enginex-mlu370-any2any/transformers/docs/source/en/model_doc/vit_mae.md

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*This model was released on 2021-11-11 and added to Hugging Face Transformers on 2022-01-18.*

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# ViTMAE

[ViTMAE](https://huggingface.co/papers/2111.06377) is a self-supervised vision model that is pretrained by masking large portions of an image (~75%). An encoder processes the visible image patches and a decoder reconstructs the missing pixels from the encoded patches and mask tokens. After pretraining, the encoder can be reused for downstream tasks like image classification or object detection — often outperforming models trained with supervised learning.

<img src="https://user-images.githubusercontent.com/11435359/146857310-f258c86c-fde6-48e8-9cee-badd2b21bd2c.png"
alt="drawing" width="600"/>

You can find all the original ViTMAE checkpoints under the [AI at Meta](https://huggingface.co/facebook?search_models=vit-mae) organization.

> [!TIP]
> Click on the ViTMAE models in the right sidebar for more examples of how to apply ViTMAE to vision tasks.

The example below demonstrates how to reconstruct the missing pixels with the [`ViTMAEForPreTraining`] class.

<hfoptions id="usage">
<hfoption id="AutoModel">

```python
import torch
import requests
from PIL import Image
from transformers import infer_device, ViTImageProcessor, ViTMAEForPreTraining

device = infer_device()

url = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg"
image = Image.open(requests.get(url, stream=True).raw)

processor = ViTImageProcessor.from_pretrained("facebook/vit-mae-base")
inputs = processor(image, return_tensors="pt")
inputs = {k: v.to(device) for k, v in inputs.items()}

model = ViTMAEForPreTraining.from_pretrained("facebook/vit-mae-base", attn_implementation="sdpa").to(device)
with torch.no_grad():
    outputs = model(**inputs)

reconstruction = outputs.logits
```

</hfoption>
</hfoptions>

## Notes
- ViTMAE is typically used in two stages. Self-supervised pretraining with [`ViTMAEForPreTraining`], and then discarding the decoder and fine-tuning the encoder. After fine-tuning, the weights can be plugged into a model like [`ViTForImageClassification`].
- Use [`ViTImageProcessor`] for input preparation.

## Resources

- Refer to this [notebook](https://github.com/NielsRogge/Transformers-Tutorials/blob/master/ViTMAE/ViT_MAE_visualization_demo.ipynb) to learn how to visualize the reconstructed pixels from [`ViTMAEForPreTraining`].

## ViTMAEConfig

[[autodoc]] ViTMAEConfig

## ViTMAEModel

[[autodoc]] ViTMAEModel
    - forward

## ViTMAEForPreTraining

[[autodoc]] transformers.ViTMAEForPreTraining
    - forward