Premium
An appearance‐preserving simplification method for complex 3D building models
Author(s) -
She Jiangfeng,
Gu Xiaoyan,
Tan Junzhong,
Tong Ming,
Wang Chaofan
Publication year - 2019
Publication title -
transactions in gis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.721
H-Index - 63
eISSN - 1467-9671
pISSN - 1361-1682
DOI - 10.1111/tgis.12518
Subject(s) - rendering (computer graphics) , computer science , texture mapping , segmentation , classification of discontinuities , vertex (graph theory) , 3d model , artificial intelligence , projective texture mapping , texture atlas , computer vision , algorithm , image texture , theoretical computer science , mathematics , image segmentation , graph , mathematical analysis
Abstract The simplification of 3D building models to effectively reduce model complexity and improve rendering efficiency is an important component of 3D GIS. To reduce the data volume while preserving the model appearance, this article proposes a novel simplification method for complex 3D building models. Texture discontinuities are addressed by developing a new data model that records the mapping relation between the texture coordinates of each vertex and its neighboring triangles. The surface mesh of the building model is then segmented into regions, guided by topology and appearance. Finally, the mesh segmentation information is used to derive an improved error metric that considers both geometric and texture errors, and the texture coordinates are adjusted after each simplification operation. A series of comparative experiments alongside traditional methods demonstrates that our approach achieves a good balance between geometric fidelity and texture preservation, and produces simplified 3D building models with better visual quality.