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README.md
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datasets:
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- ChristophSchuhmann/MS_COCO_2017_URL_TEXT
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---
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<h1 align="center">UForm</h1>
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<h3 align="center">
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For
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</h3>
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---
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If you need Multilingual model, check [this](https://huggingface.co/unum-cloud/uform-vl-multilingual).
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## Evaluation
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| Dataset | Recall@1 | Recall@5 | Recall@10 |
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| :-------- | ------: | --------: | --------: |
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| Zero-Shot Flickr | 0.727 | 0.915 | 0.949 |
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| MS-COCO
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## Installation
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```bash
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pip install uform[torch]
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```
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## Usage
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To load the model:
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```python
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import
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model, processor = uform.get_model('unum-cloud/uform-vl-english')
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```
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```python
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from PIL import Image
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image_data = processor.preprocess_image(image)
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text_data = processor.preprocess_text(text)
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image_features, image_embedding = model.encode_image(image_data, return_features=True)
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text_features, text_embedding = model.encode_text(text_data, return_features=True)
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```
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To get features:
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```python
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image_features, image_embedding = model.encode_image(image_data, return_features=True)
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text_features, text_embedding = model.encode_text(text_data, return_features=True)
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```
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These features can later be used to produce joint multimodal encodings faster, as the first layers of the transformer can be skipped:
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```python
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joint_embedding = model.encode_multimodal(
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image_features=image_features,
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text_features=text_features,
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attention_mask=text_data['attention_mask']
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)
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```
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There are two options to calculate semantic compatibility between an image and a text: [Cosine Similarity](#cosine-similarity) and [Matching Score](#matching-score).
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### Cosine Similarity
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```python
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import torch.nn.functional as F
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```
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__Pros__:
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- Computationally cheap.
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- Only unimodal embeddings are required, unimodal encoding is faster than joint encoding.
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- Suitable for retrieval in large collections.
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__Cons__:
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- Takes into account only coarse-grained features.
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### Matching Score
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Unlike cosine similarity, unimodal embedding are not enough.
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Joint embedding will be needed and the resulting `score` will belong to the `[0, 1]` range, `1` meaning the absolute match.
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```python
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```
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__Pros__:
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- Joint embedding captures fine-grained features.
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- Suitable for re-ranking – sorting retrieval result.
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__Cons__:
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- Resource-intensive.
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- Not suitable for retrieval in large collections.
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- clip
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- vision
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datasets:
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- Ziyang/yfcc15m
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- conceptual_captions
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---
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<h1 align="center">UForm</h1>
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<h3 align="center">
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Pocket-Sized Multimodal AI<br/>
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For Content Understanding and Generation<br/>
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In Python, JavaScript, and Swift<br/>
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</h3>
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---
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The `uform3-image-text-english-base` UForm model is a tiny vision and English language encoder, mapping them into a shared vector space.
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This model produces up to __256-dimensional embeddings__ and is made of:
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* Text encoder: 4-layer BERT for up to 64 input tokens.
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* Visual encoder: ViT-B/16 for images of 224 x 224 resolution.
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Unlike most CLIP-like multomodal models, this model shares 2 layers between the text and visual encoder to allow for more data- and parameter-efficient training.
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Also unlike most models, UForm provides checkpoints compatible with PyTorch, ONNX, and CoreML, covering the absolute majority of AI-capable devices, with pre-quantized weights and inference code.
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If you need a larger, more accurate, or multilingual model, check our [HuggingFace Hub](https://huggingface.co/unum-cloud/).
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For more details on running the model, check out the [UForm GitHub repository](https://github.com/unum-cloud/uform/).
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## Evaluation
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For zero-shot ImageNet classification the model achieves Top-1 accuracy of 36.1% and Top-5 of 60.8%.
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On text-to-image retrieval it reaches 86% Recall@10 for Flickr:
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| Dataset | Recall@1 | Recall@5 | Recall@10 |
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| :-------- | ------: | --------: | --------: |
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| Zero-Shot Flickr | 0.727 | 0.915 | 0.949 |
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| MS-COCO ¹ | 0.510 | 0.761 | 0.838 |
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> ¹ It's important to note, that the MS-COCO train split was present in the training data.
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## Installation
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```bash
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pip install "uform[torch,onnx]"
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```
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## Usage
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To load the model:
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```python
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from uform import get_model, Modality
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import requests
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from io import BytesIO
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from PIL import Image
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model_name = 'unum-cloud/uform3-image-text-english-base'
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modalities = [Modality.TEXT_ENCODER, Modality.IMAGE_ENCODER]
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processors, models = get_model(model_name, modalities=modalities)
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model_text = models[Modality.TEXT_ENCODER]
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model_image = models[Modality.IMAGE_ENCODER]
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processor_text = processors[Modality.TEXT_ENCODER]
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processor_image = processors[Modality.IMAGE_ENCODER]
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```
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To encode the content:
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```python
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text = 'a cityscape bathed in the warm glow of the sun, with varied architecture and a towering, snow-capped mountain rising majestically in the background'
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image_url = 'https://media-cdn.tripadvisor.com/media/photo-s/1b/28/6b/53/lovely-armenia.jpg'
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image_url = Image.open(BytesIO(requests.get(image_url).content))
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image_data = processor_image(image)
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text_data = processor_text(text)
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image_features, image_embedding = model_image.encode(image_data, return_features=True)
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text_features, text_embedding = model_text.encode(text_data, return_features=True)
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```
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