Stable Diffusion is a text-to-image latent diffusion model created by the researchers and engineers from CompVis, Stability AI and LAION. It's trained on 512x512 images from a subset of the LAION-5B dataset. This model uses a frozen CLIP ViT-L/14 text encoder to condition the model on text prompts. With its 860M UNet and 123M text encoder, the model is relatively lightweight and can run on consumer GPUs.

Latent diffusion is the research on top of which Stable Diffusion was built. It was proposed in High-Resolution Image Synthesis with Latent Diffusion Models by Robin Rombach, Andreas Blattmann, Dominik Lorenz, Patrick Esser, Björn Ommer. You can learn more details about it in the specific pipeline for latent diffusion that is part of 🤗 Diffusers.

For more details about how Stable Diffusion works and how it differs from the base latent diffusion model, please refer to the official launch announcement post and this section of our own blog post.

Tips:

• To tweak your prompts on a specific result you liked, you can generate your own latents, as demonstrated in the following notebook:

Overview:

Pipeline	Tasks	Colab	Demo
pipeline_stable_diffusion.py	Text-to-Image Generation		🤗 Stable Diffusion
pipeline_stable_diffusion_img2img.py	Image-to-Image Text-Guided Generation		🤗 Diffuse the Rest
pipeline_stable_diffusion_inpaint.py	Experimental – Text-Guided Image Inpainting		Coming soon

The stable diffusion pipeline uses [PNDMScheduler] scheduler by default. But diffusers provides many other schedulers that can be used with the stable diffusion pipeline such as [DDIMScheduler], [LMSDiscreteScheduler], [EulerDiscreteScheduler], [EulerAncestralDiscreteScheduler] etc. To use a different scheduler, you can either change it via the [ConfigMixin.from_config] method or pass the scheduler argument to the from_pretrained method of the pipeline. For example, to use the [EulerDiscreteScheduler], you can do the following:

>>> from diffusers import StableDiffusionPipeline, EulerDiscreteScheduler

>>> pipeline = StableDiffusionPipeline.from_pretrained("CompVis/stable-diffusion-v1-4")
>>> pipeline.scheduler = EulerDiscreteScheduler.from_config(pipeline.scheduler.config)

>>> # or
>>> euler_scheduler = EulerDiscreteScheduler.from_pretrained("CompVis/stable-diffusion-v1-4", subfolder="scheduler")
>>> pipeline = StableDiffusionPipeline.from_pretrained("CompVis/stable-diffusion-v1-4", scheduler=euler_scheduler)

If you want to use all possible use cases in a single DiffusionPipeline you can either:

• Make use of the Stable Diffusion Mega Pipeline or
• Make use of the components functionality to instantiate all components in the most memory-efficient way:

>>> from diffusers import (
...     StableDiffusionPipeline,
...     StableDiffusionImg2ImgPipeline,
...     StableDiffusionInpaintPipeline,
... )

>>> text2img = StableDiffusionPipeline.from_pretrained("CompVis/stable-diffusion-v1-4")
>>> img2img = StableDiffusionImg2ImgPipeline(**text2img.components)
>>> inpaint = StableDiffusionInpaintPipeline(**text2img.components)

>>> # now you can use text2img(...), img2img(...), inpaint(...) just like the call methods of each respective pipeline

[[autodoc]] pipelines.stable_diffusion.StableDiffusionPipelineOutput

[[autodoc]] StableDiffusionPipeline - call - enable_attention_slicing - disable_attention_slicing - enable_vae_slicing - disable_vae_slicing - enable_xformers_memory_efficient_attention - disable_xformers_memory_efficient_attention

[[autodoc]] StableDiffusionImg2ImgPipeline - call - enable_attention_slicing - disable_attention_slicing - enable_xformers_memory_efficient_attention - disable_xformers_memory_efficient_attention

[[autodoc]] StableDiffusionInpaintPipeline - call - enable_attention_slicing - disable_attention_slicing - enable_xformers_memory_efficient_attention - disable_xformers_memory_efficient_attention

[[autodoc]] StableDiffusionImageVariationPipeline - call - enable_attention_slicing - disable_attention_slicing - enable_xformers_memory_efficient_attention - disable_xformers_memory_efficient_attention

[[autodoc]] StableDiffusionUpscalePipeline - call - enable_attention_slicing - disable_attention_slicing - enable_xformers_memory_efficient_attention - disable_xformers_memory_efficient_attention