Title:
OCTREE-BASED THREE-DIMENSIONAL BUILDING LOD MODEL CONSTRUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2021/204025
Kind Code:
A1
Abstract:
The present invention provides an octree-based three-dimensional building LOD model construction method, specifically comprising the following steps: S1, reading data of a three-dimensional building model; S2, setting a tree depth parameter of an octree; S3, respectively combining outer bounding boxes of leaf nodes of the octree according to the level, and establishing coarse mesh blocks of components; S4, combining the coarse mesh blocks of the components of each level; S5, performing triangularization; S6, calculating a normal vector of each coarse mesh block; S7, combining the simplified components to form building models of the coarse mesh blocks; S8, deleting internal vertexes; S9, setting the material or texture; and S10, outputting a three-dimensional building LOD model. The octree-based three-dimensional building LOD model construction method is not limited by complexity, and has strong robustness. The generated LOD model can keep the main structural characteristic of an original building model well, has high similarity to the original building model, and can keep the structural characteristic of the original building model well even when the resolution is low.
Inventors:
LI JUN (CN)
FAN JIANYONG (CN)
ZHU BILIANG (CN)
XU ZHONGJIAN (CN)
FAN JIANYONG (CN)
ZHU BILIANG (CN)
XU ZHONGJIAN (CN)
Application Number:
PCT/CN2021/084080
Publication Date:
October 14, 2021
Filing Date:
March 30, 2021
Export Citation:
Assignee:
SPEED SPACE TIME INFORMATION TECH CO LTD (CN)
International Classes:
G06T17/00
Foreign References:
| CN111161411A | 2020-05-15 | |||
| CN108470374A | 2018-08-31 | |||
| CN109118588A | 2019-01-01 | |||
| KR101897760B1 | 2018-09-12 |
Other References:
SHAOBO JIANG ; BISHENG YANG ; XUAN SUN: "Multi-resolution representation of 3D complex building models with features preservation", 2011 19TH INTERNATIONAL CONFERENCE ON GEOINFORMATICS : SHANGHAI, CHINA, 24 - 26 JUNE 2011, IEEE, PISCATAWAY, NJ, 24 June 2011 (2011-06-24), Piscataway, NJ , pages 1 - 5, XP031924556, ISBN: 978-1-61284-849-5, DOI: 10.1109/GeoInformatics.2011.5980708
Attorney, Agent or Firm:
NANJING ZHENGLIAN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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