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Fig.1
Image with pixel value from 0 to 4
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| 3 | 4 | 4 | 5 | 5 |
| 3 | 3 | 4 | 4 | 5 |
| 2 | 3 | 3 | 4 | 4 |
| 2 | 2 | 3 | 3 | 4 |
| 1 | 2 | 2 | 3 | 3 |
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Fig.2 Pixel value of Fig.1
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Fig.3
Translation of Fig.1 by 1 pixel
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| 3 | 3 | 4 | 4 | 5 |
| 2 | 3 | 3 | 4 | 4 |
| 2 | 2 | 3 | 3 | 4 |
| 1 | 2 | 2 | 3 | 3 |
| 1 | 1 | 2 | 2 | 3 |
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Fig.4 Pixel value of Fig.3
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| 3,3 | 4,3 | 4,4 | 5,4 | 5,5 |
| 3,2 | 3,3 | 4,3 | 4,4 | 5,4 |
| 2,2 | 3,2 | 3,3 | 4,3 | 4,4 |
| 2,1 | 2,2 | 3,2 | 3,3 | 4,3 |
| 1,1 | 2,1 | 2,2 | 3,2 | 3,3 |
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Fig.5 Joint outcomes of 1-pixel misalignment
(from Fig.2 and Fig.4)
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| 3,3 | 4,4 | 4,4 | 5,5 | 5,5 |
| 3,3 | 3,3 | 4,4 | 4,4 | 5,5 |
| 2,2 | 3,3 | 3,3 | 4,4 | 4,4 |
| 2,2 | 2,2 | 3,3 | 3,3 | 4,4 |
| 1,1 | 2,2 | 2,2 | 3,3 | 3,3 |
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Fig.6 Joint outcomes of exact alignment
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Fig.7
Joint histogram of Fig.5 (1-pixel misalignment)
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Fig.8
Joint histogram of Fig.6 (exact alignment)
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Fig.9
Joint entropy as a function of a misalignment
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Fig.10
Pelvic CT image center-aligned
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Fig.11
Pelvic CT image misaligned by -60 pixels
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Fig.12
Pelvic CT image misaligned by +60 pixels
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