Table 3.
The setting of FPN.
| Pyramid level | Stride | Size |
| 3 | 8 | 32 |
| 4 | 16 | 64 |
| 5 | 32 | 128 |
| 6 | 64 | 256 |
| 7 | 128 | 512 |
FPN = feature pyramid network.
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