backbone:
[from, number, module, args]
Two Stream
[
######### TransformerBlock One #############
# stream one
[-1, 1, Focus, [64, 3]], # 0-P1/2
[-1, 1, Conv, [128, 3, 2]], # 1-P2/4
[-1, 3, C3, [128]], # 2-P2/4
[-1, 1, Conv, [256, 3, 2]], # 3-P3/8
[-1, 9, C3, [256]], # 4-P3/8
# stream two
[-4, 1, Focus, [64, 3]], # 5-P1/2
[-1, 1, Conv, [128, 3, 2]], # 6-P2/4
[-1, 3, C3, [128]], # 7-P2/4
[-1, 1, Conv, [256, 3, 2]], # 8-P3/8
[-1, 9, C3, [256]], # 9
请问这里第二流的输入为什么是-4，是因为在前向传播过程中使用的是-4作为条件所以无所谓吗
backbone:
[from, number, module, args]
Two Stream
[
######### TransformerBlock One #############
# stream one
[-1, 1, Focus, [64, 3]], # 0-P1/2
[-1, 1, Conv, [128, 3, 2]], # 1-P2/4
[-1, 3, C3, [128]], # 2-P2/4
[-1, 1, Conv, [256, 3, 2]], # 3-P3/8
[-1, 9, C3, [256]], # 4-P3/8
# stream two
[-4, 1, Focus, [64, 3]], # 5-P1/2
[-1, 1, Conv, [128, 3, 2]], # 6-P2/4
[-1, 3, C3, [128]], # 7-P2/4
[-1, 1, Conv, [256, 3, 2]], # 8-P3/8
[-1, 9, C3, [256]], # 9
请问这里第二流的输入为什么是-4，是因为在前向传播过程中使用的是-4作为条件所以无所谓吗