Method for extracting surface features from tilt measurement scene

Abstract

The invention discloses a method for extracting ground objects in an inclination measurement scene, which can ensure that the ground objects such as houses and trees are truly separated from the inclination measurement scene and that the edges of the ground objects are neat, and can obtain ground object graphic element information for ray collision detection, Operations such as distance calculation, and attribute information such as feature category, feature number, feature name, and selected status can be added to meet the requirements of power line design. It includes steps: (1) start; (2) set the contour of the object to define the boundary line of the object to be extracted; (3) cut the triangular network by using the contour of the object: use the contour of the object to cut the triangular figure in the scene After cutting, each contour line has a triangle side coincident with it, and there is no triangle side intersecting with the contour line; (4) separate the feature primitive by using the feature outline; (5) access the feature attribute ; (6) end.

Description

technical field [0001] The invention belongs to the technical field of power line design, and in particular relates to a method for extracting ground objects in a tilt measurement scene. Background technique [0002] Oblique photography 3D modeling technology and its application have been a hot topic in the field of surveying and mapping in recent years. Due to its outstanding advantages such as high data accuracy and comprehensive surface coverage, it is widely used in smart cities, smart water conservancy, and smart tourism. [0003] In the design of power lines, it is required to obtain the cross-crossing features such as houses, trees, and roads within the line corridor, measure the distance from these features to power lines, towers, etc., and reasonably select the tower position, tower model, and wiring parameters according to the measurement results etc., to ensure that the verification requirements of the power line design specification are met. However, the origina...

AI Technical Summary

Problems solved by technology

[0004] At present, most of the singulation in the 3D application of tilt measurement scenes on the market is just to superimpose the supporting vector surface on the ground object. On the surface, it looks like a single effect, but in fact, it simply queries the vector surface of the building outline point, and non-true monomer separation

The simple singulation method only directly distinguishes the triangular faces in the scene into ground objects or scenes, but such processing will lead to jagged boundaries of the ground objects, and the boundaries of the ground objects at different precision levels are inconsistent, such boundaries are extremely inconsistent. It is beautiful, and when it is necessary to replace the ground objects with artificial high-precision models, it cannot be seamlessly stitched with the terrain scene

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