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