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Table 7
Reconstruction of the star cluster with three 512 × 512 equispaced images.
| tol = 1e-3 | ||||
| Algorithm | It | Err | Sec | SpUp |
|
|
||||
| RL | 319 | 2.39e-4 | 393.4 | – |
| RL_CUDA | 319 | 2.38e-4 | 4.641 | 84.8 |
| OSEM | 151 | 1.63e-4 | 220.8 | – |
| OSEM_CUDA | 151 | 1.62e-4 | 2.421 | 91.2 |
| SGP | 71 | 1.35e-3 | 97.80 | – |
| SGP_CUDA | 71 | 1.29e-3 | 1.641 | 59.6 |
|
|
||||
| tol = 1e-5 | ||||
| Algorithm | It | Err | Sec | SpUp |
|
|
||||
| RL | 1385 | 6.65e-5 | 1703 | – |
| RL_CUDA | 1385 | 6.64e-5 | 19.38 | 87.9 |
| OSEM | 675 | 5.64e-5 | 980.6 | – |
| OSEM_CUDA | 675 | 5.64e-5 | 10.75 | 91.2 |
| SGP | 337 | 5.89e-4 | 455.2 | – |
| SGP_CUDA | 337 | 1.79e-4 | 7.187 | 63.3 |
|
|
||||
| tol = 1e-7 | ||||
| Algorithm | It | Err | Sec | SpUp |
|
|
||||
| RL | 7472 | 5.64e-5 | 9180 | – |
| RL_CUDA | 7472 | 5.98e-5 | 104.8 | 87.6 |
| OSEM | 3750 | 6.13e-5 | 5442 | – |
| OSEM_CUDA | 3750 | 5.98e-5 | 59.52 | 91.4 |
| SGP | 572 | 7.37e-5 | 772.6 | – |
| SGP_CUDA | 572 | 7.05e-5 | 12.20 | 63.3 |
Notes. The error is the average relative error in the magnitudes defined in Eq. (27).
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