Título: | A PREDICTIVE CACHE SYSTEM FOR REAL-TIME PROCESSING OF LARGE 2D GRAPHICAL DADA | |||||||
Autor: |
SERGIO ESTEVAO MACHADO LISBOA PINHEIRO |
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Colaborador(es): |
LUIZ CARLOS PACHECO RODRIGUES VELHO - Orientador WALDEMAR CELES FILHO - Coorientador |
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Catalogação: | 31/MAR/2004 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | |||||
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=4734&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=4734&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.4734 | |||||||
Resumo: | ||||||||
Nowadays, many areas of computer graphics need to process a
huge amount of data. In order to visualize the data in
realtime time, it is necessary to solve two different
problems. The first problem is the limited time available to
perform rendering. The second one arises from the
restricted capacity of storage high-speed memories, like
RAM and texture memories. In order to solve the first
problem, this work has used multi-resolution techniques.
The multi-resolution representation allows the application
to work with a constant amount of data during the rendering
process. The second problem has been solved by a predictive
management memory system based on the virtual memory model.
This work proposes an architecture that allows any
storage device to be incorporated in the system. Devices
are organized sequentially. The heart of the system
consists in allocating an area of memory for each device
and managing this space optimally. The predictive
system aims to load in advance. The data that will probably
be used by the application in the near future. This work
proposes a specific adaptative prediction algorithm for the
visualization problem. This algorithm exploits
the information about the camera parameter variations as
well as the data transfer rate, in order to decide what
should be loaded. The camera parameters are used to
determine which data will possibly be used by the
application. The transfer rate is used to decide which
resolution level of the data should be loaded to the high-
speed devices, in advance. The predictive
memory management system has been tested for real-time
visualization of satellite images and virtual panoramas.
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