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测绘学报  2015 

侧视地图中建筑物轮廓线提取的三维城市模型法

DOI: 10.11947/j.AGCS.2015.20140662, PP. 1036-1041

Keywords: 建筑物轮廓线,三维城市模型,侧视地图,深度缓冲区,颜色缓冲区

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Abstract:

针对城市侧视地图上建筑物轮廓线主要依靠人工交互提取,成本高昂、效率低下且精细度和准确度有限的问题,提出了一种任意视角侧视地图中建筑物轮廓线的自动提取方法。采用深度缓冲区分割算法获取单个建筑物对象的颜色缓冲区,顾及了存在建筑群的情况和建筑物密集区域的遮挡问题,再基于颜色缓冲区追踪建筑物轮廓线。为了保持遮挡一致性且便于匹配提取出的矢量轮廓线与栅格侧视地图,本文还提出了基于投影空间分块加载三维城市模型的方法。最后,以武汉市典型三维城市模型数据为例,证明了该方法的有效性和可靠性。

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