Hole repair method and apparatus for three-dimensional city model, device and readable medium

Abstract

The invention discloses a hole repair method and apparatus for a three-dimensional city model, a device and a readable medium. The method comprises the steps of extracting multiple vertexes of a to-be-repaired hole in the three-dimensional city model; according to the vertexes of the hole, generating a fitting plane used for hole projection, wherein the fitting plane is a two-dimensional plane; according to the fitting plane of the hole, constructing a triangular net of the vertexes of the hole; and filling textures of the vertexes of the hole with textures of known vertexes of a known texture surface to repair the hole, wherein the known texture surface is the same as the hole in shape and size, the known vertexes have the same quantity as the vertexes, and the positions of the known vertexes on the edge of the known texture surface correspond to the positions of the vertexes on the edge of the hole respectively. By adopting the technical scheme, the deficiencies in the prior art are overcome; a hole repair scheme in the three-dimensional city model is provided; and the hole in the three-dimensional city model is repaired, so that displayed information is completer during rendering of the three-dimensional city model.

Description

【Technical field】 [0001] The invention relates to the field of computer application technology, in particular to a hole repair method, device, equipment and readable medium in a three-dimensional city model. 【Background technique】 [0002] 3D city model (3Dimensional City Model; 3D), also referred to as 3D model or 3D model for short, has been widely used in transportation, surveying, surveying and mapping, especially in urban planning and construction after years of research and application. had a certain effect. The 3D city model can show the buildings in the city from a three-dimensional perspective, and the form of expression is very intuitive and rich. [0003] The existing 3D city model is based on the real appearance of the city, and it is restored with high simulation. In practical applications, each textured surface of the 3D city model includes multiple triangular surfaces, and the vertices of each triangular surface have corresponding texture coordinates. When ...

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, when the 3D city model is rendered, it is often found that the data of some areas in the texture surface is lost, and there is no data of the triangular surface, resulting in holes in the 3D city model

However, similar holes have not been repaired in the prior art, resulting in an incomplete structure of the 3D city model

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