Title:
METHOD FOR CONSTRUCTING MULTI-LEVEL OF DETAIL MODEL OF OBJECT, AND COMPUTER DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/238359
Kind Code:
A1
Abstract:
A method for constructing a multi-level of detail (LOD) model of an object, and a computer device, applicable in the construction of a high-precision map. The method comprises: nesting a digital surface model (DSM) corresponding to a satellite image and outline vectors of buildings in the satellite image; then performing sampling on the basis of the nested DSM and outline vectors of the buildings to obtain discrete 3D point clouds of the buildings; and constructing the buildings using the 3D point clouds, wherein the 3D point clouds are obtained by performing sampling on the basis of the outlines of the buildings, and thus can highly precisely restore top surface information of the buildings, such that a high-precision multi-LOD model can be obtained. The method does not require individual one-by-one acquisition of height information of each building, can directly use an automatic construction process to reduce workload and a manufacturing period, thus effectively reducing production costs of an LOD model; in addition, the method ensures the precision of a complicated building model, and implements quick production of a low-cost city-scale high-precision map.
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Inventors:
LIU ZIJIAN (CN)
ZHANG YANFENG (CN)
KANG YIFEI (CN)
ZHANG YANFENG (CN)
KANG YIFEI (CN)
Application Number:
PCT/CN2021/081695
Publication Date:
December 02, 2021
Filing Date:
March 19, 2021
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
G06K9/00
Foreign References:
| CN104457691A | 2015-03-25 | |||
| CN102074050A | 2011-05-25 | |||
| CN101604018A | 2009-12-16 |
Other References:
KONG JIANHONG, YANG CHAO;YU XIAO-HUI;QI GUANG-YUAN;WANG ZE-KUN: "3D Point Cloud Adaptive Levels of Detail Model Dynamic Rendering Based on Viewpoint", SCIENCE TECHNOLOGY AND ENGINEERING, ZHONGGUO JISHU JINGJI YANJIUHUI, CN, vol. 19, no. 12, 30 April 2019 (2019-04-30), CN , pages 231 - 236, XP055872780, ISSN: 1671-1815
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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