metadata

license:
  - apache-2.0
language:
  - en
tags:
  - Diffusion Models
  - Stable Diffusion XL
  - Perturbed-Attention Guidance
  - PAG

Perturbed-Attention Guidance for SDXL (i2i)

The original Perturbed-Attention Guidance for unconditional models and SD1.5 by Hyoungwon Cho is availiable at hyoungwoncho/sd_perturbed_attention_guidance

Project / arXiv / GitHub

Also there is an extra implementation of the Perturbed-Attention Guidance (PAG) on Stable Diffusion XL (SDXL) for the 🧨 diffusers library by multimodalart code / demo

This repository is just a simple implementation of the Perturbed-Attention Guidance (PAG) on Stable Diffusion XL (SDXL) for the 🧨 diffusers library to "image-to-image".

Quickstart

Loading Custom Pipeline:

from diffusers import StableDiffusionXLImg2ImgPipeline
pipe = StableDiffusionXLImg2ImgPipeline.from_pretrained(
    "stabilityai/stable-diffusion-xl-base-1.0",
    custom_pipeline="jyoung105/sdxl_perturbed_attention_guidance_i2i",
    torch_dtype=torch.float16
)
device="cuda"
pipe = pipe.to(device)

Unconditional sampling with PAG: ![image](example 1.png)

output = pipe(
        "",
        image=init_image,
        strength=0.6,
        num_inference_steps=40,
        guidance_scale=0.0,
        pag_scale=4.0,
        pag_applied_layers=['mid']
    ).images

Sampling with PAG and CFG: ![image](example 2.png)

output = pipe(
        "A man with hoodie on is looking at sky, photo",
        image=init_image,
        strength=0.6,
        num_inference_steps=40,
        guidance_scale=4.0,
        pag_scale=3.0,
        pag_applied_layers=['mid']
    ).images

Parameters

guidance_scale : guidance scale of CFG (ex: 7.5)

pag_scale : guidance scale of PAG (ex: 4.0)

pag_applied_layers: layer to apply perturbation (ex: ['mid'])

pag_applied_layers_index : index of the layers to apply perturbation (ex: ['m0', 'm1'])