Building point cloud model and base map aligned method based on outline
A point cloud model and building technology, applied in the field of computer vision, can solve the problems of the combination of large scenes, weak spatial description ability, and interactive workload that consumes a lot of time and energy.
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[0046] Example 1
[0047] A contour-based basemap registration method for building point cloud models includes the following steps:
[0048] Step 1. Boundary line extraction of building point cloud model
[0049] Step 1.1 The pose estimation of the building point cloud model
[0050] In this embodiment, the open source point cloud data processing library PCL (Point Cloud Library) is used to estimate the normals of the points in the point cloud model. The specific steps are as follows:
[0051] a) Use pcl's StatisticalOutlierRemoval filter to remove remote points;
[0052] b) Use pcl's NormalEstimation method to estimate the normal vector of the point by fitting the tangent plane with the point cloud information near the point;
[0053] Then the normals of all points are clustered at an angle θ. Because the adjacent exterior surfaces of conventional modern buildings have mutually vertical spatial structure relationships, there are three classification vectors while they are approximately v...
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[0121] Example 2
[0122] Such as image 3 Shown is a schematic structural diagram of a base map registration device for a building point cloud model based on contours. It can be seen from the figure that the device includes a contour line extraction module, a point cloud model and a base map registration module;
[0123] The contour line extraction module is used to extract the contour lines of the building in the point cloud model and the satellite base map;
[0124] The point cloud model and basemap registration module is used to correctly place the point cloud model of the building on the satellite basemap according to the point cloud model and the building contour lines in the satellite basemap;
[0125] Preferably, the contour line extraction module includes a point cloud model contour line extraction unit and a satellite base map contour line extraction unit; the point cloud model contour line extraction unit is used to extract the contour lines of the building in the point clou...
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