CAJ | 학술논문

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。
침대성시측시지도상건축물륜곽선주요의고인공교호제취，성본고앙、효솔저하차정세도화준학도유한적문제，제출료일충임의시각측시지도중건축물륜곽선적자동제취방법。채용심도완충구분할산법획취단개건축물대상적안색완충구，고급료존재건축군적정황화건축물밀집구역적차당문제，재기우안색완충구추종건축물륜곽선。위료보지차당일치성차편우필배제취출적시량륜곽선여책격측시지도，본문환제출료기우투영공간분괴가재삼유성시모형적방법。최후，이무한시전형삼유성시모형수거위례，증명료해방법적유효성화가고성。
Aiming to deal with the problem that manual extraction of contours of buildings on oblique view maps are expensive and ineffective with low accuracy and coarse detail,we present a method of automatic extraction of contours buildings on oblique view maps which based on 3D city models.We employ depth-buffers to obtain a building object’s color-buffers concerning the occlusion blocked by other buildings and the existence of groups of buildings,and then we trace building contours based on color-buffers.And in order to keep the occlusion consistency and match the traced contours with the map,we propose loading 3D city models by block on projection plane.Finally,the validity and feasibility of this method are proved through the experiments on 3D city models of Wuhan.