Graph‐Based Transfer Function for Volume Rendering,Computer Graphics Forum

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Graph‐Based Transfer Function for Volume Rendering
Computer Graphics Forum ( IF 2.7 ) Pub Date : 2019-05-13 , DOI: 10.1111/cgf.13663
O. Sharma ₁ , T. Arora ₁ , A. Khattar ₁

Affiliation

A good transfer function in volume rendering requires careful consideration of the materials present in a volume. A manual creation is tedious and prone to errors. Furthermore, the user interaction to design a higher dimensional transfer function gets complicated. In this work, we present a graph‐based approach to design a transfer function that takes volumetric structures into account. Our novel contribution is in proposing an algorithm for robust deduction of a material graph from a set of disconnected edges. We incorporate stable graph creation under varying noise levels in the volume. We show that the deduced material graph can be used to automatically create a transfer function using the occlusion spectrum of the input volume. Since we compute material topology of the objects, an enhanced rendering is possible with our method. This also allows us to selectively render objects and depict adjacent materials in a volume. Our method considerably reduces manual effort required in designing a transfer function and provides an easy interface for interaction with the volume.

中文翻译：

用于体积渲染的基于图形的传递函数

体绘制中良好的传递函数需要仔细考虑体中存在的材料。手动创建既乏味又容易出错。此外，设计更高维传递函数的用户交互变得复杂。在这项工作中，我们提出了一种基于图的方法来设计考虑体积结构的传递函数。我们的新贡献是提出了一种算法，用于从一组断开的边中稳健推导出材料图。我们在体积中的不同噪声水平下结合了稳定的图形创建。我们展示了推导出的材料图可用于使用输入体积的遮挡谱自动创建传递函数。由于我们计算对象的材质拓扑，因此我们的方法可以增强渲染。这也允许我们有选择地渲染对象并描绘体积中的相邻材料。我们的方法大大减少了设计传递函数所需的手动工作，并提供了一个与体积交互的简单界面。

更新日期：2019-05-13

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