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| Paper: |
Parallelism for HST Image Restoration -- Some Experiences and Options |
| Volume: |
25, Astronomical Data Analysis Software and Systems I |
| Page: |
215 |
| Authors: |
Adorf, H.-M.; Oldfield, M. J. |
| Abstract: |
We report on recent experience gained in a project set up to explore the power of parallel computing for the restoration of Hubble Space Telescope images. Using our vector-processor implementation of the standard SIPSF Richardson-Lucy algorithm, we achieve a full 40-iteration restoration of a 512x512 image frame in less than 90 seconds. With this considerable computing power we carry out Monte Carlo simulations which allow the quantification of the probable statistical errors in a restoration. We compare the relative merits of our approach, which utilizes fine-grained parallelism, with several alternatives including a low-cost one transforming a workstation cluster into a coarse-grained ``virtual supercomputer''. |
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