The advance of image processing makes knowledge-based automatic image interpretation much more realistic than ever.
In the domain of remote sensing image processing, the introduction of knowledge enhances the confidence of
recognition of typical ground objects. There are mainly two approaches to employ knowledge: the first one is scattering
knowledge in concrete program and relevant knowledge of ground objects are fixed by programming; the second is
systematically storing knowledge in knowledge base to offer a unified instruction for each object recognition procedure.
In this paper, a knowledge-based framework for ground objects recognition in remote sensing image is proposed. This
framework takes the second means for using knowledge with a hierarchical architecture. The recognition of typical
airport demonstrated the feasibility of the proposed framework.
KEYWORDS: 3D displays, Geographic information systems, Visualization, Databases, 3D image processing, Data modeling, 3D modeling, OpenGL, Optical spheres, Instrument modeling
Nowadays many Geographic Information System (GIS) have been widely used in many municipal corporations. Water-supplying
corporations in many cities developed GIS application system based on SiCAD/Open GIS platform several
years ago for their daily management and engineering construction. With the increasing of commercial business, many
corporations now need to add the functionality of three dimensional to display to their GIS System without too much
financial cost. Because of the expensiveness of updating SiCAD/Open GIS system to the up-to-date version, the
introduction of a third-part 3D display technology is considered. In our solution, Visualization Toolkit (VTK) is used to
achieve three dimensional display of underground water-supplying network on the basis of an existing SiCAD/Open GIS
system. This paper addresses on the system architecture and key implementation technologies of this solution.
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