## Perturbed-Attention Guidance

This repository is based on [Diffusers](https://huggingface.co/docs/diffusers/index). StableDiffusionPAGPipeline is a modification of StableDiffusionPipeline to support Perturbed-Attention Guidance (PAG).

## Quickstart

Load StableDiffusionPAGPipeline as below:

```
pipe = StableDiffusionPipeline.from_pretrained(
    "runwayml/stable-diffusion-v1-5",
    custom_pipeline="hyoungwoncho/sd_perturbed_attention_guidance",
    torch_dtype=torch.float16,
    safety_checker=None
)
```

Sampling:

```
output_baseline = pipe(
        prompts,
        width=512,
        height=512,
        num_inference_steps=50,
        guidance_scale=0.0,
        pag_scale=4.5,
        pag_applied_layers_index=pag_applied_layers_index
    ).images
```

Parameters:

pag_scale : gudiance scale of PAG (ex: 4.5)
pag_applied_layers_index = index of the layer to apply perturbation (ex: ['m0'])