# DINOv2: Learning Robust Visual Features without Supervision
**[Meta AI Research, FAIR](https://ai.facebook.com/research/)**
Maxime Oquab,
Timothée Darcet,
Théo Moutakanni,
Huy Vo,
Marc Szafraniec,
Vasil Khalidov,
Patrick Labatut,
Armand Joulin,
Piotr Bojanowski
[[`Paper`](https://arxiv.org/abs/2304.07193)] [[`Blog`](https://ai.facebook.com/blog/dino-v2-computer-vision-self-supervised-learning/)] [[`Demo`](https://dinov2.metademolab.com)] [[`BibTeX`](#citing-dinov2)]
PyTorch implementation and pretrained models for DINOv2. For details, see the paper: **DINOv2: Learning Robust Visual Features without Supervision**.
DINOv2 models produce high-performance visual features that can be directly employed with classifiers as simple as linear layers on a variety of computer vision tasks; these visual features are robust and perform well across domains without any requirement for fine-tuning. The models were pretrained on a dataset of 142 M images without using any labels or annotations.
https://user-images.githubusercontent.com/60359573/230078733-5faffa19-e6ce-4c55-9200-62dd76f8236a.mp4
Visualization of the three first principal components of the patch features of all frames, mapped to RGB values.
## Pretrained models
### Pretrained models via PyTorch Hub
Please follow the instructions [here](https://pytorch.org/get-started/locally/) to install the PyTorch and torchvision dependencies (these are the only required dependencies). Installing both PyTorch and torchvision with CUDA support is strongly recommended.
The corresponding model card can be found in the [[`MODEL_CARD.md`](MODEL_CARD.md)] file.
```python
import torch
dinov2_vits14 = torch.hub.load('facebookresearch/dinov2', 'dinov2_vits14')
dinov2_vitb14 = torch.hub.load('facebookresearch/dinov2', 'dinov2_vitb14')
dinov2_vitl14 = torch.hub.load('facebookresearch/dinov2', 'dinov2_vitl14')
dinov2_vitg14 = torch.hub.load('facebookresearch/dinov2', 'dinov2_vitg14')
```
## Installation
The training and evaluation code requires PyTorch 2.0 and xFormers 0.0.18 as well as a number of other 3rd party packages. To setup all the required dependencies for training and evaluation, please follow the instructions below:
*conda* **(Recommended)** - Create and activate a `dinov2` conda environment using the provided environment definition:
```shell
conda env create -f conda.yaml
conda activate dinov2
```
*pip* - Use the provided `requirements.txt` to install the dependencies:
```shell
pip install -r requirements.txt
```
## Data preparation
Expected contents for the ImageNet-1k data folder:
- `/test/ILSVRC2012_test_00000001.JPEG`
- `/test/[..]`
- `/test/ILSVRC2012_test_00100000.JPEG`
- `/train/n01440764/n01440764_10026.JPEG`
- `/train/[...]`
- `/train/n15075141/n15075141_9993.JPEG`
- `/val/n01440764/ILSVRC2012_val_00000293.JPEG`
- `/val/[...]`
- `/val/n15075141/ILSVRC2012_val_00049174.JPEG`
- `/labels.txt`
For ImageNet-22k, please adapt the Dataset object accordingly.
## Training
### Fast setup: training DINOv2 ViT-L/16 on ImageNet-1k
Run DINOv2 on 4 A100-80GB nodes (32 GPUs) in a SLURM cluster environment with submitit.
```shell
python dinov2/run/train/train.py \
--nodes 4 \
--config-file dinov2/configs/train/vitl16_short.yaml \
--output-dir \
train.dataset_path=ImageNet:split=TRAIN:root=:extra=
```
Training time is approximately 1 day and the resulting checkpoint should reach 81.6% on k-NN eval and 82.9% on linear eval.
The training code saves the weights of the teacher in the `eval` folder every 12500 iterations for evaluation.
### Long setup: training DINOv2 ViT-L/14 on ImageNet-22k
Run on 12 A100-80GB nodes (96 GPUs) in a SLURM cluster environment with submitit.
```
python dinov2/run/train/train.py \
--nodes 12 \
--config-file dinov2/configs/train/vitl14.yaml \
--output-dir \
train.dataset_path=ImageNet22k:root=:extra=
```
Training time is approximately 3.3 days and the resulting checkpoint should reach 82.0% on k-NN eval and 84.5% on linear eval.
The training code saves the weights of the teacher in the `eval` folder every 12500 iterations for evaluation.
## Evaluation
The training code regularly saves the teacher weights. In order to evaluate the model, run the following evaluation on a single node:
### k-NN classification on ImageNet-1k
```
python dinov2/run/eval/knn.py \
--config-file /config.yaml \
--pretrained-weights /eval/training_24999/teacher_checkpoint.pth \
--output-dir /eval/training_24999/knn \
--train-dataset ImageNet:split=TRAIN:root=:extra= \
--val-dataset ImageNet:split=VAL:root=:extra=
```
### Logistic regression classification on ImageNet-1k
```
python dinov2/run/eval/log_regression.py \
--config-file /config.yaml \
--pretrained-weights /eval/training_24999/teacher_checkpoint.pth \
--output-dir /eval/training_24999/logreg \
--train-dataset ImageNet:split=TRAIN:root=:extra= \
--val-dataset ImageNet:split=VAL:root=:extra=
```
### Linear classification with data augmentation on ImageNet-1k
```
python dinov2/run/eval/linear.py \
--config-file /config.yaml \
--pretrained-weights /eval/training_24999/teacher_checkpoint.pth \
--output-dir /eval/training_24999/linear \
--train-dataset ImageNet:split=TRAIN:root=:extra= \
--val-dataset ImageNet:split=VAL:root=:extra=
```
We release the weights from evaluating the different models:
The performance of the provided pretrained model weights can be evaluated as follows on ImageNet-1k:
```
python dinov2/run/eval/linear.py \
--config-file dinov2/configs/eval/vitg14_pretrain.yaml \
--pretrained-weights https://dl.fbaipublicfiles.com/dinov2/dinov2_vitg14/dinov2_vitg14_pretrain.pth \
--train-dataset ImageNet:split=TRAIN:root=:extra= \
--val-dataset ImageNet:split=VAL:root=:extra=
```
## License
This repository and the models are released under the CC-BY-NC as found in the [LICENSE](LICENSE) file.
## Contributing
See [contributing](CONTRIBUTING.md) and the [code of conduct](CODE_OF_CONDUCT.md).
## Citing DINOv2
If you find this repository useful, please consider giving a star :star: and citation :t-rex::
```
@misc{oquab2023dinov2,
title={DINOv2: Learning Robust Visual Features without Supervision},
author={Oquab, Maxime and Darcet, Timothée and Moutakanni, Theo and Vo, Huy and Szafraniec, Marc and Khalidov, Vasil and Fernandez, Pierre and Haziza, Daniel and Massa, Francisco and El-Nouby, Alaaeldin and Howes, Russell and Huang, Po-Yao and Xu, Hu and Sharma, Vasu and Li, Shang-Wen and Galuba, Wojciech and Rabbat, Mike and Assran, Mido and Ballas, Nicolas and Synnaeve, Gabriel and Misra, Ishan and Jegou, Herve and Mairal, Julien and Labatut, Patrick and Joulin, Armand and Bojanowski, Piotr},
journal={arXiv:2304.07193},
year={2023}
}
```