Incremental Slicing Revisited : Accelerated Volume Rendering Of Unstructured Meshes
Incremental Slicing Revisited : Accelerated Volume Rendering Of Unstructured Meshes
复制标题
重新审视增量切片：非结构化网格的加速体积渲染
DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
Joerg Meyer
中科院分区：
文献类型：
--
作者：
Prashant Chopra;Joerg Meyer
在传统的多边形体绘制硬件支持下，我们加速了非结构网格的增量式切片方法，实现了非结构化网格的近交互式体绘制。与Yagel等人的方法相比，我们的方法使用了更少的内存。[25]，并显著缩短了渲染时间。使用我们的方法，对于某些数据集，例如BLUNT FIN数据集，渲染性能至少提高了400%。我们完全不需要将边缘排序作为一个预处理步骤。此外，我们引入了一种分层的z区域范例，它可以与数据集输入模块相结合来获得单元的深度信息，而不需要额外的计算开销。我们认为，将活动边列表和活动单元列表作为数据结构是多余的，因为在我们的方法中，这种信息是z区域范例中固有的。为了追求精度，我们探索了奈奎斯特的S经典采样定理在对数据集进行切片时的应用，并得出结论：放宽这一要求可以在保持渲染性能的情况下获得类似视觉质量的图像。最后，我们总结了我们的方法的结果，并讨论了如何逐步细化2-流形三角网格(对于平行于视图平面的切割平面的2D切片)如何有助于在体可视化系统中实现额外的交互性。CR类别：I.3.5[计算机图形学]：计算几何和对象建模-表面和对象表示。
We accelerate the incremental slicing method for near interactive volume rendering of unstructured grids with conventional polygon rendering hardware support. Our method uses less memory compared to the method of Yagel et al. [25], with significant improvements in rendering time. Using our method, a rendering performance gain of at least 400% was achieved for some datasets, e.g., the Blunt fin dataset. We completely eliminate sorting of edges as a preprocessing step. Further, we introduce a hierarchical z-region paradigm, which can be incorporated with the dataset-input module to get the depth information of the cells with no extra computational overhead. We argue that keeping an active edge list and an active cell list as data structures is redundant, because this information is inherent in the z-region paradigm in our method. In pursuit of accuracy, we explore the application of Nyquist’ s classical sampling theorem when slicing the datasets, and conclude that images of comparable visual quality can be obtained by relaxing this requirement, while maintaining the rendering performance. Finally, we conclude with the results of our method, and a discussion on how progressive refinement of 2-manifold triangular meshes (for 2D slices of cutting planes parallel to the view plane) can help to achieve additional interactivity in a volume visualization system. CR Categories: I.3.5 [Computer Graphics]: Computational Geometry and Object Modeling – surfaces and object representations.