A simplification method of 3D architectural model keeping structure and texture features

An architectural model and texture feature technology, applied in image data processing, instruments, etc., can solve problems such as difficulty in multi-level of detail models, inability to maintain models with multi-level of detail and texture features, etc., to achieve the effect of meeting application requirements.

Active Publication Date: 2021-12-10
CHINESE ACAD OF SURVEYING & MAPPING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method mainly focuses on data transmission and scheduling, cannot maintain the multi-level of detail and texture features of the model, and it is difficult to generate a multi-level of detail model

Method used

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  • A simplification method of 3D architectural model keeping structure and texture features
  • A simplification method of 3D architectural model keeping structure and texture features
  • A simplification method of 3D architectural model keeping structure and texture features

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Embodiment 1

[0052] In the embodiment of the present invention, such as figure 1 As shown in , a simplification method of 3D architectural model that maintains boundary and texture features mainly includes the following steps:

[0053] Step 1: Model Preprocessing

[0054] Parsing 3D architectural model data in different source formats, constructing surface model index and model triangulation list according to the index and vertex information of the original model, requiring the spatial coordinates of each vertex to be unique.

[0055] The surface model index mainly records the adjacent information of the triangulation on the surface of the model. The adjacent edge of each vertex, the adjacent triangulation of each edge and the vertex position of each triangulation can be obtained through the adjacent information.

[0056] The surface model triangulation list mainly records the space coordinates, texture coordinates and texture information of the vertices corresponding to each triangulatio...

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Abstract

The invention discloses a three-dimensional building model simplification method that maintains structure and texture features, analyzes three-dimensional building model data in different source formats, constructs a surface model index and a surface model triangulation list; calculates each The quadratic error of each vertex, so as to calculate the quadratic error of each edge; normal line and area verification, calculate the adjacent triangulation and the surface model triangulation list after simplification, and use the RTT method to calculate the space coordinates of the new vertex and texture coordinates, and update the corresponding texture information in the surface model triangulation list, as well as new vertices and texture coordinates; repeat the cycle to simplify to the specified number of triangulations; output the texture of each triangulation to complete the 3D building model Simplification. The invention can automatically generate low-precision models with different levels of detail from a high-precision three-dimensional model to meet various application requirements of a smart city.

Description

technical field [0001] The invention relates to the fields of geographic information system, virtual reality and computer graphics, in particular to a three-dimensional building model simplification method maintaining structure and texture features. Background technique [0002] 3D models are an important part of digital and smart cities, mainly including 3D models of roads, urban components, vegetation and houses, which are widely used in urban planning, cadastral management and communication planning and other fields. With the development of Lidar and oblique photography technology, it is possible to automatically build large-scale 3D models. The Microsoft Global Mapping Project has produced 3D models of 360 cities around the world. With the construction of digital and smart cities in China, many cities have produced a large number of 3D models of various precision. However, these models use different software and storage formats. How to effectively reuse and manage thes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T19/20
CPCG06T19/20
Inventor 李成名刘坡吴昊于大河刘振东王飞金志国刘勇方弛宇张成成
Owner CHINESE ACAD OF SURVEYING & MAPPING
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