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Using Stable Diffusion with Python

Using Stable Diffusion with Python

By : Andrew Zhu (Shudong Zhu)
4.8 (5)
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Using Stable Diffusion with Python

Using Stable Diffusion with Python

4.8 (5)
By: Andrew Zhu (Shudong Zhu)

Overview of this book

Stable Diffusion is a game-changing AI tool that enables you to create stunning images with code. The author, a seasoned Microsoft applied data scientist and contributor to the Hugging Face Diffusers library, leverages his 15+ years of experience to help you master Stable Diffusion by understanding the underlying concepts and techniques. You’ll be introduced to Stable Diffusion, grasp the theory behind diffusion models, set up your environment, and generate your first image using diffusers. You'll optimize performance, leverage custom models, and integrate community-shared resources like LoRAs, textual inversion, and ControlNet to enhance your creations. Covering techniques such as face restoration, image upscaling, and image restoration, you’ll focus on unlocking prompt limitations, scheduled prompt parsing, and weighted prompts to create a fully customized and industry-level Stable Diffusion app. This book also looks into real-world applications in medical imaging, remote sensing, and photo enhancement. Finally, you'll gain insights into extracting generation data, ensuring data persistence, and leveraging AI models like BLIP for image description extraction. By the end of this book, you'll be able to use Python to generate and edit images and leverage solutions to build Stable Diffusion apps for your business and users.
Table of Contents (29 chapters)
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Free Chapter
1
Part 1 – A Whirlwind of Stable Diffusion
8
Part 2 – Improving Diffusers with Custom Features
15
Part 3 – Advanced Topics
21
Part 4 – Building Stable Diffusion into an Application

Optimization solution 4 – enabling sequential CPU offload

As we discussed in Chapter 5, one pipeline includes several sub-models:

  • Text embedding model used to encode text to embeddings
  • Image latent encoder/decoder used to encode the input guidance image and decode latent space to pixel images
  • The UNet will loop the inference denoising steps
  • The safety checker model checks the safety of the generated content

The idea of sequential CPU offload is offloading idle submodels to CPU RAM when it finishes its task and is idle.

Here is an example of how it works step by step:

  1. Load the CLIP text model to the GPU VRAM and encode the input prompt to embeddings.
  2. Offload the CLIP text model to CPU RAM.
  3. Load the VAE model (the image to latent space encoder and decoder) to the GPU VRAM and encode the start image if the current task is an image-to-image pipeline.
  4. Offload the VAE to the CPU RAM.
  5. Load UNet to loop through the denoising steps...

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