Viewshed analysis is a spatial analysis method essential for three-dimensional (3D) scenes. Existing methods are unable to rapidly and accurately analyze the visibility of complex fields formed by multiple viewpoints in 3D building scenes. In this study, a parallel multipoint viewshed analysis method for urban 3D building scenes is proposed. First, an algorithm was developed for the field-of-view based viewshed scope construction, enabling pickup and calculation of buildings, then a graphical processing unit based 3D scene depth calculation method was used to determine the visibility index for the complex area formed by multiple viewpoints. Results were visualized using a visibility grading method based on the cumulative visibility index. To evaluate accuracy and efficiency, we applied the algorithm to a building scene in an urban area. Results show that the method is able to compute complex viewshed situations formed by multiple viewpoints in urban 3D building scenes.

中文翻译：

---

一种城市3D建筑场景的并行多点视域分析方法

视域分析是三维（3D）场景必不可少的空间分析方法。现有方法无法快速准确地分析 3D 建筑场景中由多个视点形成的复杂场的可见性。在本研究中，提出了一种用于城市 3D 建筑场景的并行多点视域分析方法。首先，开发了基于视域范围构建的算法，实现建筑物的拾取和计算，然后使用基于图形处理单元的 3D 场景深度计算方法确定由多个组成的复杂区域的可见度指数。观点。使用基于累积能见度指数的能见度分级方法对结果进行可视化。为了评估准确性和效率，我们将该算法应用于城市地区的建筑场景。