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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 |
| --- |
| |
| # Reference for `ultralytics/nn/modules/transformer.py` |
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| !!! Note |
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| This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/transformer.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/nn/modules/transformer.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/transformer.py) 🛠️. Thank you 🙏! |
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| <br> |
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| ## ::: ultralytics.nn.modules.transformer.TransformerEncoderLayer |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.AIFI |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.TransformerLayer |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.TransformerBlock |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.MLPBlock |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.MLP |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.LayerNorm2d |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.MSDeformAttn |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.DeformableTransformerDecoderLayer |
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| <br><br><hr><br> |
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| ## ::: ultralytics.nn.modules.transformer.DeformableTransformerDecoder |
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| <br><br> |
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