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

description	keywords
Explore detailed documentation of block modules in Ultralytics, available for deep learning tasks. Contribute and improve the codebase!.	Ultralytics, YOLO, neural networks, block modules, DFL, Proto, HGStem, HGBlock, SPP, SPPF, C1, C2, C2f, C3, C3x, RepC3, C3TR, C3Ghost, GhostBottleneck, Bottleneck, BottleneckCSP, ResNetBlock, MaxSigmoidAttnBlock, ImagePoolingAttn, ContrastiveHead, RepBottleneck, RepCSP, RepNCSPELAN4, ADown, SPPELAN, Silence, CBLinear, CBFuse

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

---

::: ultralytics.nn.modules.block.MaxSigmoidAttnBlock

---

::: ultralytics.nn.modules.block.C2fAttn

---

::: ultralytics.nn.modules.block.ImagePoolingAttn

---

::: ultralytics.nn.modules.block.ContrastiveHead

---

::: ultralytics.nn.modules.block.BNContrastiveHead

---

::: ultralytics.nn.modules.block.RepBottleneck

---

::: ultralytics.nn.modules.block.RepCSP

---

::: ultralytics.nn.modules.block.RepNCSPELAN4

---

::: ultralytics.nn.modules.block.ELAN1

---

::: ultralytics.nn.modules.block.AConv

---

::: ultralytics.nn.modules.block.ADown

---

::: ultralytics.nn.modules.block.SPPELAN

---

::: ultralytics.nn.modules.block.CBLinear

---

::: ultralytics.nn.modules.block.CBFuse

---

::: ultralytics.nn.modules.block.C3f

---

::: ultralytics.nn.modules.block.C3k2

---

::: ultralytics.nn.modules.block.C3k

---

::: ultralytics.nn.modules.block.RepVGGDW

---

::: ultralytics.nn.modules.block.CIB

---

::: ultralytics.nn.modules.block.C2fCIB

---

::: ultralytics.nn.modules.block.Attention

---

::: ultralytics.nn.modules.block.PSABlock

---

::: ultralytics.nn.modules.block.PSA

---

::: ultralytics.nn.modules.block.C2PSA

---

::: ultralytics.nn.modules.block.C2fPSA

---

::: ultralytics.nn.modules.block.SCDown

---

::: ultralytics.nn.modules.block.TorchVision

---

::: ultralytics.nn.modules.block.AAttn

---

::: ultralytics.nn.modules.block.ABlock

---

::: ultralytics.nn.modules.block.A2C2f

---

::: ultralytics.nn.modules.block.SwiGLUFFN

---

::: ultralytics.nn.modules.block.Residual

---

::: ultralytics.nn.modules.block.SAVPE