单目3D初始代码

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description: Explore activation functions in Ultralytics, including the Unified activation function and other custom implementations for neural networks.
keywords: ultralytics, activation functions, neural networks, Unified activation, AGLU, SiLU, ReLU, PyTorch, deep learning, custom activations
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# Reference for `ultralytics/nn/modules/activation.py`
!!! success "Improvements"
This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/activation.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/activation.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — thank you! 🙏
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## ::: ultralytics.nn.modules.activation.AGLU
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description: Explore detailed documentation of block modules in Ultralytics, available for deep learning tasks. Contribute and improve the codebase.
keywords: 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
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# Reference for `ultralytics/nn/modules/block.py`
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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! 🙏
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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
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## ::: ultralytics.nn.modules.block.ResNetBlock
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## ::: ultralytics.nn.modules.block.ResNetLayer
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## ::: ultralytics.nn.modules.block.MaxSigmoidAttnBlock
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## ::: ultralytics.nn.modules.block.C2fAttn
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## ::: ultralytics.nn.modules.block.ImagePoolingAttn
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## ::: ultralytics.nn.modules.block.ContrastiveHead
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## ::: ultralytics.nn.modules.block.BNContrastiveHead
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## ::: ultralytics.nn.modules.block.RepBottleneck
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## ::: ultralytics.nn.modules.block.RepCSP
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## ::: ultralytics.nn.modules.block.RepNCSPELAN4
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## ::: ultralytics.nn.modules.block.ELAN1
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## ::: ultralytics.nn.modules.block.AConv
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## ::: ultralytics.nn.modules.block.ADown
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## ::: ultralytics.nn.modules.block.SPPELAN
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## ::: ultralytics.nn.modules.block.CBLinear
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## ::: ultralytics.nn.modules.block.CBFuse
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## ::: ultralytics.nn.modules.block.C3f
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## ::: ultralytics.nn.modules.block.C3k2
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## ::: ultralytics.nn.modules.block.C3k
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## ::: ultralytics.nn.modules.block.RepVGGDW
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## ::: ultralytics.nn.modules.block.CIB
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## ::: ultralytics.nn.modules.block.C2fCIB
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## ::: ultralytics.nn.modules.block.Attention
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## ::: ultralytics.nn.modules.block.PSABlock
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## ::: ultralytics.nn.modules.block.PSA
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## ::: ultralytics.nn.modules.block.C2PSA
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## ::: ultralytics.nn.modules.block.C2fPSA
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## ::: ultralytics.nn.modules.block.SCDown
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## ::: ultralytics.nn.modules.block.TorchVision
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## ::: ultralytics.nn.modules.block.AAttn
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## ::: ultralytics.nn.modules.block.ABlock
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## ::: ultralytics.nn.modules.block.A2C2f
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## ::: ultralytics.nn.modules.block.SwiGLUFFN
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## ::: ultralytics.nn.modules.block.Residual
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## ::: ultralytics.nn.modules.block.SAVPE
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## ::: ultralytics.nn.modules.block.Proto26
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## ::: ultralytics.nn.modules.block.RealNVP
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description: Explore detailed documentation on convolution modules like Conv, LightConv, GhostConv, and more used in Ultralytics models.
keywords: Ultralytics, convolution modules, Conv, LightConv, GhostConv, YOLO, deep learning, neural networks
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# Reference for `ultralytics/nn/modules/conv.py`
!!! success "Improvements"
This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/conv.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/conv.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — thank you! 🙏
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## ::: ultralytics.nn.modules.conv.Conv
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## ::: ultralytics.nn.modules.conv.Conv2
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## ::: ultralytics.nn.modules.conv.LightConv
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## ::: ultralytics.nn.modules.conv.DWConv
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## ::: ultralytics.nn.modules.conv.DWConvTranspose2d
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## ::: ultralytics.nn.modules.conv.ConvTranspose
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## ::: ultralytics.nn.modules.conv.Focus
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## ::: ultralytics.nn.modules.conv.GhostConv
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## ::: ultralytics.nn.modules.conv.RepConv
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## ::: ultralytics.nn.modules.conv.ChannelAttention
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## ::: ultralytics.nn.modules.conv.SpatialAttention
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## ::: ultralytics.nn.modules.conv.CBAM
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## ::: ultralytics.nn.modules.conv.Concat
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## ::: ultralytics.nn.modules.conv.Index
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## ::: ultralytics.nn.modules.conv.autopad
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description: Explore docs covering Ultralytics YOLO detection, pose & RTDETRDecoder. Comprehensive guides to help you understand Ultralytics nn modules.
keywords: Ultralytics, YOLO, Detection, Pose, RTDETRDecoder, nn modules, guides
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# Reference for `ultralytics/nn/modules/head.py`
!!! success "Improvements"
This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/head.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/head.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — thank you! 🙏
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## ::: ultralytics.nn.modules.head.Detect
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## ::: ultralytics.nn.modules.head.Segment
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## ::: ultralytics.nn.modules.head.Segment26
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## ::: ultralytics.nn.modules.head.OBB
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## ::: ultralytics.nn.modules.head.OBB26
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## ::: ultralytics.nn.modules.head.Pose
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## ::: ultralytics.nn.modules.head.Pose26
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## ::: ultralytics.nn.modules.head.Classify
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## ::: ultralytics.nn.modules.head.WorldDetect
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## ::: ultralytics.nn.modules.head.LRPCHead
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## ::: ultralytics.nn.modules.head.YOLOEDetect
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## ::: ultralytics.nn.modules.head.YOLOESegment
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## ::: ultralytics.nn.modules.head.YOLOESegment26
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## ::: ultralytics.nn.modules.head.RTDETRDecoder
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## ::: ultralytics.nn.modules.head.v10Detect
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description: Learn about Ultralytics transformer encoder, layer, MLP block, LayerNorm2d and the deformable transformer decoder layer. Expand your understanding of these crucial AI modules.
keywords: Ultralytics, Ultralytics documentation, TransformerEncoderLayer, TransformerLayer, MLPBlock, LayerNorm2d, DeformableTransformerDecoderLayer
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# Reference for `ultralytics/nn/modules/transformer.py`
!!! success "Improvements"
This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/transformer.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/transformer.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — thank you! 🙏
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## ::: ultralytics.nn.modules.transformer.TransformerEncoderLayer
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## ::: ultralytics.nn.modules.transformer.AIFI
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## ::: ultralytics.nn.modules.transformer.TransformerLayer
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## ::: ultralytics.nn.modules.transformer.TransformerBlock
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## ::: ultralytics.nn.modules.transformer.MLPBlock
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## ::: ultralytics.nn.modules.transformer.MLP
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## ::: ultralytics.nn.modules.transformer.LayerNorm2d
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## ::: ultralytics.nn.modules.transformer.MSDeformAttn
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## ::: ultralytics.nn.modules.transformer.DeformableTransformerDecoderLayer
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## ::: ultralytics.nn.modules.transformer.DeformableTransformerDecoder
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description: Explore the detailed reference of utility functions in the Ultralytics PyTorch modules. Learn about initialization, inverse sigmoid, and multiscale deformable attention.
keywords: Ultralytics, PyTorch, utils, initialization, inverse sigmoid, multiscale deformable attention, deep learning, neural networks
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# Reference for `ultralytics/nn/modules/utils.py`
!!! success "Improvements"
This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/utils.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/utils.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — thank you! 🙏
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## ::: ultralytics.nn.modules.utils._get_clones
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## ::: ultralytics.nn.modules.utils.bias_init_with_prob
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## ::: ultralytics.nn.modules.utils.linear_init
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## ::: ultralytics.nn.modules.utils.inverse_sigmoid
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## ::: ultralytics.nn.modules.utils.multi_scale_deformable_attn_pytorch
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