Visualization method and device for photogrammetry model in unreal engine, and equipment

A photogrammetry and Unreal Engine technology, applied in the field of digital twins, can solve the problems of rendering delay, excessive CPU calculation and memory usage, and achieve the effect of reducing time-consuming

Active Publication Date: 2021-11-09
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

However, when the user quickly changes the view area in real-time rendering, the existing methods still require excessive CPU calculation and memory usage, resulting in rendering delays

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  • Visualization method and device for photogrammetry model in unreal engine, and equipment
  • Visualization method and device for photogrammetry model in unreal engine, and equipment
  • Visualization method and device for photogrammetry model in unreal engine, and equipment

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Embodiment Construction

[0057] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0058] The visualization method of the photogrammetry model in Unreal Engine provided by this application can be applied in the following application environments. Among them, the terminal executes a visualization method of the photogrammetry model in the Unreal Engine, by obtaining the OSGB data of the photogrammetry model, converting it into Uasset format data in the Unreal Engine, reconstructing the virtual quadtree, and then reconstructing the quadtree in the reconstructed quadtree In the current frame, the layered loading of tiles is realized, and the tile tree in th...

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Abstract

The invention relates to a visualization method and device for a photogrammetry model in an unreal engine, and computer equipment. The method comprises the following steps: acquiring OSGB data of a photogrammetry model, converting the OSGB data into Uasset format data in an unreal engine, reconstructing a virtual quadtree, and then performing binary coding on nodes in the reconstructed quadtree; in a current frame, realizing tile hierarchical loading, cutting through a view cone, screening tile hierarchies for a tile tree in a view field range through a threshold value, judging a set membership between a current node and a node requested to be loaded in a previous frame through binary coding, and loading the current node; and asynchronously loading or unloading the request data nodes having the father-son-child-father relationship with the current node in the request data node set according to a preset rule. Visualization of the photogrammetry model is achieved in the unreal engine, the real-time visualization fluency of the oblique photography model can be improved, and memory use is reduced.

Description

technical field [0001] This application relates to the technical field of digital twins, in particular to a visualization method, device, computer equipment and storage medium of a photogrammetry model in Unreal Engine. Background technique [0002] The digital twin city is a complex technology and application system for new smart cities (Gu Jianxiang et al., n.d.). In the context of smart cities, digital twins can establish a visualized high-fidelity 3D scene for a region to support testing and decision-making ( et al., 2018), therefore, it is first necessary to construct a unified spatial "data base" with location information, and present the real geographic coordinates of the city in the virtual environment (Mao, 2014). [0003] The oblique photogrammetry model is an indispensable data base for realizing the digital twin city. Due to the large amount of data, which cannot be visualized using one-time rendering, GIS researchers have proposed many methods to load these u...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/00G06T17/00G06T19/20
CPCG06T15/005G06T17/005G06T19/20
Inventor 贾庆仁霍煜昊杨岸然李军熊伟吴烨马梦宇彭双欧阳雪杜春钟志农陈荦陈浩伍江江景宁吴秋云
Owner NAT UNIV OF DEFENSE TECH
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