Table 2.
Importance ranking of the feature points.
| Importance ranking | Position of the feature point |
| 1 | 3 |
| 2 | 14 |
| 3 | 4 |
| 4 | 1 |
| 5 | 7 |
| 6 | 15 |
| 7 | 13 |
| 8 | 11 |
| 9 | 6 |
| 10 | 9 |
| 11 | 10 |
| 12 | 2 |
| 13 | 8 |
| 14 | 5 |
| 15 | 12 |
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