中文摘要：

提出一种面向对象的激光点云建筑裂缝提取方法，在对激光点云进行分割的基础上，通过计算面片与水平面之间的夹角、面片面积、面片相似度等特征，依据建筑裂缝先验知识，利用面向对象的激屯点云分析方法对裂缝周围面片进行识别，选取建筑裂缝数据进行实验，结果表明，孩方法可对建筑裂缝进行有效提取。

英文摘要：

An object oriented method for building crack extraction based on laser point cloud is proposed.Based on laser point cloud segmentation, the characteristics of angle between horizontal plane and segmenlcd plane, area and patch sinilarity are calculated. According to the prior knowledge of building cracks,object oriented extraction method is used to identify the cracks from point cloud. The experimental results show that the proposed method can effcetively extract the buildling cracks.