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Improved compression of topology for view-dependent rendering (2004)
| Content Provider | CiteSeerX |
|---|---|
| Author | Zach, Christopher Grabner, Markus Graz, Tu Karner, Konrad |
| Abstract | We present a simple and efficient representation to store and transmit connectivity data of view dependent meshes for out-of-core rendering of large datasets. Resident mesh data available for rendering is organized as vertex tree to support real-time visualization of huge models. Our approach is not restricted to manifold meshes and can be used in the presence of non topology-preserving refinement operations as well. In contrast to progressive mesh compression our representation allows selective access to relevant fractions of the refinement hierarchy. After new mesh refinements are received, the update of the resident hierarchy available for display does not rely on known topology in the neighborhood of the patches to be refined. Therefore our approach does not require dependencies. We compare our connectivity coding with an existing framework for efficient transmission of viewdependent meshes and obtained substantially better compression results. 3D model is displayed on the client computer at some level of detail. Pure progressive compression increases the available resolution of the model uniformly, which yields to low visual quality, if the full model is substantially larger than available memory on the client computer (Figure 1(a)). Selective transmission of geometry data depending on the current and expected viewing parameters allow high quality visualization even if only a fraction of the model data fits into main memory (Figure 1(b)). Additionally, it is reasonable to utilize a viewdependent rendering (or level of detail) approach for already resident geometry data, since even the available model will be typically too large to be rendered in realtime at full resolution. Figure 2 illustrates the selective retrieval of geoemtry data for a terrain data set. 1 |
| File Format | |
| Language | English |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | View-dependent Rendering Client Computer Non Topology-preserving Refinement Operation Known Topology Available Resolution Connectivity Data Viewdependent Mesh Main Memory Efficient Transmission Pure Progressive Compression Compression Result Terrain Data Set Full Resolution New Mesh Refinement Refinement Hierarchy Available Model Resident Hierarchy Large Datasets Real-time Visualization Low Visual Quality Huge Model Full Model Viewdependent Rendering Selective Access High Quality Visualization Available Memory Resident Mesh Data Model Uniformly Model Data Fit Geometry Data Selective Retrieval View Dependent Mesh Selective Transmission Efficient Representation Geoemtry Data Vertex Tree Resident Geometry Data Mesh Compression Out-of-core Rendering |
| Content Type | Text |
| Resource Type | Technical Report |
