README.md

---
license: cc-by-4.0
datasets:
- UCSC-VLAA/Recap-DataComp-1B
- mlfoundations/datacomp_1b
library_name: open_clip
---
[[Paper]](https://arxiv.org/abs/2501.09446) [[github]](https://github.com/zw615/Double_Visual_Defense)

A DeltaCLIP-H/14-336 Model that is adversarially pre-trained with web-scale image-text data to reach non-robust-VLM helpfulness levels on clean data while being robust on adversarially attacked data.

## Model Usage
### With OpenCLIP
```
import torch
import torch.nn.functional as F
from urllib.request import urlopen
from PIL import Image
from open_clip import create_model_from_pretrained, get_tokenizer

model, preprocess = create_model_from_pretrained('hf-hub:zw123/delta_clip_l14_336')
tokenizer = get_tokenizer('hf-hub:zw123/delta_clip_l14_336')

image = Image.open(urlopen(
    'https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/beignets-task-guide.png'
))
image = preprocess(image).unsqueeze(0)

text = tokenizer(["a diagram", "a dog", "a cat", "a beignet"], context_length=model.context_length)

with torch.no_grad(), torch.cuda.amp.autocast():
    image_features = model.encode_image(image)
    text_features = model.encode_text(text)
    image_features = F.normalize(image_features, dim=-1)
    text_features = F.normalize(text_features, dim=-1)

    text_probs = (100.0 * image_features @ text_features.T).softmax(dim=-1)

print("Label probs:", text_probs)  # prints: [[0., 0., 0., 1.0]]
```   

## Release
These models are released under the Creative Commons Attribution 4.0 license.

LLNL-DATA-2003001

## Citation
If you find this model useful, please consider citing our paper:
```bibtex
@article{wang2025double,
  title={Double Visual Defense: Adversarial Pre-training and Instruction Tuning for Improving Vision-Language Model Robustness},
  author={Wang, Zeyu and Xie, Cihang and Bartoldson, Brian and Kailkhura, Bhavya},
  journal={arXiv preprint arXiv:2501.09446},
  year={2025}
}
```