pypi diffusers 0.17.0
v0.17.0 Improved LoRA, Kandinsky 2.1, Torch Compile Speed-up & More
on Python PyPI

latest releases: 0.31.0, 0.30.3, 0.30.2...
17 months ago

Kandinsky 2.1

Kandinsky 2.1 inherits best practices from DALL-E 2 and Latent Diffusion while introducing some new ideas.

Installation

pip install diffusers transformers accelerate

Code example

from diffusers import DiffusionPipeline
import torch

pipe_prior = DiffusionPipeline.from_pretrained("kandinsky-community/kandinsky-2-1-prior", torch_dtype=torch.float16)
pipe_prior.to("cuda")

t2i_pipe = DiffusionPipeline.from_pretrained("kandinsky-community/kandinsky-2-1", torch_dtype=torch.float16)
t2i_pipe.to("cuda")

prompt = "A alien cheeseburger creature eating itself, claymation, cinematic, moody lighting"
negative_prompt = "low quality, bad quality"

generator = torch.Generator(device="cuda").manual_seed(12)
image_embeds, negative_image_embeds = pipe_prior(prompt, negative_prompt, guidance_scale=1.0, generator=generator).to_tuple()

image = t2i_pipe(prompt, negative_prompt=negative_prompt, image_embeds=image_embeds, negative_image_embeds=negative_image_embeds).images[0]
image.save("cheeseburger_monster.png")

img

To learn more about the Kandinsky pipelines, and more details about speed and memory optimizations, please have a look at the docs.

Thanks @ayushtues, for helping with the integration of Kandinsky 2.1!

UniDiffuser

UniDiffuser introduces a multimodal diffusion process that is capable of handling different generation tasks using a single unified approach:

  • Unconditional image and text generation
  • Joint image-text generation
  • Text-to-image generation
  • Image-to-text generation
  • Image variation
  • Text variation

Below is an example of how to use UniDiffuser for text-to-image generation: 

import torch
from diffusers import UniDiffuserPipeline

model_id_or_path = "thu-ml/unidiffuser-v1"
pipe = UniDiffuserPipeline.from_pretrained(model_id_or_path, torch_dtype=torch.float16)
pipe.to("cuda")

# This mode can be inferred from the input provided to the `pipe`. 
pipe.set_text_to_image_mode()

prompt = "an elephant under the sea"
sample = pipe(prompt=prompt, num_inference_steps=20, guidance_scale=8.0).images[0]
sample.save("elephant.png")

Check out the UniDiffuser docs to know more.

UniDiffuser was added by @dg845 in this PR.

LoRA

We're happy to support the A1111 formatted CivitAI LoRA checkpoints in a limited capacity.

First, download a checkpoint. We’ll use this one for demonstration purposes. 

wget https://civitai.com/api/download/models/15603 -O light_and_shadow.safetensors

Next, we initialize a DiffusionPipeline: 

import torch

from diffusers import StableDiffusionPipeline, DPMSolverMultistepScheduler

pipeline = StableDiffusionPipeline.from_pretrained(
    "gsdf/Counterfeit-V2.5", torch_dtype=torch.float16, safety_checker=None
).to("cuda")
pipeline.scheduler = DPMSolverMultistepScheduler.from_config(
    pipeline.scheduler.config, use_karras_sigmas=True
)

We then load the checkpoint downloaded from CivitAI: 

pipeline.load_lora_weights(".", weight_name="light_and_shadow.safetensors")

(If you’re loading a checkpoint in the safetensors format, please ensure you have safetensors installed.)

And then it’s time for running inference: 

prompt = "masterpiece, best quality, 1girl, at dusk"
negative_prompt = ("(low quality, worst quality:1.4), (bad anatomy), (inaccurate limb:1.2), "
                   "bad composition, inaccurate eyes, extra digit, fewer digits, (extra arms:1.2), large breasts")

images = pipeline(prompt=prompt, 
    negative_prompt=negative_prompt, 
    width=512, 
    height=768, 
    num_inference_steps=15, 
    num_images_per_prompt=4,
    generator=torch.manual_seed(0)
).images

Below is a comparison between the LoRA and the non-LoRA results:

Check out the docs to learn more.

Thanks to @takuma104 for contributing this feature via this PR.

Torch 2.0 Compile Speed-up

We introduced Torch 2.0 support for computing attention efficiently in 0.13.0. Since then, we have made a number of improvements to ensure the number of "graph breaks" in our models is reduced so that the models can be compiled with torch.compile(). As a result, we are happy to report massive improvements in the inference speed of our most popular pipelines. Check out this doc to know more.

Thanks to @Chillee for helping us with this. Thanks to @patrickvonplaten for fixing the problems stemming from "graph breaks" in this PR.

VAE pre-processing

We added a Vae Image processor class that provides a unified API for pipelines to prepare their image inputs, as well as post-processing their outputs. It supports resizing, normalization, and conversion between PIL Image, PyTorch, and Numpy arrays.

With that, all Stable diffusion pipelines now accept image inputs in the format of Pytorch Tensor and Numpy array, in addition to PIL Image, and can produce outputs in these 3 formats. It will also accept and return latents. This means you can now take generated latents from one pipeline and pass them to another as inputs, without leaving the latent space. If you work with multiple pipelines, you can pass Pytorch Tensor between them without converting to PIL Image.

To learn more about the API, check out our doc here

ControlNet Img2Img & Inpainting

ControlNet is one of the most used diffusion models and upon strong demand from the community we added controlnet img2img and controlnet inpaint pipelines.
This allows to use any controlnet checkpoint for both image-2-image setting as well as for inpaint.

👉 Inpaint: See controlnet inpaint model here
👉 Image-to-Image: Any controlnet checkpoint can be used for image to image, e.g.: 

from diffusers import StableDiffusionControlNetImg2ImgPipeline, ControlNetModel, UniPCMultistepScheduler
from diffusers.utils import load_image
import numpy as np
import torch

import cv2
from PIL import Image

# download an image
image = load_image(
    "https://hf.co/datasets/huggingface/documentation-images/resolve/main/diffusers/input_image_vermeer.png"
)
np_image = np.array(image)

# get canny image
np_image = cv2.Canny(np_image, 100, 200)
np_image = np_image[:, :, None]
np_image = np.concatenate([np_image, np_image, np_image], axis=2)
canny_image = Image.fromarray(np_image)

# load control net and stable diffusion v1-5
controlnet = ControlNetModel.from_pretrained("lllyasviel/sd-controlnet-canny", torch_dtype=torch.float16)
pipe = StableDiffusionControlNetImg2ImgPipeline.from_pretrained(
    "runwayml/stable-diffusion-v1-5", controlnet=controlnet, torch_dtype=torch.float16
)

# speed up diffusion process with faster scheduler and memory optimization
pipe.scheduler = UniPCMultistepScheduler.from_config(pipe.scheduler.config)
pipe.enable_model_cpu_offload()

# generate image
generator = torch.manual_seed(0)
image = pipe(
    "futuristic-looking woman",
    num_inference_steps=20,
    generator=generator,
    image=image,
    control_image=canny_image,
).images[0]

Diffedit Zero-Shot Inpainting Pipeline

This pipeline (introduced in DiffEdit: Diffusion-based semantic image editing with mask guidance) allows for image editing with natural language. Below is an end-to-end example.

First, let’s load our pipeline: 

import torch
from diffusers import DDIMScheduler, DDIMInverseScheduler, StableDiffusionDiffEditPipeline

sd_model_ckpt = "stabilityai/stable-diffusion-2-1"
pipeline = StableDiffusionDiffEditPipeline.from_pretrained(
    sd_model_ckpt,
    torch_dtype=torch.float16,
    safety_checker=None,
)
pipeline.scheduler = DDIMScheduler.from_config(pipeline.scheduler.config)
pipeline.inverse_scheduler = DDIMInverseScheduler.from_config(pipeline.scheduler.config)
pipeline.enable_model_cpu_offload()
pipeline.enable_vae_slicing()
generator = torch.manual_seed(0)

Then, we load an input image to edit using our method: 

from diffusers.utils import load_image

img_url = "https://github.com/Xiang-cd/DiffEdit-stable-diffusion/raw/main/assets/origin.png"
raw_image = load_image(img_url).convert("RGB").resize((768, 768))

Then, we employ the source and target prompts to generate the editing mask: 

source_prompt = "a bowl of fruits"
target_prompt = "a basket of fruits"
mask_image = pipeline.generate_mask(
    image=raw_image,
    source_prompt=source_prompt,
    target_prompt=target_prompt,
    generator=generator,
)

Then, we employ the caption and the input image to get the inverted latents: 

inv_latents = pipeline.invert(prompt=source_prompt, image=raw_image, generator=generator).latents

Now, generate the image with the inverted latents and semantically generated mask: 

image = pipeline(
    prompt=target_prompt,
    mask_image=mask_image,
    image_latents=inv_latents,
    generator=generator,
    negative_prompt=source_prompt,
).images[0]
image.save("edited_image.png")

Check out the docs to learn more about this pipeline.

Thanks to @clarencechen for contributing this pipeline in this PR.

Docs

Apart from these, we have made multiple improvements to the overall quality-of-life of our docs.

Thanks to @stevhliu for leading the charge here.

Misc

  • xformers attention processor fix when using LoRA (PR by @takuma104)
  • Pytorch 2.0 SDPA implementation of the LoRA attention processor (PR)

All commits

Significant community contributions

The following contributors have made significant changes to the library over the last release:

  • @nipunjindal
    • [2064]: Add stochastic sampler (sample_dpmpp_sde) (#3020)
    • [Stochastic Sampler][Slow Test]: Cuda test fixes (#3257)
  • @clarencechen
    • Diffedit Zero-Shot Inpainting Pipeline (#2837)
    • [Scheduler] DPM-Solver (++) Inverse Scheduler (#3335)
  • @Markus-Pobitzer
    • Add Stable Diffusion RePaint to community pipelines (#3320)
  • @takuma104
    • Support ControlNet v1.1 shuffle properly (#3340)
    • Fix to apply LoRAXFormersAttnProcessor instead of LoRAAttnProcessor when xFormers is enabled (#3556)
    • Support Kohya-ss style LoRA file format (in a limited capacity) (#3437)
    • Add function to remove monkey-patch for text encoder LoRA (#3649)
  • @asfiyab-nvidia
    • add stable diffusion tensorrt img2img pipeline (#3419)
    • add Stable Diffusion TensorRT Inpainting pipeline (#3642)
  • @Snailpong
    • [Docs] Korean translation (optimization, training) (#3488)
  • @okotaku
    • [Community] reference only control (#3435)
    • [Community] ControlNet Reference (#3508)
    • [Community, Enhancement] Add reference tricks in README (#3589)
  • @Birch-san
    • Support for cross-attention bias / mask (#2634)
  • @yingjie-han
    • [Community Pipelines]Accelerate inference of stable diffusion by IPEX on CPU (#3105)
  • @dg845
    • [WIP] Add UniDiffuser model and pipeline (#2963)
  • @kadirnar
    • [docs] update the broken links (#3577)
    • [Community] Support StableDiffusionTilingPipeline (#3586)
    • [Community Doc] Updated the filename and readme file. (#3634)
  • @TheDenk
    • [Community] CLIP Guided Images Mixing with Stable DIffusion Pipeline (#3587)
  • @prathikr
    • update code to reflect latest changes as of May 30th (#3616)
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