Distance Field Visualization and 2D Abstraction of Vessel Tree Structures with on-the-fly Parameterization
Distance Field Visualization and 2D Abstraction of Vessel Tree Structures with on-the-fly Parameterization
复制标题
具有动态参数化的血管树结构的距离场可视化和二维抽象
DOI：
10.2312/vcbm.20191251
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
K. Lawonn
中科院分区：
文献类型：
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作者：
N. Lichtenberg;Bastian Krayer;C. Hansen;S. Müller;K. Lawonn
在本文中，我们对血管结构的可视化做出了贡献。基于骨骼输入数据，我们提供了血管系统的2D和隐式3D相结合的可视化，即用于说明性可视化的参数化on-The-fly。我们使用了一种有效的距离算法，该算法从三角形创建距离域(fifield)，并对其进行扩展以处理骨架树数据。球面追踪这个体积允许以fl可伸展的方式可视化血管系统，而不需要重新计算体积。经常应用于血管可视化的说明性技术通常需要纹理坐标。因此，我们对基于对象的算法进行了改进，提出了一种基于图像的分层优化过程，允许以帧相关的方式获得周期性纹理坐标，并适合血管结构的隐式表示。除了三维表面可视化，我们还提出了一种简单的布局算法，该算法将2D参数化应用于骨架树节点。此参数可用于对血管系统进行颜色编码或绘制2D概览图，以突出骨骼的分支拓扑。我们将在3D空间中完成的测量传输到2D绘图，以避免3D表示中的视觉混乱和自我遮挡。3D和2D视图之间的视觉链接通过颜色代码和纹理图案建立。我们的管道的潜力在几个典型的应用场景中得到了展示。
In this paper, we make contributions to the visualization of vascular structures. Based on skeletal input data, we provide a combined 2D and implicit 3D visualization of vasculature, that is parameterized on-the-fly for illustrative visualization. We use an efficient algorithm that creates a distance field volume from triangles and extend it to handle skeletal tree data. Sphere-tracing this volume allows to visualize the vasculature in a flexible way, without the need to recompute the volume. Illustrative techniques, that have been frequently applied to vascular visualizations often require texture coordinates. Therefore, modifying an object-based algorithm, we propose an image-based, hierarchical optimization process that allows to derive periodic texture coordinates in a frame-coherent way and suits the implicit representation of the vascular structures. In addition to the 3D surface visualization, we propose a simple layout algorithm that applies a 2D parameterization to the skeletal tree nodes. This parameterization can be used to color-code the vasculature or to plot a 2D overview-graph, that highlights the branching topology of the skeleton. We transfer measurements, done in 3D space, to the 2D plot in order to avoid visual clutter and self occlusions in the 3D representation. A visual link between the 3D and 2D views is established via color codes and texture patterns. The potential of our pipeline is shown in several prototypical application scenarios.