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CVPR 2022 [[Paper]](https://bit.ly/3b1ABEb)

[![Denoising_Diffusion_Inpainting_Animation](https://user-images.githubusercontent.com/11280511/150849757-5cd762cb-07a3-46aa-a906-0fe4606eba3b.gif)]()
[![Denoising_Diffusion_Inpainting_Animation](https://user-images.githubusercontent.com/11280511/150849757-5cd762cb-07a3-46aa-a906-0fe4606eba3b.gif)](#)

## Setup

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# RePaint conditions the diffusion model on the known part

- RePaint uses Denoising Diffusion Probabilistic Models.
- We condition this process on the given image content.
- RePaint uses a unconditionally trained Denoising Diffusion Probabilistic Models.
- We condition during inference on the given image content.

![Denoising_Diffusion_Probabilistic_Models_Inpainting_Method](https://user-images.githubusercontent.com/11280511/150822344-8e71070b-936d-4c5b-9298-ac29af266990.png)
![Denoising Diffusion Probabilistic Models Inpainting Method](https://user-images.githubusercontent.com/11280511/180631151-59b6674b-bf2c-4501-8307-03c9f5f593ae.gif)

**Intuition of one denoising step:**
**Intuition of one conditoned denoising step:**
1) **Sample the known part:** Add gaussian noise to the known regions of the image. <br> We obtain a noisy image that follows the denoising process exactly.
2) **Denoise one step:** Denoise the previous image for one step. This generates <br> content for the unknown region conditioned on the known region.
3) **Join:** Merge the images from both steps.

Details are in Algorithm 1 on Page 4. [[Paper]](https://bit.ly/3b1ABEb)
Details are in Algorithm 1 on Page 5. [[Paper]](https://bit.ly/3b1ABEb)


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