SignatureDetection/ultralytics/docs/reference/nn/modules/block.md

metadata

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

Reference for ultralytics/nn/modules/block.py

!!! note

Full source code for 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). Help us fix any issues you see by submitting a [Pull Request](https://docs.ultralytics.com/help/contributing/) 🛠️. Thank you 🙏!

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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