This paper studies the effect of airborne elevation information on the classification of an aerial image in an urban area. In an urban area, it is difficult to classify buildings relying solely on the spectral information obtained from aerial images because urban buildings possess a variety of roof colors. Therefore, combining Lidar data with aerial images overcomes the difficulties encountered...

Urban scenes acquisition is very often performed using laser scanners onboard a vehicle. In parallel, color information is also acquired through a set of coarsely aligned camera pictures. The question of combining both measures naturally arises for adding color to the 3D points or enhancing the geometry, but it faces important challenges. Indeed, 3D geometry acquisition is highly accurate while...

Image-Based Capture and Rendering with Applications to Urban Planning

A method to calculate geometrical input parameters for urban dispersion models is presented. Two cases are considered according to the relative size of the pollutant plume compared to the building size. Applying image processing techniques to urban Digital Elevation Models (DEMs, 3-D urban databases), simple geometrical parameters over extensive urban areas are calculated. Some preliminary resu...

Urban environmental quality (UEQ) is a complex and spatially variable parameter of increasing concern, especially in densely populated cities of the tropics and subtropics where climate, air quality, and the urban infrastructure may interact to produce uncomfortable and hazardous effects. The study investigates the application of multispectral remote sensing from the Landsat ETM‡ and IKONOS sat...

Predictive simulation tools are needed for aircraft structures sizing, to enhance safety, reliability and performance. But the main difficulty arises from the lack of accurate knowledge regarding their input parameters, particularly thermal properties of composite materials. A lot of techniques [1] already exist to characterise orthotropic composite materials but they have to be associated or r...

We present a new bilateral agent-based land market model, which moves beyond previous work by explicitly modeling behavioral drivers of land-market transactions on both the buyer and seller sides; formation of bid prices (of buyers) and ask prices (of sellers); and the relative division of the gains from trade from the market transactions. We analyze model output using a series of macro-scale e...

Previous work on Korean language processing has proposed different basic segmentation units. This paper explores different possible dependency representations for Korean using different levels of segmentation granularity — that is, different schemes for morphological segmentation of tokens into syntactic words. We provide a new Universal Dependencies (UD)-like corpus based on different levels o...

New techniques to measure 2-D and 3-D visibility over urban spaces are presented in this paper. The concept of ‘isovist’, i.e. the visible space from a vantage point, could help in providing a quantifiable basis for Kevin Lynch's urban analysis, as outlined in his book The Image of the City. We also expand on the concept of 3-D isovists and develop a new technique to calculate them on Digital E...