第44卷第3期2023年3月激光杂志LASERJOURNALVol.44,No.3March,2023http∶//www.laserjournal.cn收稿日期:2022-08-25基金项目:江西省教育厅科技项目(No.GJJ181496)作者简介:张玲(1983-),女,讲师,研究方向:装配式建筑。利用SLAM激光扫描提取装配式建筑轮廓方法张玲,祝秀琴,赵巍南昌交通学院,南昌330100摘要:为了获得更为精准的轮廓特征,提出一种利用SLAM激光扫描提取装配式建筑轮廓的方法。通过SLAM激光扫描系统采集装配式建筑点云数据,挖掘集合特征信息获得建筑与断面间距离,从点云曲线中提取建筑外轮廓变化特征点,获得二维平面特征的基础轮廓。使用正交多项式分带滤波区分三维数据与不规则点云,通过反复迭代去除不规则点,得出最接近地面点的正交多项式。根据高程阈值将不规则数据划分为地面点、非地面点,判别估值全部断面中伪距。最后根据修正数据信息,二次采样原始扫描数据,获取出可以映射建筑表面几何特征的三维坐标信息。仿真实验结果表明,所提方法可避免角点模糊导致轮廓信息不精准问题,x轴与y轴的角点检测坐标均方误差低于0.015m,具有较高适用性。关键词:SLAM激光扫描;正交多项式分带滤波;轮廓特征提取;建筑物断面;点云数据中图分类号:TN209文献标识码:Adoi:10.14016/j.cnki.jgzz.2023.03.226MethodofextractingassemblybuildingcontourbyslamlaserscanningZHANGLing,ZHUXiuqin,ZHAOWeiNanchangJiaoTongInstitute,Nanchang330100,ChinaAbstract:Inordertoobtainmoreaccuratecontourfeatures,amethodofextractingassemblybuildingcontourbyslamlaserscanningisproposed.Thepointclouddataofassembledbuildingsarecollectedbyslamlaserscanningsys-tem,thecollectionfeatureinformationisminedtoobtainthedistancebetweenthebuildingandthesection,andthechangefeaturepointsoftheoutercontourofthebuildingareextractedfromthepointcloudcurvetoobtainthebasiccontouroftwo-dimensionalplanefeatures.Theorthogonalpolynomialbandfilterisusedtodistinguishthree-dimen-sionaldatafromirregularpointcloud.Theirregularpointsareremovedbyrepeatediteration,andtheorthogonalpoly-nomialclosesttothegroundpointisobtained.Accordingtotheelevationthreshold,theirregulardataisdividedintogroundpointsandnongroundpoints,andthepseudorangeinallsectionsisjudgedandestimated.Finally,accord...