关于YOLOv9去掉辅助分支脚本使用的一些说明。

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专栏介绍：YOLOv9改进系列 | 包含深度学习最新创新，主力高效涨点！！！

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B站链接：YOLOv9去除辅助训练分支！_哔哩哔哩_bilibili

一、说明

        在subbranch_removal.py脚本中，我们需要填入上方两个参数，第一个是训练好权重文件，第二个是去掉辅助分支后的模型配置文件，以YOLOv9-c为例，对应去掉辅助分支后的模型配置文件为glen-c.yaml。

运行脚本，会在填入的weights路径下生成converted.pt文件，即为精简后的版本。

对比

以下为glen-c.yaml。

# YOLOv9
 
# parameters
nc: 80  # number of classes
depth_multiple: 1.0  # model depth multiple
width_multiple: 1.0  # layer channel multiple
#activation: nn.LeakyReLU(0.1)
#activation: nn.ReLU()
 
# anchors
anchors: 3
 
# gelan backbone
backbone:
  [
   # conv down
   [-1, 1, Conv, [64, 3, 2]],  # 0-P1/2
 
   # conv down
   [-1, 1, Conv, [128, 3, 2]],  # 1-P2/4
 
   # elan-1 block
   [-1, 1, RepNCSPELAN4, [256, 128, 64, 1]],  # 2
 
   # avg-conv down
   [-1, 1, ADown, [256]],  # 3-P3/8
 
   # elan-2 block
   [-1, 1, RepNCSPELAN4, [512, 256, 128, 1]],  # 4
 
   # avg-conv down
   [-1, 1, ADown, [512]],  # 5-P4/16
 
   # elan-2 block
   [-1, 1, RepNCSPELAN4, [512, 512, 256, 1]],  # 6
 
   # avg-conv down
   [-1, 1, ADown, [512]],  # 7-P5/32
 
   # elan-2 block
   [-1, 1, RepNCSPELAN4, [512, 512, 256, 1]],  # 8
  ]
 
# gelan head
head:
  [
   # elan-spp block
   [-1, 1, SPPELAN, [512, 256]],  # 9
 
   # up-concat merge
   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
   [[-1, 6], 1, Concat, [1]],  # cat backbone P4
 
   # elan-2 block
   [-1, 1, RepNCSPELAN4, [512, 512, 256, 1]],  # 12
 
   # up-concat merge
   [-1, 1, nn.Upsample, [None, 2, 'nearest']],
   [[-1, 4], 1, Concat, [1]],  # cat backbone P3
 
   # elan-2 block
   [-1, 1, RepNCSPELAN4, [256, 256, 128, 1]],  # 15 (P3/8-small)
 
   # avg-conv-down merge
   [-1, 1, ADown, [256]],
   [[-1, 12], 1, Concat, [1]],  # cat head P4
 
   # elan-2 block
   [-1, 1, RepNCSPELAN4, [512, 512, 256, 1]],  # 18 (P4/16-medium)
 
   # avg-conv-down merge
   [-1, 1, ADown, [512]],
   [[-1, 9], 1, Concat, [1]],  # cat head P5
 
   # elan-2 block
   [-1, 1, RepNCSPELAN4, [512, 512, 256, 1]],  # 21 (P5/32-large)
 
   # detect
   [[15, 18, 21], 1, DDetect, [nc]],  # DDetect(P3, P4, P5)
  ]

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