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Results 1 - 10
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2,594
Variable Resolution Terrain Surfaces
, 1996
"... A model for the multiresolution decomposition of planar domains into triangles is introduced, which is more general than other multiresolution models proposed in the literature, and can be efficiently applied to the representation of a polyhedral terrain at variable resolution. The model is based on ..."
Abstract
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Cited by 53 (6 self)
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A model for the multiresolution decomposition of planar domains into triangles is introduced, which is more general than other multiresolution models proposed in the literature, and can be efficiently applied to the representation of a polyhedral terrain at variable resolution. The model is based
Representation and Visualization of Terrain Surfaces at Variable Resolution
, 1997
"... We present a new approach for managing the multiresolution representation of discrete topographic surfaces. A Triangulated Irregular Network (TIN) representing the surface is built from sampled data by iteratively refining an initial triangulation that covers the whole domain. The refinement process ..."
Abstract
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Cited by 76 (11 self)
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very popular. Major applications involve generic surfaces embedded in 3D space 16;8;27 , terrains i...
ESTIMATION OF THE TERRAIN SURFACE AZIMUTHAL / RANGE SLOPES
"... Abstract: The estimation of geophysical parameters, as surface roughness, soil moisture... is often affected by the terrain elevation. To correct the polarimetric effects caused by terrain having significant relief, it is necessary to introduce a remote sensing technique which is directly capable o ..."
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Abstract: The estimation of geophysical parameters, as surface roughness, soil moisture... is often affected by the terrain elevation. To correct the polarimetric effects caused by terrain having significant relief, it is necessary to introduce a remote sensing technique which is directly capable
Triangulation-based L 1 -fitting of Terrain Surfaces
"... . Given a planar triangulation, the goal is to select elevations at its vertices so that resulting piecewise-linear triangulated surface approximates specified elevations using the L 1 -norm as the primary measure-of-fit. Several suboptimal algorithms relating to that problem have been devised and i ..."
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-approximation, L 2 -approximation, linear programming, median filter, terrain surface modeling, TIN, triang...
REPRESENTATION OF GEOGRAPHIC TERRAIN SURFACE USING GLOBAL INDEXING
"... A global 3D geographic model and a feasible solution for its visualization and management remains a challenging vision. The existence of a reusable platform would provide an unprecedented potential for development of applications related to geography and facilitate comprehension of geographic data. ..."
Abstract
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Cited by 4 (1 self)
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systems in the domain. Handling entire terrain is inherently coupled with global spatial index. This problem is overviewed and a solution is proposed. Afterwards the data representation of the essential surface in geography is introduced. The representation deals
Real-Time Terrain Surface Extraction at Variable Resolution
, 1997
"... . Multiresolution terrain models allow the extraction of the surface at different levels of details. Real terrain data is large enough to prevent from real-time walk-through at a reasonable level of detail. Moreover, a coarse view of a terrain may not attend some application requirements. Therefor ..."
Abstract
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Cited by 1 (0 self)
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. Multiresolution terrain models allow the extraction of the surface at different levels of details. Real terrain data is large enough to prevent from real-time walk-through at a reasonable level of detail. Moreover, a coarse view of a terrain may not attend some application requirements
Effective Techniques for Interactive Rendering of Global Terrain Surfaces
"... Abstract—Global terrain visual systems must support real-time visualization and manipulation of huge multiresolution geograph-ical datasets. In this letter, we focus on certain key techniques, such as construction of three-dimensional (3-D) ellipsoidal models, spa-tial indexing mechanisms, interacti ..."
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, interactive terrain datasets simplifica-tion by the M-band wavelets and triangulation techniques, and sur-face browsing from different view directions. Finally, an experi-ment is carried out using different levels of detail data; our results suggest that the methods are effective in enhancing performance of a
TECHNIQUES FOR USING 3D TERRAIN SURFACE MEASUREMENTS FOR VEHICULAR SIMULATIONS
, 2009
"... Throughout a ground vehicle development program, it is necessary to possess the loads the vehicle will experience. Unfortunately, actual loads are only available at the conclusion of the program, when the vehicle has been built and design changes are costly. The design engineer is challenged with us ..."
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depends on the fidelity of the vehicle models and their excitation. The focus of this thesis is the development of techniques for using 3D terrain surface measurements for vehicular simulations. Contributions are made to vehicle model parameter identification, terrain filtering, and application
View-Dependent Refinement of Progressive Meshes
"... Level-of-detail (LOD) representations are an important tool for realtime rendering of complex geometric environments. The previously introduced progressive mesh representation defines for an arbitrary triangle mesh a sequence of approximating meshes optimized for view-independent LOD. In this paper, ..."
Abstract
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Cited by 459 (5 self)
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, smooth visual transitions (geomorphs) can be constructed between any two selectively refined meshes. A number of previous schemes create view-dependent LOD meshes for height fields (e.g. terrains) and parametric surfaces (e.g. NURBS). Our framework also performs well for these special cases. Notably
Self-Supervised Learning to Visually Detect Terrain Surfaces for Autonomous Robots Operating in Forested Terrain
- Journal of Field Robotics
, 2012
"... Autonomous robotic navigation in forested environments is difficult because of the highly variable appearance and geometric properties of the terrain. In most navigation systems, researchers assume a priori knowledge of the terrain appearance properties, geometric properties, or both. In forest envi ..."
Abstract
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Cited by 1 (0 self)
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environments, vegetation such as trees, shrubs, and bushes has appearance and geometric properties that vary with change of seasons, veg-etation age, and vegetation species. In addition, in forested environments the terrain surface is often rough, sloped, and/or covered with a surface layer of grass
Results 1 - 10
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2,594
