README.md

---
pipeline_tag: image-classification
license: apache-2.0
base_model: timm/vit_tiny_patch16_224.augreg_in21k
library_name: kerasformers
tags:
- keras
- kerasformers
- image-classification
- vit
- backbone
- arxiv:2010.11929
- pytorch
- jax
- tf
---

## ***See [our collection](https://huggingface.co/collections/kerasformers/vit-6a6d51a16516088e6ab2ec60) for all versions of ViT.***

# Run ViT with Keras 3: JAX, PyTorch, or TensorFlow

[![GitHub](https://img.shields.io/badge/GitHub-KerasFormers-black?logo=github)](https://github.com/IMvision12/KerasFormers) [![Docs](https://img.shields.io/badge/Docs-ViT-blue)](https://imvision12.github.io/KerasFormers/classification_backbones/) [![Collection](https://img.shields.io/badge/HF-ViT%20collection-yellow)](https://huggingface.co/collections/kerasformers/vit-6a6d51a16516088e6ab2ec60)

# kerasformers/vit_tiny_patch16_224_augreg_in21k

Paper: [An Image is Worth 16x16 Words: Transformers for Image Recognition at Scale (arXiv:2010.11929)](https://arxiv.org/abs/2010.11929) · [HF Papers](https://huggingface.co/papers/2010.11929)

Vision Transformer (ViT) patches an image and runs a transformer encoder. Use `ViTImageClassify` for logits or `ViTModel` for tokens / per-block features via `as_backbone=True`.

For more details on the model, please go to the upstream [model card](https://huggingface.co/timm/vit_tiny_patch16_224.augreg_in21k).

Pure-**Keras 3** conversion of [`timm/vit_tiny_patch16_224.augreg_in21k`](https://huggingface.co/timm/vit_tiny_patch16_224.augreg_in21k) for [kerasformers](https://github.com/IMvision12/KerasFormers). One implementation runs unmodified on **TensorFlow / Torch / JAX**.

This is an **image-classification / backbone** checkpoint (`ViTImageClassify` / `ViTModel`).

## ✨ Quick start

```python
import os
os.environ["KERAS_BACKEND"] = "torch"  # or "jax" / "tensorflow"

from PIL import Image
import numpy as np
from kerasformers.models.vit import ViTImageClassify, ViTModel

model = ViTImageClassify.from_weights("kerasformers/vit_tiny_patch16_224_augreg_in21k")
backbone = ViTModel.from_weights(
    "kerasformers/vit_tiny_patch16_224_augreg_in21k", as_backbone=True
)

image = Image.open("your_image.jpg").convert("RGB")
image = image.resize((224, 224))
x = np.asarray(image, dtype="float32")[None]  # (1, H, W, 3)
print(model(x).shape)  # (1, num_classes)
feats = backbone(x)
print(len(feats), [tuple(f.shape) for f in feats])
```

Load any ViT variant the same way with `from_weights("kerasformers/<variant>")`:

| Variant | Hub |
|---|---|
| `vit_base_patch16_224_augreg_in1k` | [`kerasformers/vit_base_patch16_224_augreg_in1k`](https://huggingface.co/kerasformers/vit_base_patch16_224_augreg_in1k) |
| `vit_base_patch16_224_augreg_in21k` | [`kerasformers/vit_base_patch16_224_augreg_in21k`](https://huggingface.co/kerasformers/vit_base_patch16_224_augreg_in21k) |
| `vit_base_patch16_224_augreg_in21k_ft_in1k` | [`kerasformers/vit_base_patch16_224_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_base_patch16_224_augreg_in21k_ft_in1k) |
| `vit_base_patch16_224_orig_in21k_ft_in1k` | [`kerasformers/vit_base_patch16_224_orig_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_base_patch16_224_orig_in21k_ft_in1k) |
| `vit_base_patch16_384_augreg_in1k` | [`kerasformers/vit_base_patch16_384_augreg_in1k`](https://huggingface.co/kerasformers/vit_base_patch16_384_augreg_in1k) |
| `vit_base_patch16_384_augreg_in21k_ft_in1k` | [`kerasformers/vit_base_patch16_384_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_base_patch16_384_augreg_in21k_ft_in1k) |
| `vit_base_patch16_384_orig_in21k_ft_in1k` | [`kerasformers/vit_base_patch16_384_orig_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_base_patch16_384_orig_in21k_ft_in1k) |
| `vit_base_patch32_224_augreg_in1k` | [`kerasformers/vit_base_patch32_224_augreg_in1k`](https://huggingface.co/kerasformers/vit_base_patch32_224_augreg_in1k) |
| `vit_base_patch32_224_augreg_in21k` | [`kerasformers/vit_base_patch32_224_augreg_in21k`](https://huggingface.co/kerasformers/vit_base_patch32_224_augreg_in21k) |
| `vit_base_patch32_224_augreg_in21k_ft_in1k` | [`kerasformers/vit_base_patch32_224_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_base_patch32_224_augreg_in21k_ft_in1k) |
| `vit_base_patch32_384_augreg_in1k` | [`kerasformers/vit_base_patch32_384_augreg_in1k`](https://huggingface.co/kerasformers/vit_base_patch32_384_augreg_in1k) |
| `vit_base_patch32_384_augreg_in21k_ft_in1k` | [`kerasformers/vit_base_patch32_384_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_base_patch32_384_augreg_in21k_ft_in1k) |
| `vit_large_patch16_224_augreg_in21k` | [`kerasformers/vit_large_patch16_224_augreg_in21k`](https://huggingface.co/kerasformers/vit_large_patch16_224_augreg_in21k) |
| `vit_large_patch16_224_augreg_in21k_ft_in1k` | [`kerasformers/vit_large_patch16_224_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_large_patch16_224_augreg_in21k_ft_in1k) |
| `vit_large_patch16_384_augreg_in21k_ft_in1k` | [`kerasformers/vit_large_patch16_384_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_large_patch16_384_augreg_in21k_ft_in1k) |
| `vit_large_patch32_384_orig_in21k_ft_in1k` | [`kerasformers/vit_large_patch32_384_orig_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_large_patch32_384_orig_in21k_ft_in1k) |
| `vit_small_patch16_224_augreg_in1k` | [`kerasformers/vit_small_patch16_224_augreg_in1k`](https://huggingface.co/kerasformers/vit_small_patch16_224_augreg_in1k) |
| `vit_small_patch16_224_augreg_in21k` | [`kerasformers/vit_small_patch16_224_augreg_in21k`](https://huggingface.co/kerasformers/vit_small_patch16_224_augreg_in21k) |
| `vit_small_patch16_224_augreg_in21k_ft_in1k` | [`kerasformers/vit_small_patch16_224_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_small_patch16_224_augreg_in21k_ft_in1k) |
| `vit_small_patch16_384_augreg_in1k` | [`kerasformers/vit_small_patch16_384_augreg_in1k`](https://huggingface.co/kerasformers/vit_small_patch16_384_augreg_in1k) |
| `vit_small_patch16_384_augreg_in21k_ft_in1k` | [`kerasformers/vit_small_patch16_384_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_small_patch16_384_augreg_in21k_ft_in1k) |
| `vit_small_patch32_224_augreg_in21k` | [`kerasformers/vit_small_patch32_224_augreg_in21k`](https://huggingface.co/kerasformers/vit_small_patch32_224_augreg_in21k) |
| `vit_small_patch32_224_augreg_in21k_ft_in1k` | [`kerasformers/vit_small_patch32_224_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_small_patch32_224_augreg_in21k_ft_in1k) |
| `vit_small_patch32_384_augreg_in21k_ft_in1k` | [`kerasformers/vit_small_patch32_384_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_small_patch32_384_augreg_in21k_ft_in1k) |
| `vit_tiny_patch16_224_augreg_in21k` | [`kerasformers/vit_tiny_patch16_224_augreg_in21k`](https://huggingface.co/kerasformers/vit_tiny_patch16_224_augreg_in21k) |
| `vit_tiny_patch16_224_augreg_in21k_ft_in1k` | [`kerasformers/vit_tiny_patch16_224_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_tiny_patch16_224_augreg_in21k_ft_in1k) |
| `vit_tiny_patch16_384_augreg_in21k_ft_in1k` | [`kerasformers/vit_tiny_patch16_384_augreg_in21k_ft_in1k`](https://huggingface.co/kerasformers/vit_tiny_patch16_384_augreg_in21k_ft_in1k) |

## Tips

- Set `KERAS_BACKEND` **before** importing Keras / kerasformers.
- `ViTImageClassify` returns class logits; `ViTModel` returns features (`as_backbone=True` for multi-scale stages).
- See [docs](https://imvision12.github.io/KerasFormers/classification_backbones/) and [Loading Weights](https://imvision12.github.io/KerasFormers/loading_weights/).
- Upstream / timm checkpoints: `ViTImageClassify.from_weights("hf:timm/vit_tiny_patch16_224.augreg_in21k")`.

## Special Thanks

A huge thank you to the ViT authors and the timm / Hub communities for creating and releasing these models.

License: see YAML `license` (usually matches the upstream checkpoint).