Image-based 3D Walk Around Technology Of Urban Landscape

The technology of the image-based rendering is one kind by way of the real scenery photos or the two dimension image of computer rendering comes to show invented scene , owing to the fact that it is smaller to scene geometry complexity nature relying on , the real time rendering of complicated scene can be realized based on ordinary hardware , thus it become a new research hot spot of computer graphics and the extensive use of the computer visualization , computer vision , multi-medium and virtual reality etc , particularly computer simulation and the true reappearance possesses the great meaning as for this kind of complicated scene in the city landscape .Owing to the two dimension image itself being short of degree of depth information , the now available technology is hard to realize the walk through of continuously scene . Based on the point of image-based rendering , and the technology of virtuality and Reality combining ,it yield the conception of virtual globe and its related thought , and takes the dispersed pixel element mutation as the nucleus , the principle of utilization geometry and graphics , 3D walk around is realized and true sense controls waits has carried on a series of research , has put forward the corresponding mathematical model , and has been in progress the improvement , and has got the better result to the tradition method . It has avoided 3D rebuild and spherical surface projection and anti- projection etc the problems , and people can with any look at from any viewpoint to view the scene of walk through , and does not need any quicken hardware and just has nothing to do with the complexity of scene , and can be realized on the ordinary microcomputer . The chiefly worked and the conclusion is following : (1) Generally analyzing the conception of " virtuality " and " reality " as well as their the most excellent shortcoming has drawn forth the generation of virtuality and reality combination , and has been expounded major content and the technology characteristic of virtuality and reality combination technology by way of the real engineering example .(2) On the foundation of the virtuality and reality combination , and combine the panorama looking around , concentric circles picture technology ,it has yield the conception of virtual globe .( 3 ) Based on three-dimensional space geometric transformation method of the virtual globe image, it has put forward the calculation formula that the walk through beside the virtual globe as well as looks at the technology scheme that ferried between two virtual globe space .( 4 ) Following the analying of mankind's visual sense physiology , and the studying of true sense control , has reached some parameter that influences the true sense control of 3D walk around , thus hopefully raises further true visual sense of 3D walk around .