基于特征边重构的建筑物化简方法  

Simplification method of building polygon based on feature edges reconstruction

作　　者：尹烁 闫小明 晏雄锋 YIN Shuo;YAN Xiaoming;YAN Xiongfeng(School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, China;Imagesky Remote Sensing Technology Co. Ltd., Suzhou 215000, China;College of Surveying and Geo-Informatics, Tongji University, Shanghai 200092, China)

机构地区：[1]武汉大学遥感信息工程学院,湖北武汉430079 [2]苏州中科天启遥感科技有限公司,江苏苏州215000 [3]同济大学测绘与地理信息学院,上海200092

出　　处：《测绘学报》2020年第6期703-710,共8页Acta Geodaetica et Cartographica Sinica

基　　金：国家重点研发计划(2018YFB0505300)。

摘　　要：针对轮廓模糊建筑物多边形的化简问题,提出一种基于特征边重构的建筑物化简方法。该方法定义了建筑物的主方向和控制其整体结构的特征边,以保持建筑物的规则形态。首先利用统计加权方法计算建筑物的主方向,基于主方向对建筑物执行直角化操作。然后按照特征边的定义检测直角化建筑物的特征边,将特征边组合并抽象出几种局部结构,建立重组规则。最后通过判别特征边组合的空间关系,选择合适的结构重组规则来化简建筑物。结合真实数据进行多组试验,结果表明该方法有效还原了建筑物的直角特征,面积和形状保持良好,适用性强。This paper presents an approach to simplify building polygons with blurred outline.Definitions of main direction and feature edges that control overall structure of building polygon are proposed to maintain its regular shape.Firstly,the polygon is squared based on the main direction which is calculated by statistical weighting method.Secondly,the feature edges are grouped and abstracted into several types of local structures with corresponding reconstruction rules after they are found in the right-angled building polygon according to the definition of feature edges.Finally,the spatial relationship of the feature edges in the structure is distinguished to select the right reconstruction rule to simplify polygon.The experiments under real data shows that the method is able to restore the rectangularity of the building polygon effectively,maintain the area and the overall shape structure,and hold high reliability and practicability.

关 键 词：建筑物化简 特征边 局部重构 直角化 主方向 

分 类 号：P208[天文地球—地图制图学与地理信息工程]