lu-wo/fabric

FABRIC: Personalizing Diffusion Models with Iterative Feedback

FABRIC (Feedback via Attention-Based Reference Image Conditioning) is a technique to incorporate iterative feedback into the generative process of diffusion models based on StableDiffusion. This is done by exploiting the self-attention mechanism in the U-Net in order to condition the diffusion process on a set of positive and negative reference images that are to be chosen based on human feedback.

Setup

• Option 1: Install the repository as a pip-package (does not install dependencies, check requirements.txt for required dependencies):

pip install git+https://github.com/sd-fabric/fabric.git

• Option 2: Clone the repository, create virtual environment and install the required packages as follows:

python3 -m venv .venv  # create new virtual environment
source .venv/bin/activate  # activate it
pip install -r requirements.txt  # install requirements
pip install -e .  # install current repository in editable mode

Usage

The fabric/single_round.py script can be used to run a single round of (optionally) feedback-conditioned generation as follows:

# 1st round (text-to-image w/o feedback)
python fabric/single_round.py prompt="photo of a dog running on grassland, masterpiece, best quality, fine details"
# 2nd round (text-to-image w/ feedback)
python fabric/run_single.py \
    prompt="photo of a dog running on grassland, masterpiece, best quality, fine details" \
    liked="[outputs/images/2023-07-06/example_1_1.png]" \
    disliked="[outputs/images/2023-07-06/example_1_3.png]"

Alternatively, the FABRIC generators can be used to incorporate iterative feedback in the generation process as follows:

from PIL import Image

from fabric.generator import AttentionBasedGenerator
from fabric.iterative import IterativeFeedbackGenerator

def get_feedback(images) -> tuple[list[Image.Image], list[Image.Image]]:
    raise NotImplementedError("TODO: Implement your own function to select positive and negative feedback")

base_generator = AttentionBasedGenerator("dreamlike-art/dreamlike-photoreal-2.0", torch_dtype=torch.float16)
base_generator.to("cuda")

generator = IterativeFeedbackGenerator(base_generator)

prompt = "photo of a dog running on grassland, masterpiece, best quality, fine details"
negative_prompt = "lowres, bad anatomy, bad hands, cropped, worst quality"

for _ in range(4):
    images: list[Image.Image] = generator.generate(prompt, negative_prompt=negative_prompt)
    liked, disliked = get_feedback(images)
    generator.give_feedback(liked, disliked)
generator.reset()

Evaluation

To replicate the evaluation results, the provided evaluation scripts can be used as follows:

# Experiment 1: Preference model-based feedback selection
python fabric/evaluation/preference_model_feedback.py
# Experiment 2: Target image-based feedback selection
python fabric/evaluation/target_image_feedback.py

To evaluate using the HPS LoRA, download it from the official repository (e.g. to resources/hps_lora/adapted_model.bin) and pass it to the evaluation scripts as follows:

python fabric/evaluation/target_image_feedback.py lora_weights="resources/hps_lora/adapted_model.bin"