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Rapid three-dimensional ground object model construction method

A technology of ground object model and construction method, which is applied in the field of construction of ground object models in 3D scenes, can solve problems affecting construction efficiency, etc., and achieve the effects of strong human-computer interaction, increased memory usage, and good authenticity

Active Publication Date: 2016-09-28
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

[0005] Since the 3D digital earth model includes a large amount of data, it is necessary to process a large amount of data to construct a ground object model based on these large amounts of data, which affects the construction efficiency.

Method used

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  • Rapid three-dimensional ground object model construction method
  • Rapid three-dimensional ground object model construction method
  • Rapid three-dimensional ground object model construction method

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Embodiment Construction

[0027] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0028] Such as Figure 5 Shown, realize the technical solution step of the present invention as follows:

[0029] Step 1. Obtain the latitude, longitude and height data of the ground object, and construct the three-dimensional frame model of the ground object.

[0030] First, select the outline of the building in the scene, expressed in the form of latitude and longitude, which can be a polygon of any shape. Obtain building height information, generate a 3D model, and display the building model in the scene in a three-dimensional form. The contour edge information ContourList of the ground object model is shown in formula 1:

[0031] ContourList={V_1,V_2,V_3,...,V_n} (1)

[0032] Among them, V_i is the i-th point on the edge of the object silhouette, V_i={Lng, Lat, Alt}, Lng is the longitude of point V_i, Lat is the latitude of point V_i, A...

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Abstract

The invention discloses a rapid three-dimensional ground object model construction method. The method comprises the following steps of 1, acquiring a longitude and a latitude, and height data of a ground object and constructing a three-dimensional ground object framework model; 2, extracting geographic grid data and image data of the ground object from a three-dimensional digital earth model; 3, generating a ground-object top-surface-texture two-dimensional image picture; and 4, carrying out texture covering on a three-dimensional ground-object model top surface. In the invention, a stereoscopic three-dimensional model can be rapidly constructed through a ground surface image in a three-dimensional scene.

Description

technical field [0001] The invention relates to a method for building a computer three-dimensional model, in particular to a method for building a ground object model in a three-dimensional scene. Background technique [0002] 3D digital city is an important means of model display in 3D scene representation, which can truly represent terrain, landforms, blocks and roads. However, the construction of a 3D city is a complex and huge process. At present, it mainly includes pre-manual fine modeling, drone oblique photography and batch modeling, and automatic modeling based on vector data. The first two methods are high in production cost and low in efficiency. Moreover, the adaptability of the software is weak. The third method has the characteristics of strong software processing capability and low production cost on the basis of ensuring the intuitive model image. [0003] The 3D digital earth model is commonly used vector data, which covers the whole world with high-resoluti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00
CPCG06T17/00
Inventor 李彭伟田振兴张小强张臻龙海英严逸
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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