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README.md
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tags:
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- shap-e
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---
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license: mit
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tags:
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- image-to-image
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- text-to-3d
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- diffusers
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- shap-e
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---
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# Shap-E
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Shap-E introduces a diffusion process that can generate a 3D image from a text prompt. It was introduced in [Shap-E: Generating Conditional 3D Implicit Functions](https://arxiv.org/abs/2305.02463) by Heewoo Jun and Alex Nichol from OpenAI.
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Original repository of Shap-E can be found here: https://github.com/openai/shap-e.
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_The authors of Shap-E didn't author this model card. They provide a separate model card [here](https://github.com/openai/shap-e/blob/main/model-card.md)._
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## Introduction
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The abstract of the Shap-E paper:
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*We present Shap-E, a conditional generative model for 3D assets. Unlike recent work on 3D generative models which produce a single output representation, Shap-E directly generates the parameters of implicit functions that can be rendered as both textured meshes and neural radiance fields. We train Shap-E in two stages: first, we train an encoder that deterministically maps 3D assets into the parameters of an implicit function; second, we train a conditional diffusion model on outputs of the encoder. When trained on a large dataset of paired 3D and text data, our resulting models are capable of generating complex and diverse 3D assets in a matter of seconds. When compared to Point-E, an explicit generative model over point clouds, Shap-E converges faster and reaches comparable or better sample quality despite modeling a higher-dimensional, multi-representation output space. We release model weights, inference code, and samples at [this https URL](https://github.com/openai/shap-e).*
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## Released checkpoints
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The authors released the following checkpoints:
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* [openai/shap-e](https://hf.co/openai/shap-e): produces a 3D image from a text input prompt
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* [openai/shap-e-img2img](https://hf.co/openai/shap-e-img2img): samples a 3D image from synthetic 2D image
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## Usage examples in 🧨 diffusers
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First make sure you have installed all the dependencies:
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```bash
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pip install transformers accelerate -q
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pip install git+https://github.com/huggingface/diffusers@@shap-ee
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```
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Once the dependencies are installed, use the code below:
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```python
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import torch
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from diffusers import ShapEImg2ImgPipeline
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from diffusers.utils import export_to_gif, load_image
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ckpt_id = "openai/shap-e-img2img"
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pipe = ShapEImg2ImgPipeline.from_pretrained(repo).to("cuda")
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img_url = "https://hf.co/datasets/diffusers/docs-images/resolve/main/shap-e/corgi.png"
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image = load_image(img_url)
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generator = torch.Generator(device="cuda").manual_seed(0)
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batch_size = 4
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guidance_scale = 3.0
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images = pipe(
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image,
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num_images_per_prompt=batch_size,
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generator=generator,
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guidance_scale=guidance_scale,
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num_inference_steps=64,
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size=256,
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output_type="pil"
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).images
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gif_path = export_to_gif(images, "corgi_sampled_3d.gif")
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```
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## Results
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<table>
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<tbody>
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<tr>
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<td align="center">
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<img src="https://huggingface.co/datasets/diffusers/docs-images/resolve/main/shap-e/corgi.png" alt="Reference corgi image in 2D">
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</td>
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<td align="center">
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<img src="https://huggingface.co/datasets/diffusers/docs-images/resolve/main/shap-e/corgi_sampled_3d.gif" alt="Sampled image in 3D (one)">
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</td align="center">
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<td align="center">
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<img src="https://huggingface.co/datasets/diffusers/docs-images/resolve/main/shap-e/corgi_sampled_3d_two.gif" alt="Sampled image in 3D (two)">
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</td>
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</tr>
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<tr>
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<td align="center">Reference corgi image in 2D</td>
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<td align="center">Sampled image in 3D (one)</td>
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<td align="center">Sampled image in 3D (two)</td>
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</tr>
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</tr>
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</tbody>
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<table>
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## Training details
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Refer to the [original paper](https://arxiv.org/abs/2305.02463).
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## Known limitations and potential biases
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Refer to the [original model card](https://github.com/openai/shap-e/blob/main/model-card.md).
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## Citation
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```bibtex
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@misc{jun2023shape,
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title={Shap-E: Generating Conditional 3D Implicit Functions},
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author={Heewoo Jun and Alex Nichol},
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year={2023},
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eprint={2305.02463},
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archivePrefix={arXiv},
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primaryClass={cs.CV}
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}
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```
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