加速,高质量的折射计算体积图形

Shengying Li, K. Mueller
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引用次数: 19

摘要

我们提出了一个有效的框架,用于具有折射效应的离散采样表面物体的高质量渲染。这需要精确估计折射系数,配合高效准确的表面检测、空间遍历和背景图像采样。我们的框架实现了这些目标,通过采用高质量的基于样条的滤波器,结合一种新的滤波八叉树空间分解,其中预分类的单元与滤波器和体素邻域特征相匹配。在这里,我们从b样条核的非负性中获益良多。最后,我们描述了一种创新的方案,该方案在平坦背景平面上实现了高质量的像素超采样,而无需跟踪穿过折射物体的实际光线。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Accelerated, high-quality refraction computations for volume graphics
We present an efficient framework for the high-quality rendering of discretely sampled surface-based objects with refractive effects. This requires an accurate estimation of the refraction coefficients, paired with efficient and accurate surface detection, space traversal, and backdrop image sampling. Our framework achieves these goals, by employing a high-quality spline-based filter in conjunction with a novel filtered octree space decomposition with pre-classified cells that is carefully matched to the filter and voxel neighborhood characteristics. Here, we benefit greatly from the non-negativity of the B-spline kernel. Finally, we describe an innovative scheme that achieves the high quality of pixel super-sampling on a flat backdrop plane without the overhead of tracing the actual rays across the refractive object.
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