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139
docs/source/en/model_doc/ijepa.md
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docs/source/en/model_doc/ijepa.md
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<!--Copyright 2025 The HuggingFace Team. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
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the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
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an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
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specific language governing permissions and limitations under the License.
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⚠️ Note that this file is in Markdown but contain specific syntax for our doc-builder (similar to MDX) that may not be
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rendered properly in your Markdown viewer.
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-->
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*This model was published in HF papers on 2023-01-19 and contributed to Hugging Face Transformers on 2024-12-05.*
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<div style="float: right;">
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<div class="flex flex-wrap space-x-1">
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<img alt="FlashAttention" src="https://img.shields.io/badge/%E2%9A%A1%EF%B8%8E%20FlashAttention-eae0c8?style=flat">
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<img alt="SDPA" src="https://img.shields.io/badge/SDPA-DE3412?style=flat&logo=pytorch&logoColor=white">
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</div>
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</div>
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# I-JEPA
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[I-JEPA](https://huggingface.co/papers/2301.08243) is a self-supervised learning method that learns semantic image representations by predicting parts of an image from other parts of the image. It compares the abstract representations of the image (rather than pixel level comparisons), which avoids the typical pitfalls of data augmentation bias and pixel-level details that don't capture semantic meaning.
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You can find the original I-JEPA checkpoints under the [AI at Meta](https://huggingface.co/facebook/models?search=ijepa) organization.
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> [!TIP]
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> This model was contributed by [jmtzt](https://huggingface.co/jmtzt).
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<img src="https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/model_doc/ijepa_architecture.jpg">
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> Click on the I-JEPA models in the right sidebar for more examples of how to apply I-JEPA to different image representation and classification tasks.
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The example below demonstrates how to extract image features with [`Pipeline`] or the [`AutoModel`] class.
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<hfoptions id="usage">
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<hfoption id="Pipeline">
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```python
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from transformers import pipeline
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feature_extractor = pipeline(
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task="image-feature-extraction",
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model="facebook/ijepa_vith14_1k",
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device=0,
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)
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features = feature_extractor("https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/pipeline-cat-chonk.jpeg", return_tensors=True).to(model.device)
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print(f"Feature shape: {features.shape}")
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```
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</hfoption>
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<hfoption id="AutoModel">
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```python
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import requests
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from PIL import Image
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from torch.nn.functional import cosine_similarity
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from transformers import AutoModel, AutoProcessor
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url_1 = "http://images.cocodataset.org/val2017/000000039769.jpg"
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url_2 = "http://images.cocodataset.org/val2017/000000219578.jpg"
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image_1 = Image.open(requests.get(url_1, stream=True).raw)
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image_2 = Image.open(requests.get(url_2, stream=True).raw)
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processor = AutoProcessor.from_pretrained("facebook/ijepa_vith14_1k")
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model = AutoModel.from_pretrained("facebook/ijepa_vith14_1k", attn_implementation="sdpa", device_map="auto")
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def infer(image):
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inputs = processor(image, return_tensors="pt").to(model.device)
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outputs = model(**inputs)
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return outputs.last_hidden_state.mean(dim=1)
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embed_1 = infer(image_1)
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embed_2 = infer(image_2)
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similarity = cosine_similarity(embed_1, embed_2)
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print(similarity)
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```
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</hfoption>
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</hfoptions>
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Quantization reduces the memory burden of large models by representing the weights in a lower precision. Refer to the [Quantization](../quantization/overview) overview for more available quantization backends.
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The example below uses [bitsandbytes](../quantization/bitsandbytes) to only quantize the weights to 4-bits.
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```python
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from transformers import AutoModel, AutoProcessor, BitsAndBytesConfig
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quantization_config = BitsAndBytesConfig(
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load_in_4bit=True,
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bnb_4bit_quant_type="nf4",
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bit_use_double_quant=True,
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)
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url_1 = "http://images.cocodataset.org/val2017/000000039769.jpg"
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url_2 = "http://images.cocodataset.org/val2017/000000219578.jpg"
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image_1 = Image.open(requests.get(url_1, stream=True).raw)
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image_2 = Image.open(requests.get(url_2, stream=True).raw)
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processor = AutoProcessor.from_pretrained("facebook/ijepa_vitg16_22k")
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model = AutoModel.from_pretrained("facebook/ijepa_vitg16_22k", quantization_config=quantization_config, attn_implementation="sdpa", device_map="auto")
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def infer(image):
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inputs = processor(image, return_tensors="pt").to(model.device)
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outputs = model(**inputs)
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return outputs.last_hidden_state.mean(dim=1)
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embed_1 = infer(image_1)
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embed_2 = infer(image_2)
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similarity = cosine_similarity(embed_1, embed_2)
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print(similarity)
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```
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## IJepaConfig
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[[autodoc]] IJepaConfig
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## IJepaModel
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[[autodoc]] IJepaModel
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- forward
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## IJepaForImageClassification
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[[autodoc]] IJepaForImageClassification
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- forward
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