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Three-dimensional model sub-bounding box construction method and device based on GIS

A technology of three-dimensional model and construction method, which is applied in 3D modeling, character and pattern recognition, image data processing, etc., can solve the problems of low spatial analysis accuracy and low compactness of sub-bounding boxes, achieve compact structure, improve calculation The effect of efficiency and accuracy

Inactive Publication Date: 2021-10-12
GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI +1
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Problems solved by technology

However, in the prior art, the sub-bounding box is usually constructed only according to the category of the triangular patch, the compactness of the constructed sub-bounding box is low, and the accuracy and accuracy of spatial analysis using the sub-bounding box are low.

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  • Three-dimensional model sub-bounding box construction method and device based on GIS
  • Three-dimensional model sub-bounding box construction method and device based on GIS
  • Three-dimensional model sub-bounding box construction method and device based on GIS

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Embodiment Construction

[0031] In order to make the purpose, technical solution and advantages of the present application clearer, the embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0032] It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the embodiments of the present application.

[0033] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms "a", "said" and "the" used in the embodiments of this application and the appended claims are also intended to include ...

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Abstract

The invention relates to a three-dimensional model sub-bounding box construction method and device based on a GIS, and the method comprises the steps: obtaining the position information of each vertex of a triangular patch of a three-dimensional model on the GIS, and carrying out the more precise classification of the triangular patch in combination with the type and spatial relation of the triangular patch, clustering a plurality of classification sets on the basis of a triangular patch growth algorithm to obtain a more compact clustering set, and then constructing the sub-bounding box of the three-dimensional model with a compact structure on the basis of the clustering set and displaying in the GIS. Compared with the prior art, the sub-bounding box constructed in the application is more compact in structure, and when the sub-bounding box is applied to intersection calculation or spatial analysis, the calculation efficiency and accuracy can be effectively improved.

Description

technical field [0001] The invention relates to the field of three-dimensional model construction, in particular to a method and device for constructing a sub-bounding box of a three-dimensional model based on a GIS system. Background technique [0002] 3D reconstruction refers to the use of 3D laser scanning technology, synthetic aperture radar and digital panoramic camera and other spatial data acquisition technologies to collect point cloud data in the research area, and use the triangulation network generation algorithm to perform 3D modeling on the ground, urban roads and buildings on the 3D GIS platform , to get the 3D model of the research area, so as to facilitate the spatial analysis and research on the 3D GIS platform. [0003] When performing spatial analysis on a 3D model, in order to reduce the amount of computational data for 3D model analysis, the efficiency of spatial analysis is usually improved by segmenting the 3D model and constructing sub-bounding boxes....

Claims

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Application Information

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IPC IPC(8): G06T17/00G06K9/62
CPCG06T17/00G06F18/23
Inventor 丁小辉杨骥黄吴蒙李勇刘凌佳黄浩玲
Owner GUANGZHOU INST OF GEOGRAPHY GUANGDONG ACAD OF SCI
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