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K-LoRA

Official implementation of K-LoRA: Unlocking Training-Free Fusion of Any Subject and Style LoRAs.

🔥 Examples

Below are the results of K-LoRA. The rows correspond to the respective style references, the columns correspond to the respective object references, and each cell represents the output obtained using a specific randomly selected seed.

🚩TODO

  • super quick instruction for training each LoRAs
  • K-LoRA for SDXL (inference)
  • K-LoRA for FLUX (inference)

🔧 Dependencies and Installation

Installation

git clone https://github.com/ouyangziheng/K-LoRA.git
cd K-LoRA
pip install -r requirements.txt

1. Train LoRAs for subject/style images

In this step, 2 LoRAs for subject/style images are trained based on SDXL. Using SDXL here is important because they found that the pre-trained SDXL exhibits strong learning when fine-tuned on only one reference style image.

Fortunately, diffusers already implemented LoRA based on SDXL here and you can simply follow the instruction.

For example, your training script would be like this.

export MODEL_NAME="stabilityai/stable-diffusion-xl-base-1.0"

# for subject
export OUTPUT_DIR="lora-sdxl-dog"
export INSTANCE_DIR="dog"
export PROMPT="a sbu dog"
export VALID_PROMPT="a sbu dog in a bucket"

# for style
# export OUTPUT_DIR="lora-sdxl-waterpainting"
# export INSTANCE_DIR="waterpainting"
# export PROMPT="a cat of in szn style"
# export VALID_PROMPT="a man in szn style"

accelerate launch train_dreambooth_lora_sdxl.py \
  --pretrained_model_name_or_path=$MODEL_NAME  \
  --instance_data_dir=$INSTANCE_DIR \
  --output_dir=$OUTPUT_DIR \
  --instance_prompt="${PROMPT}" \
  --rank=8 \
  --resolution=1024 \
  --train_batch_size=1 \
  --learning_rate=5e-5 \
  --report_to="wandb" \
  --lr_scheduler="constant" \
  --lr_warmup_steps=0 \
  --max_train_steps=1000 \
  --validation_prompt="${VALID_PROMPT}" \
  --validation_epochs=50 \
  --seed="0" \
  --mixed_precision="no" \
  --enable_xformers_memory_efficient_attention \
  --gradient_checkpointing \
  --use_8bit_adam \

2. Inference

You can directly use the script below for inference or interact by using the gradio.

export MODEL_NAME="stabilityai/stable-diffusion-xl-base-1.0"
export LORA_PATH_CONTENT="..."
export LORA_PATH_STYLE="..."
export OUTPUT_FOLDER="..."  
export PROMPT="..."

python inference.py \
  --pretrained_model_name_or_path="$MODEL_NAME" \
  --lora_name_or_path_content="$LORA_PATH_CONTENT" \
  --lora_name_or_path_style="$LORA_PATH_STYLE" \
  --output_folder="$OUTPUT_FOLDER" \
  --prompt="$PROMPT"

# using gradio 
# python inference_gradio.py \
#   --pretrained_model_name_or_path="$MODEL_NAME" \
#   --lora_name_or_path_content="$LORA_PATH_CONTENT" \
#   --lora_name_or_path_style="$LORA_PATH_STYLE" \
#   --output_folder="$OUTPUT_FOLDER" \
#   --prompt="$PROMPT"

Citation

If you use this code or dataset, please cite the following paper:

Contact

If you have any questions or suggestions, please feel free to open an issue or contact the authors at [email protected].