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The interactivity features in the virtual reality scenes. Based on the technology of communications between Virtual Reality Modelling Language (VRML) and JavaScript, between VrmlScript and HTML, this paper realized the queries of data, properties, pictures, the simulation broadcasting of movies and television, the moving, turning, modifying of the scene objects, enriching the interactivity between...
In 3D laser scanning technology, it is very important for targets to the point cloud registration. Because of the difference of noise, target types and target materials, the difficult extent is different to extract target centre, even the target centre could not be extracted, which affects eventually point cloud registration and its accuracy. This requires scanning job must select rightly targets...
Because it is neoteric technology to three-dimensional (3D) laser scanning which may be applied in protection and reconstruction of ancient architectures, its data acquisition model of field working and error sources need further research. The paper proposes three schemes of field working based three-dimensional laser scanner. They are respectively introducing external coordinate system methods with...
Ancient architecture protection and reconstruction is very important application of Terrestrial 3D Laser Scanning technology (TLS). The paper, after discussing working principle and workflow of TLS and point cloud registration based unit quaternion, analyzed and researched of the algorithm and principle and steps of spherical projection based triangulation, tried to give an effective method and process...
An algorithm was developed to quickly generate a virtual terrain in a parametric 3D based bridge modeling system. The terrainpsilas details was increased by using the fractal theory, a quadtree data structure was used to store triangulation irregular net (TIN) in order to accelerate the retrieval of the triangle containing the given point, the triangle retrieved was subdivided by sparse control points...
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