Digital Elevation Model (DEM) is one of the important parts of the geographic information systems.This thesis mainly focuses on the algorithm of the convex hull with the discrete points, the algorithm for the Delaunay triangulation with the discrete points, the algorithm of the Constrained Delaunay triangulation,and the terrain 3D visualization,surrounding the DEM data model based
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With the rapid development of GIS (Geographic Information System) technologies and its applications, the speed for producing DEM is required to be improved continuously. This thesis focuses on the area of producing DEM (Digital Elevation Model), researchs mainly on the Algorithm of Delaunay Triangulation for the scattered points, the algorithm of extraction and disposing contours
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Radar detection performance is influenced by the atmosphere, terrain and many other factors. How to obtain the detection range of the radar quickly and accurately under battlefield environment has become one of the issues which can’t be avoided in the nowadays digitized battlefield. Considering the point of application, the thesis proposes a method for the
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Radar detection performance is influenced by the atmosphere, terrain and many other factors. How to obtain the detection range of the radar quickly and accurately under battlefield environment has become one of the issues which can’t be avoided in the nowadays digitized battlefield. Considering the point of application, the thesis proposes a method for the
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In recent years, the technology of measure system is rapidly improved, and scattered point-cloud data which contain more details of the complex shape object, can be obtained conveniently. The processing technology of 3D point-cloud data is one of key technologies in the research and application of modeling techniques. Under the most circumstance, the scattered data
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With the rapid development of network communication technology, computer technology and intelligent mobile technology, a large number of digital image information can be transmitted through the internet conveniently. In the open environment of network platform, as the important direction of information security, data hiding technology mainly solve two problems:one is to transmit data without perception
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With the rapid development of network communication technology, computer technology and intelligent mobile technology, a large number of digital image information can be transmitted through the internet conveniently. In the open environment of network platform, as the important direction of information security, data hiding technology mainly solve two problems:one is to transmit data without perception
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TIN (Triangulated Irregular Network) is a series of consecutive triangular network byusing the scattered points, the size and shape of the triangular network depends on thelocation and density of scattered points. The Delaunay Triangulation was regarded as thebest network in the TIN modeling, it can adapt to the regular and irregular distribution data,and can process
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Image fusion, which is an important and useful technique for image analysis and computer vision in recent years, is a technique to combine information from multiple images of the same scene, and the integrated image reflects information from original images, using it to analyze and judge the objects will be more accurately and perfectly.Hilbert-Huang Transform
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Digital geometry signal is nonlinear and non-stationary. Traditional signal analysis tools such as Fourier transform, Wavelet transform can’t decompose the geometry signal efficiently. Empirical mode decomposition (EMD) is a new self-adaptive method for non-stationary signal analysis. It decomposes a complex non-stationary signal into several stationary data levels and remained data level to shows the final
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