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ultralytics/docs/en/reference/nn/modules/block.md
Glenn Jocher f2d3aed634
ultralytics 8.4.0 YOLO26 Models Release (#23176) 
Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: Laughing-q <1185102784@qq.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>
2026-01-14 03:44:38 +00:00

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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

!!! success "Improvements"

This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/block.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/block.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — 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




::: ultralytics.nn.modules.block.Proto26




::: ultralytics.nn.modules.block.RealNVP