Create README.md

README.md

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+---
+license: mit
+language:
+- en
+- fr
+tags:
+- vidore
+---
+# ColPali: Visual Retriever based on PaliGemma-3B with ColBERT strategy
+### Idefics2 version
+
+ColIdefics is a model based on a novel model architecture and training strategy based on Vision Language Models (VLMs) to efficiently index documents from their visual features.
+It is a Idefics2 extension that generates [ColBERT](https://arxiv.org/abs/2004.12832)- style multi-vector representations of text and images. 
+It was introduced in the paper [ColPali: Efficient Document Retrieval with Vision Language Models](https://arxiv.org/abs/2407.01449) and first released in [this repository](https://github.com/ManuelFay/colpali)
+
+## Model Description
+
+This model is built iteratively starting from an off-the-shelf [SigLIP](https://huggingface.co/google/siglip-so400m-patch14-384) model. 
+We finetuned it to create [BiSigLIP](https://huggingface.co/vidore/bisiglip) and fed the patch-embeddings output by SigLIP to an LLM, [PaliGemma-3B](https://huggingface.co/google/paligemma-3b-mix-448) to create [BiPali](https://huggingface.co/vidore/bipali). 
+
+One benefit of inputting image patch embeddings through a language model is that they are natively mapped to a latent space similar to textual input (query). 
+This enables leveraging the [ColBERT](https://arxiv.org/abs/2004.12832) strategy to compute interactions between text tokens and image patches, which enables a step-change improvement in performance compared to BiPali. 
+
+## Model Training
+
+### Dataset
+Our training dataset of 127,460 query-page pairs is comprised of train sets of openly available academic datasets (63%) and a synthetic dataset made up of pages from web-crawled PDF documents and augmented with VLM-generated (Claude-3 Sonnet) pseudo-questions (37%). 
+Our training set is fully English by design, enabling us to study zero-shot generalization to non-English languages. We explicitly verify no multi-page PDF document is used both [*ViDoRe*](https://huggingface.co/collections/vidore/vidore-benchmark-667173f98e70a1c0fa4db00d) and in the train set to prevent evaluation contamination. 
+A validation set is created with 2% of the samples to tune hyperparameters.
+
+*Note: Multilingual data is present in the pretraining corpus of the language model (Gemma-2B) and potentially occurs during PaliGemma-3B's multimodal training.*
+
+### Parameters
+
+All models are trained for 1 epoch on the train set. Unless specified otherwise, we train models in `bfloat16` format, use low-rank adapters ([LoRA](https://arxiv.org/abs/2106.09685)) 
+with `alpha=32`  and `r=32` on the transformer layers from the language model, 
+as well as the final randomly initialized projection layer, and use a `paged_adamw_8bit` optimizer. 
+We train on an 8 GPU setup with data parallelism, a learning rate of 5e-5 with linear decay with 2.5% warmup steps, and a batch size of 32.
+
+## Usage
+
+```python
+import torch
+import typer
+from torch.utils.data import DataLoader
+from tqdm import tqdm
+from transformers import AutoProcessor
+from PIL import Image
+
+from colpali_engine.models.paligemma_colbert_architecture import ColPali
+from colpali_engine.trainer.retrieval_evaluator import CustomEvaluator
+from colpali_engine.utils.colpali_processing_utils import process_images, process_queries
+from colpali_engine.utils.image_from_page_utils import load_from_dataset
+
+
+def main() -> None:
+    """Example script to run inference with ColPali"""
+
+    # Load model
+    model_name = "vidore/colpali"
+    model = ColPali.from_pretrained("google/paligemma-3b-mix-448", torch_dtype=torch.bfloat16, device_map="cuda").eval()
+    model.load_adapter(model_name)
+    processor = AutoProcessor.from_pretrained(model_name)
+
+    # select images -> load_from_pdf(<pdf_path>),  load_from_image_urls(["<url_1>"]), load_from_dataset(<path>)
+    images = load_from_dataset("vidore/docvqa_test_subsampled")
+    queries = ["From which university does James V. Fiorca come ?", "Who is the japanese prime minister?"]
+
+    # run inference - docs
+    dataloader = DataLoader(
+        images,
+        batch_size=4,
+        shuffle=False,
+        collate_fn=lambda x: process_images(processor, x),
+    )
+    ds = []
+    for batch_doc in tqdm(dataloader):
+        with torch.no_grad():
+            batch_doc = {k: v.to(model.device) for k, v in batch_doc.items()}
+            embeddings_doc = model(**batch_doc)
+        ds.extend(list(torch.unbind(embeddings_doc.to("cpu"))))
+
+    # run inference - queries
+    dataloader = DataLoader(
+        queries,
+        batch_size=4,
+        shuffle=False,
+        collate_fn=lambda x: process_queries(processor, x, Image.new("RGB", (448, 448), (255, 255, 255))),
+    )
+
+    qs = []
+    for batch_query in dataloader:
+        with torch.no_grad():
+            batch_query = {k: v.to(model.device) for k, v in batch_query.items()}
+            embeddings_query = model(**batch_query)
+        qs.extend(list(torch.unbind(embeddings_query.to("cpu"))))
+
+    # run evaluation
+    retriever_evaluator = CustomEvaluator(is_multi_vector=True)
+    scores = retriever_evaluator.evaluate(qs, ds)
+    print(scores.argmax(axis=1))
+
+
+if __name__ == "__main__":
+    typer.run(main)
+
+```
+
+## Limitations
+
+ - **Focus**: The model primarily focuses on PDF-type documents and high-ressources languages, potentially limiting its generalization to other document types or less represented languages.
+ - **Support**: The model relies on multi-vector retreiving derived from the ColBERT late interaction mechanism, which may require engineering efforts to adapt to widely used vector retrieval frameworks that lack native multi-vector support.
+
+## License
+
+The base model behing ColIdefics (Idefics2) is under MIT license. The adapters attached to the model are under MIT license.
+
+## Contact
+
+- Manuel Faysse: manuel.faysse@illuin.tech
+- Hugues Sibille: hugues.sibille@illuin.tech
+- Tony Wu: tony.wu@illuin.tech
+
+## Citation
+
+If you use any datasets or models from this organization in your research, please cite the original dataset as follows:
+
+```bibtex
+    @misc{faysse2024colpaliefficientdocumentretrieval,
+      title={ColPali: Efficient Document Retrieval with Vision Language Models}, 
+      author={Manuel Faysse and Hugues Sibille and Tony Wu and Bilel Omrani and Gautier Viaud and Céline Hudelot and Pierre Colombo},
+      year={2024},
+      eprint={2407.01449},
+      archivePrefix={arXiv},
+      primaryClass={cs.IR},
+      url={https://arxiv.org/abs/2407.01449}, 
+}
+```