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README.md
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---
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library_name: diffusers
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base_model: stabilityai/stable-diffusion-xl-base-1.0
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tags:
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- text-to-image
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license: openrail++
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inference: false
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---
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# One More Step
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One More Step (OMS) module was proposed in [One More Step: A Versatile Plug-and-Play Module for Rectifying Diffusion Schedule Flaws and Enhancing Low-Frequency Controls](https://github.com/mhh0318/OneMoreStep)
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by *Minghui Hu, Jianbin Zheng, Chuanxia Zheng, Tat-Jen Cham et al.*
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By **adding one small step** on the top the sampling process, we can address the issues caused by the current schedule flaws of diffusion models **without changing the original model parameters**. This also allows for some control over low-frequency information, such as color.
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Our model is **versatile** and can be integrated into almost all widely-used Stable Diffusion frameworks. It's compatible with community favorites such as **LoRA, ControlNet, Adapter, and foundational models**.
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## Usage
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OMS now is supported 🤗 `diffusers` with a customized pipeline [github](https://github.com/mhh0318/OneMoreStep). To run the model (especially with `LCM` variant), first install the latest version of `diffusers` library as well as `accelerate` and `transformers`.
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```bash
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pip install --upgrade pip
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pip install --upgrade diffusers transformers accelerate
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```
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And then we clone the repo
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```bash
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git clone https://github.com/mhh0318/OneMoreStep.git
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cd OneMoreStep
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```
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### SD15 and SD21
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Due to differences in the *VAE latent space* between SD1.5/SD2.1 and SDXL, the OMS module for SD1.5/SD2.1 cannot be shared with SDXL, **however, SD1.5/SD2.1 can share the same OMS module as well as with models like LCM that are based on SD1.5 or SD2.1.** For more details, please refer to our paper.
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We have uploaded one OMS module for SD15/21 series at [h1t/oms_b_openclip_15_21](https://huggingface.co/h1t/oms_b_openclip_15_21), which has a base architecture, an OpenCLIP text encoder.
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We simply put a demo here:
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```python
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import torch
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from diffusers import StableDiffusionPipeline, LCMScheduler
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sd_pipe = StableDiffusionPipeline.from_pretrained("stabilityai/stable-diffusion-2-1", torch_dtype=torch.float16, variant="fp16", safety_checker=None).to('cuda')
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pipe = OMSPipeline.from_pretrained('h1t/oms_b_openclip_15_21', sd_pipeline = sd_pipe, torch_dtype=torch.float16, variant="fp16", trust_remote_code=True)
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pipe.to('cuda')
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generator = torch.Generator(device=pipe.device).manual_seed(100)
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prompt = "a starry night"
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image = pipe(prompt, guidance_scale=7.5, num_inference_steps=20, oms_guidance_scale=2., generator=generator)
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image['images'][0]
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```
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![oms_15](sd15_oms.png)
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and without OMS:
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```python
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image = pipe(prompt, guidance_scale=7.5, num_inference_steps=20, oms_guidance_scale=2., generator=generator, oms_flag=False)
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image['images'][0]
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```
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![oms_15](sd15_wo_oms.png)
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We found that the quality of the generative model has been greatly improved.
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For more models and more functions like diverse prompt, please refer to [OMS Repo](https://github.com/mhh0318/OneMoreStep).
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