73 results about "Terrain modeling" patented technology

The invention provides a terrain modeling method and system integrating the geometric characteristics and the mechanical characteristics, and relates to the technical field of environment modeling. The method comprises the following steps of obtaining a color image and a depth image of a detection area, carrying out terrain semantic segmentation on the color image, and fusing a semantic segmentation result and the depth information contained in the depth image at the same moment to generate a semantic point cloud; mapping the semantic point cloud into a grid map under a map coordinate system to generate the corresponding grids, and updating the elevation values and the semantic information in the semantic point cloud to the corresponding grids; and performing ground mechanical property calculation according to the semantic information, updating a calculation result to the corresponding grid, and generating a terrain model. According to the method, the mechanical property parameters are added into topographic factors, and the topographic characterization is innovatively carried out from two dimensions of geometric properties and mechanical properties. The ground pressure-bearing characteristic and the shear characteristic of a non-contact area are deduced in advance in a visual perception mode, and the perception range is expanded.

Method includes calculating a mean z coordinate value for points within the point cloud. An initial set of points is selected which have z coordinate values which deviate from the mean by at least an initial value. Thereafter, a triangulated irregular network (TIN) is constructed using the initial set of points. The method continues by determining if there is a significant point that exists among the points contained within an x, y extent of each triangle. If so, the TIN is updated to include the initial set of points and any significant points determined to exist within the triangles that form the TIN. Thereafter, the method continues by repeating the determining and the updating steps until there are no additional significant points found within the triangles.

The invention discloses a method for constructing a three-dimensional terrain vector model based on multi-beam sonar submarine measurement data, and relates to a method for constructing the three-dimensional vector terrain model with measurement data of multi-beam sonar, which solves the defect that a multi-beam ranging sensor can only provide discrete terrain elevation and can only query terrain parameters at a measurement point. The method is used for non-structural submarine terrain modeling and vector data retrieval. The method comprises the following steps of: acquiring a horizontal coordinate of a sampling point of the terrain of a submarine area and corresponding elevation data; defining a data structure of a terrain triangular net model according to characteristics of multi-beam sonar terrain measurement data; and finally, establishing a Delaunay triangular net vector model according to elevation data of each point of the multi-beam sonar terrain measurement and the data structure of a Delaunay triangular net.