Planar Visualization of Treelike Structures
Planar Visualization of Treelike Structures
复制标题
树状结构的平面可视化
DOI：
10.1109/tvcg.2015.2467413
复制
发表时间：
2016
影响因子：
5.2
通讯作者：
A. Kaufman
中科院分区：
文献类型：
--
作者：
Joseph Marino;A. Kaufman
我们提出了一种新的方法来创建树状结构(例如，血管和呼吸道树)的平面可视化，其中对象的形状被很好地保存，从而允许熟悉这些结构的用户容易地识别。基于在树状对象内提取的骨架，首先获得径向平面嵌入，使得不存在会导致最终视图中遮挡的骨架的自交点。然后使用调整骨架节点的角度位置的优化过程来根据指定的观察平面重建尽可能接近原始形状的形状，从而保留了对象的全局几何上下文。使用该形状恢复的嵌入骨架，然后使用调和贴图将对象表面展平到没有遮挡的平面。网格的边界将在展平步骤中进行调整，以考虑网格在凹面上拉伸的区域。然后，这个参数化的表面既可以用作腔内导航期间的导航地图，也可以直接用于审问和决策。深度提示带有灰度边框，以帮助理解形状。使用支气管树、颅血管和下肢血管以及上主动脉数据集给出了例子，并通过用户研究对结果进行了定量评估。
We present a novel method to create planar visualizations of treelike structures (e.g., blood vessels and airway trees) where the shape of the object is well preserved, allowing for easy recognition by users familiar with the structures. Based on the extracted skeleton within the treelike object, a radial planar embedding is first obtained such that there are no self-intersections of the skeleton which would have resulted in occlusions in the final view. An optimization procedure which adjusts the angular positions of the skeleton nodes is then used to reconstruct the shape as closely as possible to the original, according to a specified view plane, which thus preserves the global geometric context of the object. Using this shape recovered embedded skeleton, the object surface is then flattened to the plane without occlusions using harmonic mapping. The boundary of the mesh is adjusted during the flattening step to account for regions where the mesh is stretched over concavities. This parameterized surface can then be used either as a map for guidance during endoluminal navigation or directly for interrogation and decision making. Depth cues are provided with a grayscale border to aid in shape understanding. Examples are presented using bronchial trees, cranial and lower limb blood vessels, and upper aorta datasets, and the results are evaluated quantitatively and with a user study.