# Ultralytics YOLO 🚀, GPL-3.0 license

# Parameters
nc: 80  # number of classes
depth_multiple: 1.00  # scales module repeats
width_multiple: 1.25  # scales convolution channels

# YOLOv8.0x6 backbone
backbone:
  # [from, repeats, module, args]
  - [-1, 1, Conv, [64, 3, 2]]  # 0-P1/2
  - [-1, 1, Conv, [128, 3, 2]]  # 1-P2/4
  - [-1, 3, C2f, [128, True]]
  - [-1, 1, Conv, [256, 3, 2]]  # 3-P3/8
  - [-1, 6, C2f, [256, True]]
  - [-1, 1, Conv, [512, 3, 2]]  # 5-P4/16
  - [-1, 6, C2f, [512, True]]
  - [-1, 1, Conv, [512, 3, 2]]  # 7-P5/32
  - [-1, 3, C2f, [512, True]]
  - [-1, 1, Conv, [512, 3, 2]]  # 9-P6/64
  - [-1, 3, C2f, [512, True]]
  - [-1, 1, SPPF, [512, 5]]  # 11

# YOLOv8.0x6 head
head:
  - [-1, 1, nn.Upsample, [None, 2, 'nearest']]
  - [[-1, 8], 1, Concat, [1]]  # cat backbone P5
  - [-1, 3, C2, [512, False]]  # 14

  - [-1, 1, nn.Upsample, [None, 2, 'nearest']]
  - [[-1, 6], 1, Concat, [1]]  # cat backbone P4
  - [-1, 3, C2, [512, False]]  # 17

  - [-1, 1, nn.Upsample, [None, 2, 'nearest']]
  - [[-1, 4], 1, Concat, [1]]  # cat backbone P3
  - [-1, 3, C2, [256, False]]  # 20 (P3/8-small)

  - [-1, 1, Conv, [256, 3, 2]]
  - [[-1, 17], 1, Concat, [1]]  # cat head P4
  - [-1, 3, C2, [512, False]]  # 23 (P4/16-medium)

  - [-1, 1, Conv, [512, 3, 2]]
  - [[-1, 14], 1, Concat, [1]]  # cat head P5
  - [-1, 3, C2, [512, False]]  # 26 (P5/32-large)

  - [-1, 1, Conv, [512, 3, 2]]
  - [[-1, 11], 1, Concat, [1]]  # cat head P6
  - [-1, 3, C2, [512, False]]  # 29 (P6/64-xlarge)

  - [[20, 23, 26, 29], 1, Detect, [nc]]  # Detect(P3, P4, P5, P6)