2 results about "Physical geometry" patented technology

This application provides a method, apparatus, device, and storage medium for reconstructing a 3D Gaussian scene based on the geometric constraints of a mesh tangent plane, relating to the field of computer vision technology. The method includes: acquiring an image sequence of a target scene and reconstructing the initial geometric topology of the target scene; constructing a local tangent plane coordinate system attached to a triangular mesh, and parameterizing the center of the 3D Gaussian primitives as coordinates in the local tangent plane coordinate system; rendering and iteratively optimizing the parameterized 3D Gaussian primitives to update their attributes; during the iterative optimization process, adaptively controlling the density of the 3D Gaussian primitives attached to the mesh surface based on the geometric curvature information of the triangular mesh; and generating a 3D scene model with a triangular mesh as the geometric skeleton and optimized 3D Gaussian primitives as the appearance representation. This application achieves high-fidelity reconstruction of both visual appearance and physical geometry, and improves the resolution capability of complex textures while maintaining real-time rendering speed.

The application relates to an electronic chart topology automatic construction method, and belongs to the technical field of marine surveying and mapping. The method comprises the following steps: constructing an element table, an attribute table and a spatial geometry topology table according to the geometric type of elements; importing element, geometry and attribute data into corresponding table structures; performing a de-duplication processing based on a buffer threshold on a point topology table; breaking and reconstructing curves intersecting with the point buffer in the curve topology table; merging overlapping curves in the curve topology table; and merging overlapping surfaces in the surface topology table. The application realizes the topology consistency construction of the elements of the electronic chart at the physical geometry level, meets the S-101 standard requirements, has the characteristics of flexibility, openness and easy integration into a basic geographic information platform, and effectively improves the automation degree and data quality of the production of the electronic chart.