RT Dissertation/Thesis
T1 Representation techniques for real-time visualization of hybrid terrain models
A1 González Paredes, Enrique
K1 hybrid terrain model
K1 multiresolution rendering
K1 terrain rendering
K1 interactive visualization
K1 polygon triangulation
AB In this thesis several techniques to generate and visualize 3D hybrid terrain models are proposedwhich can integrate geographic data from heterogeneous sources, combining the benefts of coarsegrainedgrid-data and fne-grained irregular data without requiring a remeshing process that wouldmodify the original datasets. Multiresolution rendering of the obtained representations are supportedin the large regular areas, and in some cases in the whole hybrid model. All these methods are basedin a local tessellation approach which can selectively rebuild the adaptive tessellation between theregular and irregular meshes of the models during the interactive visualization process. Thisapproach was originally developed in the Hybrid Meshing algorithm developed by some membersof the research group. An exhaustive analysis of this algorithm is presented and different extensionsand improvements are proposed to avoid the preprocessing phase and to leverage the parallelism ofmodern GPUs. Two new methods are also proposed: the EHM and the EDP proposals. The EHMalgorithm supports multiresolution rendering of the whole hybrid model, both in the base regulargrid as well as in the high resolution irregular meshes. The EDP algorithm proposes the use of theexternal edges of the irregular meshes as the fundamental primitive to tessellate the boundaries ofboth types of meshes, simplifying the preprocessing phase and minimizing the insertion of verticesin the irregular mesh.
YR 2014
FD 2014-03-19
LK http://hdl.handle.net/10347/10008
UL http://hdl.handle.net/10347/10008
LA eng
DS Minerva
RD 4 may 2026