| 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` | |
| !!! Note | |
| 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 🙏! | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.TransformerEncoderLayer | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.AIFI | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.TransformerLayer | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.TransformerBlock | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.MLPBlock | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.MLP | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.LayerNorm2d | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.MSDeformAttn | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.DeformableTransformerDecoderLayer | |
| <br><br> | |
| ## ::: ultralytics.nn.modules.transformer.DeformableTransformerDecoder | |
| <br><br> | |