Three-dimensional building fine geometric reconstruction method integrating airborne and vehicle-mounted three-dimensional laser point clouds and streetscape images
A 3D laser and building technology, used in 3D modeling, mechanical equipment, combustion engines, etc., can solve the problems of density, occlusion, classifier performance, and few attempts to classify outdoor point clouds.
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[0031] The overall research train of thought of the present invention is as figure 1 As shown, it contains three modules: airborne building model extraction, point cloud and image joint semantic segmentation, model enhancement and update. The basic input data of this research is the airborne lidar point cloud, the vehicle lidar point cloud and the corresponding vehicle image or matching street view image. In the on-board building model extraction module, the buildings in the point cloud will be identified first and used to build a rough building outline model. In the semantic segmentation module, the geometric information contained in the vehicle point cloud will be fused with the color texture and topological information contained in the image, so as to improve the semantic segmentation accuracy of the point cloud. Based on this, the task of the third module is to integrate the architecturally relevant semantic point cloud and the rough outline model produced onboard to incr...
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