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*This model was published in HF papers on 2020-10-22 and contributed to Hugging Face Transformers on 2021-04-01.*

<div style="float: right;">
    <div class="flex flex-wrap space-x-1">
        <img alt="SDPA" src="https://img.shields.io/badge/SDPA-DE3412?style=flat&logo=pytorch&logoColor=white">
    </div>
</div>

# Vision Transformer (ViT)

[Vision Transformer (ViT)](https://huggingface.co/papers/2010.11929) is a transformer adapted for computer vision tasks. An image is split into smaller fixed-sized patches which are treated as a sequence of tokens, similar to words for NLP tasks. ViT requires less resources to pretrain compared to convolutional architectures and its performance on large datasets can be transferred to smaller downstream tasks.

You can find all the original ViT checkpoints under the [Google](https://huggingface.co/google?search_models=vit) organization.

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

The example below demonstrates how to classify an image with [`Pipeline`] or the [`AutoModel`] class.

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

```python
from transformers import pipeline


pipeline = pipeline(
    task="image-classification",
    model="google/vit-base-patch16-224",
    device=0
)
pipeline("https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg")
```

</hfoption>
<hfoption id="AutoModel">

```python
import requests
import torch
from PIL import Image

from transformers import AutoImageProcessor, AutoModelForImageClassification


image_processor = AutoImageProcessor.from_pretrained(
    "google/vit-base-patch16-224",
    use_fast=True,
)
model = AutoModelForImageClassification.from_pretrained(
    "google/vit-base-patch16-224",
    device_map="auto",
    attn_implementation="sdpa"
)
url = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg"
image = Image.open(requests.get(url, stream=True).raw)
inputs = image_processor(image, return_tensors="pt").to(model.device)

with torch.no_grad():
  logits = model(**inputs).logits
predicted_class_id = logits.argmax(dim=-1).item()

class_labels = model.config.id2label
predicted_class_label = class_labels[predicted_class_id]
print(f"The predicted class label is: {predicted_class_label}")
```

</hfoption>
</hfoptions>

## Notes

- The best results are obtained with supervised pretraining, and during fine-tuning, it may be better to use images with a resolution higher than 224x224.
- Use [`ViTImageProcessor`] to resize (or rescale) and normalize images to the expected size.
- The patch and image resolution are reflected in the checkpoint name. For example, google/vit-base-patch16-224, is the **base-sized** architecture with a patch resolution of 16x16 and fine-tuning resolution of 224x224.

## ViTConfig

[[autodoc]] ViTConfig

## ViTImageProcessor

[[autodoc]] ViTImageProcessor
    - preprocess

## ViTImageProcessorPil

[[autodoc]] ViTImageProcessorPil
    - preprocess


## ViTModel

[[autodoc]] ViTModel
    - forward

## ViTForMaskedImageModeling

[[autodoc]] ViTForMaskedImageModeling
    - forward

## ViTForImageClassification

[[autodoc]] ViTForImageClassification
    - forward
