【摘要】 文章提出了一种可以通过结构光摄影测量获得特征点云的方法,所处理的数据来自老北京城3D重建工程。结构光扫描的明显特征是扫描得到的模型边缘部分点云几乎都丢失了,比如说房屋的顶部边缘点云。文中提出使用获取的立体像对提取出边缘特征点,并从提取出的边缘特征里面匹配得到同名像点,通过摄影测量交会解算出同名像点的坐标值,得到边缘部分的点云,从而完成对老北京城特征部分的重建。更多还原

【Abstract】 This paper raises a method that can get feature point clouds based on structure light photogrammetry.The distinguishing feature of structured light photogrammetry is that the edge part in the models,such as the edge of housetop and the intersection wall,is lost in the point cloud.Structured light photogrammetry has acquired the stereo image pair of the object,so the information of edges can be extracted from the image.After that,the corresponding image pixels are determined only from the edge extraction result.The 3D coordinates of each corresponding image pixel point pair are calculated using the functions of photogrammetry,and the edge points are acquired.更多还原