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Shear-rotation-warp volume rendering

机译:剪切-旋转-扭曲体积渲染

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Shear-warp volume rendering has the advantages of a moderate image quality and a fast rendering speed. However, in the case of dynamic changes in the opacity transfer function, the efficiency of memory access drops, as the method cannot exploit pre-classified volumes. In this paper, we propose an efficient algorithm that exploits the spatial locality of memory references for interactive classifications. The algorithm inserts a rotation matrix when factorizing the viewing transformation, so that it may perform a scanline-based traversal in both object space and image space. In addition, we present solutions to some problems of the proposed method, namely inaccurate front-to-back composition, the occurrence of holes, and increased computation. Our method is noticeably faster than traditional shear-warp rendering methods because of an improved utilization of cache memory.
机译:剪切扭曲体积渲染具有适度的图像质量和快速的渲染速度的优点。但是,在不透明传递函数发生动态变化的情况下,由于该方法无法利用预分类的卷,因此内存访问的效率会下降。在本文中,我们提出了一种有效的算法,该算法利用内存引用的空间局部性进行交互式分类。该算法在分解视图变换时会插入一个旋转矩阵,以便它可以在对象空间和图像空间中执行基于扫描线的遍历。另外,我们提出了所提出方法的一些问题的解决方案,即不正确的前后组合,孔的出现和增加的计算。由于改进了对缓存的利用率,我们的方法明显比传统的剪切变形渲染方法快。

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