile Virtual Reality (MVR). One kind of advancement is that the computation power of mobile devices, such as Smartphone and PDA, has been enhanced and can take the task of personal mobile data terminal. The other kind of advancement is that the bandwidth of wireless network, such as 3G and Wi-Fi, has been widened. Under this status, this dissertation combines idea of Intelligent Avatar (IA) into MVR, which is named as technology of IA-based MVR (IA-MVR), and begins to be engaged on the research. Moreover, wrong escape path is one of reasons that bring about unnecessary casualty in Emergent Events (EEs), under the background of which this dissertation presents a novel solution to dispose of EEs based on IA-MVR. Two aspects, i.e., study on IA-MVR technology and calamity-dealing navigation using IA-MVR, are all discussed in details. As for the research of IA-MVR technology, three aspects are tackled, i.e., integrated design of IA-MVR, study on key technology of MVR Engine (MVRE) facing to mobile devices and how to realize Third Person Rendering Mode/First Person Rendering Mode (TPRM/FPRM) and rendering of IA. During the complete research process, the following key contents are studied,· On the study of IA-MVR, firstly, this thesis elucidates the concept, basic characteristic and element of IA-MVR. Secondly, IA model facing to MVR is presented, in which IA can gain function and obligation using role. The role can be defined by task and be controlled by the solution of the task. Moreover, this model has also an awareness part and a communication part, by which IA can perceive and feed back to the environment. Thirdly, this thesis designs a complete architecture of IA-MVR. Using the architecture, IA-MVR can realize distributed function and remote services.· On the study of MVRE, firstly, this thesis constructs a kind of MVRE architecture facing to mobile devices. Secondly, it introduces a data processing project based on device-awareness in heterogeneous system, which aims at realizing that many devices can be supported by a set of basic data. Thirdly, a block-member data transfer mode based on interest road is adopted to construct 3D scene graph, and a Road Network Description Language (RNDL) using XML syntax is applied to describe road network. Finally, referring to energy-saving thinking by backlight-dimming, a kind of energy-saving solution that is compatible with IA-MVR is adopted to extend the battery lift based on energy-awareness.· On the study of TPRM/FPRM and corresponding rendering of IA, a method named Over-rendering (O-Rendering) is applied to realize TPRM of scene, in which TPRM map is rendered using texture mode, so better efficiency has been gained. Because O-Rendering cannot distinctly show the position and attitude of IA, in this thesis, therefore, the flaw is remedied though 2D vector graphics (VG) drawn by OpenVG LIB. In order to render IA model under FPRM, combining impostor technology, this thesis adopts distributed rendering technology to realize the aim.· On the study of calamity-dealing navigation using IA-MVR, a kind of mode, in which IA is used as the indication of walking, is presented. The mode is better immersed. To tackle a path-planning problem, a dynamic way-finding solution based on obstacle information slices is used to realize navigation function. Furthermore, awareness function, i.e., distance awareness and speed awareness, is injected into IA so as to enhance its human characteristic. Finally, about the sending problem of path data, the thesis optimizes the path data as a Set of Smell Point (SSP) for reducing the occupation of wireless bandwidth.This dissertation creates a universal IA-MVR system and uses it into calamity-dealing navigation. So, the feasibility of IA-MVR technology is validated and practicability of IA-MVR technology is incarnated. The significance of this thesis is not only limited to the level, and the method for calamite-dealing navigation is similarly significant to intelligent community navigation and tour. Furthermore, the potential application domains of IA-MVR technology include mobile virtual hospital, mobile virtual classroom, other MVR-based applications, and so on.