Advanced Volume Visualization Techniques

先进的体积可视化技术

• 批准号: 0541113
• 负责人: Charles Hansen
• 金额: --
• 依托单位: University of Utah
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-02-01 至 2010-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0541113&HistoricalAwards=false
• 关键词: Advanced; Volume; Visualization; Techniques

Advanced Volume Visualization TechniquesPI: Charles Hansen, School of Computing, University of UtahCo-PI: Sarah Creem-Regehr, Dept. of Psychology, University of UtahDirect volume rendering has proven to be an effective and flexible visualization method for interactive exploration and analysis of 3D scalar fields. The ability to analyze 3D volumetric data sets is crucial to the success of large-scale simulation. This research will increase the analysis and understanding of volumetric data through more faithful rendering methods that take into consideration the interaction of light with the volume itself. The research will investigate a new interactive volume shading method that incorporates global illumination effects and is robust for lighting of volumetric materials. Such an illumination model will more effectively bring out data characteristics for analysis and will be more effective for multi-field visualization than current shading methods.While direct volume rendering is widely used in visualization applications, most, if not all, of these applications render (semi-transparent) surfaces lit by an approximation to the Phong local surface shading model. This shading model renders such surfaces but it does not provide sufficient lighting characteristics for good spatial acuity. To improve an illumination model for volume rendering, it is necessary to investigate approximations to global illumination using novel volumetric shading techniques. This investigation is producing in an effective model that captures physical effects of classified volumetric data such as back-scattering, inter/intra-surface illumination, and better forward scattering. The success of this project is being measured by applying the new techniques to multi-field visualization in the areas of computational combustion, bio-electric field simulation, multi-modal medical imaging, and scanned multi-modal data for non-destructive testing in which analysis through direct volume rendering is an appropriate visualization methodology. The effectiveness of these new methods will be tested through user studies that will include both perceptual psychologists familiar with perception testing in computer graphics and domain scientists.

高级体视化技术PI：Charles汉森，犹他大学计算学院共同PI：Sarah Creem-Regehr，系。直接体绘制技术是一种有效、灵活的三维标量场可视化方法。分析三维体数据集的能力是大规模仿真成功的关键。这项研究将通过更忠实的渲染方法，考虑到光与体积本身的相互作用，增加对体积数据的分析和理解。本研究将探讨一种新的互动式体积着色方法，结合全球照明效果，是强大的照明体积材料。 这样的照明模型将更有效地带出数据特性进行分析，将是更有效的多领域的可视化比当前shading methods.While直接体绘制被广泛用于可视化应用程序，大多数，如果不是全部，这些应用程序渲染（半透明）表面照亮的近似Phong局部表面着色模型。该着色模型渲染这样的表面，但它不提供足够的照明特性以获得良好的空间敏锐度。 为了改善体绘制中的光照模型，有必要研究使用新的体着色技术来近似全局光照。这项调查是在一个有效的模型，捕捉分类体积数据的物理效应，如后向散射，表面间/内照明，更好的前向散射。该项目的成功是通过将新技术应用于计算燃烧，生物电场模拟，多模态医学成像和非破坏性测试的扫描多模态数据等领域的多场可视化来衡量的，其中通过直接体绘制进行分析是一种适当的可视化方法。这些新方法的有效性将通过用户研究进行测试，其中包括熟悉计算机图形感知测试的感知心理学家和领域科学家。