During volume rendering, gradient will be used both on the procedure Classification and Shading. So rapidity and accuracy of gradient estimation is important to high quality rendering algorithm.
体绘制流程中，梯度在数据分类和明暗计算中都要用到，因此快速准确的梯度估算对高质量的体绘制算法至关重要。
On the basis of this research background, the thesis studies the problem of providing high quality Rendering service according to users' requirements in the situation of distributed cluster Rendering.
在此研究背景下，本文集中研究分布式集群渲染环境下，有效地按照用户需要提供高质量的渲染服务问题。
Some experimental results demonstrate that the algorithm is fast, and can achieve high-quality rendering of PSG .
实验结果表明，该算法能够实现点模型的快速绘制且绘制效果令人满意。
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