| # Ultralytics 🚀 AGPL-3.0 License - https://ultralytics.com/license | |
| # Ultralytics YOLOv8 object detection model with P3/8 - P5/32 outputs | |
| # Model docs: https://docs.ultralytics.com/models/yolov8 | |
| # Task docs: https://docs.ultralytics.com/tasks/detect | |
| # Employs Ghost convolutions and modules proposed in Huawei's GhostNet in https://arxiv.org/abs/1911.11907v2 | |
| # Parameters | |
| nc: 80 # number of classes | |
| scales: # model compound scaling constants, i.e. 'model=yolov8n.yaml' will call yolov8.yaml with scale 'n' | |
| # [depth, width, max_channels] | |
| n: [0.33, 0.25, 1024] # YOLOv8n-ghost summary: 403 layers, 1865316 parameters, 1865300 gradients, 5.8 GFLOPs | |
| s: [0.33, 0.50, 1024] # YOLOv8s-ghost summary: 403 layers, 5960072 parameters, 5960056 gradients, 16.4 GFLOPs | |
| m: [0.67, 0.75, 768] # YOLOv8m-ghost summary: 603 layers, 10336312 parameters, 10336296 gradients, 32.7 GFLOPs | |
| l: [1.00, 1.00, 512] # YOLOv8l-ghost summary: 803 layers, 14277872 parameters, 14277856 gradients, 53.7 GFLOPs | |
| x: [1.00, 1.25, 512] # YOLOv8x-ghost summary: 803 layers, 22229308 parameters, 22229292 gradients, 83.3 GFLOPs | |
| # YOLOv8.0n-ghost backbone | |
| backbone: | |
| # [from, repeats, module, args] | |
| - [-1, 1, Conv, [64, 3, 2]] # 0-P1/2 | |
| - [-1, 1, GhostConv, [128, 3, 2]] # 1-P2/4 | |
| - [-1, 3, C3Ghost, [128, True]] | |
| - [-1, 1, GhostConv, [256, 3, 2]] # 3-P3/8 | |
| - [-1, 6, C3Ghost, [256, True]] | |
| - [-1, 1, GhostConv, [512, 3, 2]] # 5-P4/16 | |
| - [-1, 6, C3Ghost, [512, True]] | |
| - [-1, 1, GhostConv, [1024, 3, 2]] # 7-P5/32 | |
| - [-1, 3, C3Ghost, [1024, True]] | |
| - [-1, 1, SPPF, [1024, 5]] # 9 | |
| # YOLOv8.0n head | |
| head: | |
| - [-1, 1, nn.Upsample, [None, 2, "nearest"]] | |
| - [[-1, 6], 1, Concat, [1]] # cat backbone P4 | |
| - [-1, 3, C3Ghost, [512]] # 12 | |
| - [-1, 1, nn.Upsample, [None, 2, "nearest"]] | |
| - [[-1, 4], 1, Concat, [1]] # cat backbone P3 | |
| - [-1, 3, C3Ghost, [256]] # 15 (P3/8-small) | |
| - [-1, 1, GhostConv, [256, 3, 2]] | |
| - [[-1, 12], 1, Concat, [1]] # cat head P4 | |
| - [-1, 3, C3Ghost, [512]] # 18 (P4/16-medium) | |
| - [-1, 1, GhostConv, [512, 3, 2]] | |
| - [[-1, 9], 1, Concat, [1]] # cat head P5 | |
| - [-1, 3, C3Ghost, [1024]] # 21 (P5/32-large) | |
| - [[15, 18, 21], 1, Detect, [nc]] # Detect(P3, P4, P5) | |