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利用机载LiDAR点云提取复杂城市建筑物面域

DOI: 10.6046/gtzyyg.2013.03.15, PP. 85-89

Keywords: 复杂城市,LiDAR点云,建筑物提取

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Abstract:

机载LiDAR技术为探测建筑物提供了大量三维点云坐标。为了能从植被中有效识别建筑物面域,首先利用渐进式TIN加密法识别非地面点云,经过移除低于地面3m的点云和孤立点云后生成非地面点云的二值化格网,依据自定义的分割算子打断建筑物和植被间的可能连接;然后通过区域生成算法以高差阈值来聚类二者的面域,并使用大坡度密度阈值来提取建筑物的面域;最后使用形态学闭算子填充面域孔洞并平滑其边缘。选取3个典型的复杂城市区域进行测试,结果显示,各区域的提取质量与完成率均高于91%,表明该算法能够达到自动识别建筑物的目的。

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