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Three-dimensional model lightweight method and device

A 3D model, lightweight technology, applied in the field of image processing, can solve the problems of large data transmission time and 3D model freezing, and achieve the effect of improving the quality of simplification and the efficiency of simplification

Pending Publication Date: 2022-05-13
GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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Problems solved by technology

In addition, because the data of the 3D model is large and the transmission time is long, the display of the 3D model in the visual interface is stuck, so the 3D model needs to be lightweighted

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] It should be understood that the step numbers used herein are only for convenience of description, and are not intended to limit the order in which the steps are executed.

[0044] It should be understood that the terminology used in the description of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in this specification and the appended claims, the singular forms ...

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Abstract

The invention discloses a three-dimensional model lightweight method and device, and relates to the technical field of image processing. The method comprises the following steps: reconstructing a three-dimensional model according to tile data of the three-dimensional model to obtain a topological continuous triangular grid model; performing surface segmentation according to plane features of the triangular grid model to obtain block flat surface domains after segmentation of the overall three-dimensional model; carrying out plane difference degree calculation on adjacent segmentation planes according to the block flat surface domains to obtain merged blocks; according to the boundary lines of the combined blocks, geometric feature points in boundary line nodes are screened, and a space face formed by the geometric feature points serves as a lightweight block face of the three-dimensional model; and generating a new texture by adopting a space orthographic projection method according to a space region range covered by the lightweight block surface to obtain a lightweight three-dimensional model. According to the method, the simplification efficiency and the simplification quality of the three-dimensional model can be improved, and optimized storage and efficient loading of the three-dimensional model are realized.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for lightweighting a three-dimensional model. Background technique [0002] With the development of network technology and computer technology, 3D visualization technology has also been developed rapidly and has a wide range of applications. For example, urban 3D models are an important part of urban digital infrastructure, including urban planning, environmental monitoring, and spatial information analysis. With the continuous development of digital cities and new surveying and mapping technologies, the accuracy of 3D models obtained is getting higher and higher. The display of these 3D models requires higher hardware performance such as computing performance, physical storage space, memory space, and GPU rendering capabilities. For a long time, it can only be carried out by personal computers with better hardware conditions. In addition, because t...

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Application Information

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IPC IPC(8): G06T17/20G06T19/20
CPCG06T17/20G06T19/20
Inventor 刘洋柳翠明夏小科李奇陈可蕴赵东旭韩珊珊赵林峰
Owner GUANGZHOU URBAN PLANNING & DESIGN SURVEY RES INST
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