# Ultralytics 🚀 AGPL-3.0 License - https://ultralytics.com/license

# Ultralytics YOLOE-26 open-vocabulary instance segmentation model with P3/8 - P5/32 outputs
# Model docs: https://docs.ultralytics.com/models/yolo26
# Task docs: https://docs.ultralytics.com/tasks/segment

# Parameters
nc: 80 # number of classes
end2end: True # whether to use end-to-end mode
reg_max: 1 # DFL bins
text_model: mobileclip2:b
scales: # model compound scaling constants, i.e. 'model=yoloe-26n-seg.yaml' will call yoloe-26-seg.yaml with scale 'n'
  # [depth, width, max_channels]
  n: [0.50, 0.25, 1024] # summary: 347 layers, 5,615,540 parameters, 5,615,540 gradients, 11.7 GFLOPs
  s: [0.50, 0.50, 1024] # summary: 347 layers, 15,272,852 parameters, 15,272,852 gradients, 39.3 GFLOPs
  m: [0.50, 1.00, 512] # summary: 367 layers, 34,922,132 parameters, 34,922,132 gradients, 136.3 GFLOPs
  l: [1.00, 1.00, 512] # summary: 479 layers, 39,325,588 parameters, 39,325,588 gradients, 154.7 GFLOPs
  x: [1.00, 1.50, 512] # summary: 479 layers, 85,397,684 parameters, 85,397,684 gradients, 343.3 GFLOPs

# YOLOE26n 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, 2, C3k2, [256, False, 0.25]]
  - [-1, 1, Conv, [256, 3, 2]] # 3-P3/8
  - [-1, 2, C3k2, [512, False, 0.25]]
  - [-1, 1, Conv, [512, 3, 2]] # 5-P4/16
  - [-1, 2, C3k2, [512, True]]
  - [-1, 1, Conv, [1024, 3, 2]] # 7-P5/32
  - [-1, 2, C3k2, [1024, True]]
  - [-1, 1, SPPF, [1024, 5, 3, True]] # 9
  - [-1, 2, C2PSA, [1024]] # 10

# YOLOE26n head
head:
  - [-1, 1, nn.Upsample, [None, 2, "nearest"]]
  - [[-1, 6], 1, Concat, [1]] # cat backbone P4
  - [-1, 2, C3k2, [512, True]] # 13

  - [-1, 1, nn.Upsample, [None, 2, "nearest"]]
  - [[-1, 4], 1, Concat, [1]] # cat backbone P3
  - [-1, 2, C3k2, [256, True]] # 16 (P3/8-small)

  - [-1, 1, Conv, [256, 3, 2]]
  - [[-1, 13], 1, Concat, [1]] # cat head P4
  - [-1, 2, C3k2, [512, True]] # 19 (P4/16-medium)

  - [-1, 1, Conv, [512, 3, 2]]
  - [[-1, 10], 1, Concat, [1]] # cat head P5
  - [-1, 1, C3k2, [1024, True, 0.5, True]] # 22 (P5/32-large)

  - [[16, 19, 22], 1, YOLOESegment26, [nc, 32, 256, 512, True]] # YOLOESegment26(P3, P4, P5)