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Explore Ultralytics YOLO neural network modules, Proto to BottleneckCSP. Detailed explanation of each module with easy-to-follow code examples. YOLO, Ultralytics, neural network, nn.modules.block, Proto, HGBlock, SPPF, C2, C3, RepC3, C3Ghost, Bottleneck, BottleneckCSP

Reference for ultralytics/nn/modules/block.py

!!! Note

This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/block.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/block.py). If you spot a problem please help fix it by [contributing](https://docs.ultralytics.com/help/contributing/) a [Pull Request](https://github.com/ultralytics/ultralytics/edit/main/ultralytics/nn/modules/block.py) 🛠. Thank you 🙏!



::: ultralytics.nn.modules.block.DFL



::: ultralytics.nn.modules.block.Proto



::: ultralytics.nn.modules.block.HGStem



::: ultralytics.nn.modules.block.HGBlock



::: ultralytics.nn.modules.block.SPP



::: ultralytics.nn.modules.block.SPPF



::: ultralytics.nn.modules.block.C1



::: ultralytics.nn.modules.block.C2



::: ultralytics.nn.modules.block.C2f



::: ultralytics.nn.modules.block.C3



::: ultralytics.nn.modules.block.C3x



::: ultralytics.nn.modules.block.RepC3



::: ultralytics.nn.modules.block.C3TR



::: ultralytics.nn.modules.block.C3Ghost



::: ultralytics.nn.modules.block.GhostBottleneck



::: ultralytics.nn.modules.block.Bottleneck



::: ultralytics.nn.modules.block.BottleneckCSP



::: ultralytics.nn.modules.block.ResNetBlock



::: ultralytics.nn.modules.block.ResNetLayer