Title | ||
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Parallel Algorithms Based on the Temporal-Window Method for Non-Alternating 3D-WT over Angiographies Using a Multicomputer |
Abstract | ||
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In this paper, we introduce and evaluate the parallel implementations of two video sequences decorrelation algorithms having been developed based on the non-alternating three-dimensional wavelet transform (3D-WT) and the temporal-window method. The proposed algorithms have been proven to outperform the classic 3D-WT algorithm in terms of a better coding efficiency and lower computational requirements while enabling a lossless coding and a top-quality reconstruction: the two most highly relevant features to medical imaging applications. The parallel implementations of the algorithms are developed and tested on a shared memory system, a SGI Origin 3800 supercomputer, making use of a message-passing paradigm. We evaluate and analyze the performance of the implementations in terms of the response time and speed-up factor by varying the number of processors and various video coding parameters. The key point enabling the development of highly efficient implementations rely on a workload distribution strategy supplemented by the use of parallel I/O primitives, for better exploiting the inherent features of the application and computing platform. Two sets of I/O primitives are tested and evaluated: the ones provided by the C compiler and the ones belonging to the MPI/IO library. |
Year | DOI | Venue |
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2009 | 10.1007/s11265-008-0188-4 | Signal Processing Systems |
Keywords | DocType | Volume |
Parallel algorithms,Parallel I/O,Multicomputer,Non-alternating wavelet transform,Temporal-window method,Angiography sequences | Journal | 55 |
Issue | ISSN | Citations |
1-3 | 1939-8018 | 1 |
PageRank | References | Authors |
0.34 | 16 | 3 |
Name | Order | Citations | PageRank |
---|---|---|---|
E. Moyano-Ávila | 1 | 4 | 1.07 |
L. Orozco-Barbosa | 2 | 172 | 19.75 |
F. J. Quiles | 3 | 33 | 4.97 |