| abstract |
The invention discloses an orthophoto image generation method based on a three-dimensional laser point cloud, comprising: acquiring a target three-dimensional point cloud; preprocessing the target three-dimensional point cloud to generate a point cloud to be projected; Perform segmentation and retain the target to be projected; define the projection surface and projection density parameters; take the projection surface as a benchmark, calculate the projection coordinates of the current point cloud scatter to the ortho plane in turn; calculate the projection boundary of the point cloud ortho image; According to the projection boundary, the image coordinates of each projection point are calculated; and the orthophoto is generated according to the image coordinates. This method can obtain a quick structural diagram or a corresponding orthographic projection image, and perform measurement based on the projection image, which can greatly improve the efficiency of point cloud measurement; it can meet the accuracy requirements of engineering practice and provide certain guidance for the protection of ancient buildings and reference. |