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Rapid splicing and cutting method for three-dimensional model of digital city

A 3D model, digital city technology, applied in 3D modeling, image data processing, instruments, etc., can solve the problems of irregular block division, low assembly efficiency, and difficult to standardize data storage, and achieve perfect splicing and convenient data storage. Manage and ensure production quality effects

Active Publication Date: 2019-08-16
HANGZHOU DIANZI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Digital city processing enterprises in the process of producing 3D models vary from person to person, and cannot guarantee the quality of model production
In the process of merging 3D models, manually drag and drop them to the actual location according to the geographical location of each 3D model, which leads to low assembly efficiency
The division of urban blocks is divided according to the two-dimensional administrative planning map or road map of urban design. The division of each block is very irregular, and data storage is difficult to standardize

Method used

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  • Rapid splicing and cutting method for three-dimensional model of digital city
  • Rapid splicing and cutting method for three-dimensional model of digital city
  • Rapid splicing and cutting method for three-dimensional model of digital city

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Embodiment Construction

[0044] In order to illustrate the embodiments of the present invention more clearly, the specific implementation manners of the present invention will be described below with reference to the accompanying drawings.

[0045] Such as figure 1 As shown, the three-dimensional model fast mosaic method of the digital city of the embodiment of the present invention specifically comprises the following steps:

[0046] Step (1): extracting the outline of the foot of the 3D model and determining the origin of the world coordinates of the 3D model, that is, determining the outline of the foot of the 3D model and the world coordinates of the model.

[0047] In the process of large-scale scene merging, in order to accurately locate the actual position of each 3D model on the city map, the contours of the model feet are matched with the contours on the 2D map, which facilitates quick assembly. Firstly, it is necessary to calculate the footprint of each 3D model, and then calculate the posi...

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Abstract

The invention relates to a rapid splicing and cutting method for a three-dimensional model of a digital city. The method comprises the steps of extracting a footing contour line of the three-dimensional model and determining a world coordinate origin of the three-dimensional model; performing standardized operation on the three-dimensional model; carrying out contour matching based on the three-dimensional model footing contour line so as to carry out rapid model splicing; extracting cutting information of the three-dimensional model; and performing model cutting according to the cutting information of the three-dimensional model. According to the rapid splicing and cutting method for the three-dimensional model of the digital city, offset information of a single three-dimensional model inthe whole scene is obtained through a model footing contour matching method. Scripts are executed in three-dimensional modeling software, and rapid splicing of the three-dimensional model is achieved. Through standardized operation on the model, the manufacturing quality of the three-dimensional model is ensured. Through block segmentation of a large-size model, fast loading of a three-dimensional digital city can be met through block storage. According to a block storage mode, data storage management, rapid loading and dynamic updating of a large-scale scene are greatly facilitated.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional digital cities, and in particular relates to a method for quickly splicing and cutting three-dimensional models of digital cities. Background technique [0002] With the rapid development of advanced technologies such as virtual reality (VR) and 5G, GIS applications based on two-dimensional data can no longer meet the spatial data representation of urban professional applications. A more intuitive, WYSIWYG three-dimensional spatial data has become a new data expression method that customers are keen on, and it will become the core data of the digital city and even the digital earth. Based on 3D digital scenes, using VR technology can realistically simulate present and future cities, support data analysis, program demonstration and optimization, and support geographic information systems, etc. [0003] In the process of digitalizing high-definition 3D city maps, buildings are photographe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T19/20
CPCG06T17/00G06T19/20Y02A30/60
Inventor 丁建浩
Owner HANGZHOU DIANZI UNIV
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