Título: | MULTIRESOLUTION ADAPTIVE MESH EXTRACTION FROM VOLUMES, USING SIMPLIFICATION AND REFINEMENT | |||||||
Autor: |
ADELAILSON PEIXOTO DA SILVA |
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Colaborador(es): |
MARCELO GATTASS - Orientador LUIZ CARLOS PACHECO RODRIGUES VELHO - Coorientador |
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Catalogação: | 13/JUN/2003 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: |
THESIS
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Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3636&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=3636&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.3636 | |||||||
Resumo: | ||||||||
This work presents a method for extracting multiresolution
adaptive polygonal meshes, from volumetric objects. Main
aplications of this work are related to medical area, fluid
dynamics, geosciences, metheorology and others. In these
areas data may be represented as volumetric objects.
Volumetric datasets are implicit representations of
objects, so it s very dificult to apply directly any
process to these objects. Mesh extraction obtains an
explicit representation of the objetc, such that it s
easier to process directly the objects.
The presented method extracts the mesh from two main
processes: Simplification and Refinement. The
simplification step extracts a supersampled representation
of the object (in the same volume resolution), and
simplifies it in such a way to obtain a base mesh (or
coarse mesh), in a low resolution, but containing the
correct topology of the object. Refinement step uses the
distance transform to obtain a multiresolution
representation of the mesh, it means that at each instant
it s obtained an adaptive higher resolution mesh. The final
mesh presents a set of important properties, like good
triangle aspect ratio, convergency to the object surface,
may be applied as to objects with boundary and as to
objects with multiple connected components, among others
properties.
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