Research Article
Detection of Pine Cones in Natural Environment Using Improved YOLOv4 Deep Learning Algorithm
Table 1
Structure of the original backbone network and the improved backbone network.
| Module | Number of layers | Number of filters | Output channels | Original | Improved | Original | Improved |
| 1 | Residual∗1 | Residual∗1 | 1 × 1 Conv∗32 | 1 × 1 Conv∗32 | 64 | 3 × 3 Conv∗64 | 3 × 3 Conv∗64 |
| 2 | Residual∗2 | Residual∗2 | 1 × 1 Conv∗64 | 1 × 1 Conv∗64 | 64 | 3 × 3 Conv∗64 | 3 × 3 Conv∗64 |
| 3 | Residual∗8 | Dense∗4 | 1 × 1 Conv∗128 | 1 × 1 Conv∗64 | 128 | 3 × 3 Conv∗128 | 3 × 3 Conv∗32 |
| 4 | Residual∗8 | Dense∗4 | 1 × 1 Conv∗256 | 1 × 1 Conv∗128 | 256 | 3 × 3 Conv∗256 | 3 × 3 Conv∗64 |
| 5 | Residual∗4 | Dense∗4 | 1 × 1 Conv∗512 | 1 × 1 Conv∗256 | 512 | 3 × 3 Conv∗512 | 3 × 3 Conv∗128 |
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