体数据可视化传递函数研究

Survey on Transfer Functions in Volume Visualization

体数据可视化被广泛地用于理解复杂的科学、工程、生物医学等领域的模拟和观测数据.体数据可视化的核心问题是传递函数的设置,用户通过设置传递函数、定义数值到颜色和不透明度等可视特征,然后由体可视化算法生成图像结果.文中从基于图像的传递函数、以数据为中心的传递函数、传递函数设置的用户界面和交互方式等角度,对传递函数的基础和研究现状进行综述,并对传递函数研究的前景进行了展望.

For understanding sophisticated volumetric data, volume visualization is widely applied in many area ranging from scientific research, engineering, and medical diagnosis. Transfer functions, which are often specified by users, transforms the data values into colors and opacities, thus the rendering algorithms can generate the volume visualization results. In this paper, we summarize the basics and the state-of-the-art research works on transfer functions, including data-centric and image based transfer functions, as well as the novel user interface for transfer function design. We also discuss the future research in transfer functions.