CondViT computes conditional image embeddings, to extract specific features out of complex images. This codebase shows how to train it on LAION — Referred Visual Search — Fashion, with clothing categories. It can easily be modified to use free text embeddings as conditioning, such as BLIP2 captions provided in the dataset.

Categorical CondViT Results : Textual CondViT Results :

git clone [email protected]:Simon-Lepage/CondViT-LRVSF.git
cd CondViT-LRVSF; pip install -e .

import clip 

torch.save(clip.load("ViT-B/32")[0].visual.state_dict(), "models/CLIP_B32_visual.pth")
torch.save(clip.load("ViT-B/16")[0].visual.state_dict(), "models/CLIP_B16_visual.pth")

We recommend img2dataset to download the images.

• Training products should be stored in tarfiles in a TRAIN folder, as the training uses webdataset. For each product, its image should be stored as {PRODUCT_ID}.{i}.jpg and accompagnied by a <PRODUCT_ID>.json file with each i as keys of metadata. This will require reorganising the tarfiles natively produced by img2dataset.

  Exemple

  ...
  230537.0.jpg
  230537.1.jpg
  230537.json => {
      "0": {
          "URL": "https://img01.ztat.net/article/LE/22/2G/09/CQ/11/[email protected]?imwidth=762",
          "TYPE": "COMPLEX",
          "SPLIT": "train",
          [...]
      },
      "1": {
          "URL": "https://img01.ztat.net/article/LE/22/2G/09/CQ/11/[email protected]?imwidth=300&filter=packshot",
          "TYPE": "SIMPLE",
          "SPLIT": "train",
          "CATEGORY": "Lower Body",
          "blip2_caption1": "levi's black jean trousers - skinny fit",
          [ ... ]
      }
  }
  ...
  

• Validation products should also be stored in VALID/prods.tar following the same format. Validation distractors should be stored in VALID/dist_{i}.tar as {ID}.jpg, {ID}.json. The JSON file should directly contain metadata.

  Exemple

  ...
  989760.jpg
  989760.json => {
      "URL": "https://img01.ztat.net/article/spp-media-p1/0dd705f32f9e4895810d291c76de5ea2/1661e4ee07f342dcb168fed3ab81e78e.jpg?imwidth=300&filter=packshot",
      "CATEGORY": "Lower Body",
      "SPLIT": "val_gallery"
      [...]
  }
  ...
  

• Test data should be stored as TEST/dist_{i}.parquet and TEST/prods.parquet files. Their index should be url, and have a single jpg column containing the images as bytes.

Use the following commands to train a model and evaluate it. Additional options can be found in the scripts. Training a ViT-B/32 on 2 Nvidia V100 GPUs should take ~6h.

python main.py --architecture B32 --batch_size 180 --conditioning --run_name CondViTB32
python lrvsf/test/embedding.py --save_path ./saves/CondViTB32_*/best_validation_model.pth
python lrvsf/test/metrics.py --embeddings_folder ./saves/CondViTB32_*/embs/

To cite our work, please use the following BibTeX entry :

@article{lepage2023lrvsf,
  title={LRVS-Fashion: Extending Visual Search with Referring Instructions},
  author={Lepage, Simon and Mary, Jérémie and Picard, David},
  journal={arXiv:2306.02928},
  year={2023}
}