Rapid three-dimensional urban model production using bilayered displacement mapping

Title
Rapid three-dimensional urban model production using bilayered displacement mapping
Authors
유병현
Keywords
urban modeling; image-based modeling; hybrid urban model; displacement mapping
Issue Date
2013-01
Publisher
International journal of geographical information science : IJGIS
Citation
VOL 27, NO 1, 24-46
Abstract
The depiction and navigation of large-scale urban landscapes are limited by the great cost of traditional computer-aided design (CAD) models for large urban environment in terms of both the labor of data entry and the runtime computational expense. This article presents a hybrid modeling approach that enables rapid urban model production from legacy spatial data. Our scheme fills the gap between the low geometry models, such as photo-textured digital terrains, and high geometry models, such as true three-dimensional CAD models. To achieve optimal performance in modeling and rendering, we employ bilayered displacement mapping consisting of global displacement mapping (GDM) for terrains and local displacement mapping (LDM) for buildings. The LDM is performed only within image processing so that the complexity of the models depends only on the area of an urban model.We present a use case of rapid urban model production to compare our approach with the traditional polygonal urban models of a widely used geo-browser.
URI
http://pubs.kist.re.kr/handle/201004/46189
ISSN
13658816
Appears in Collections:
KIST Publication > Article
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