tools/extract_locon.py

#
# From: https://raw.githubusercontent.com/KohakuBlueleaf/LoCon/main/extract_locon.py
#

import argparse

def get_args():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "base_model", help="The model which use it to train the dreambooth model",
        default='', type=str
    )
    parser.add_argument(
        "db_model", help="the dreambooth model you want to extract the locon",
        default='', type=str
    )
    parser.add_argument(
        "output_name", help="the output model",
        default='./out.pt', type=str
    )
    parser.add_argument(
        "--is_v2", help="Your base/db model is sd v2 or not",
        default=False, action="store_true"
    )
    parser.add_argument(
        "--device", help="Which device you want to use to extract the locon",
        default='cpu', type=str
    )
    parser.add_argument(
        "--mode", 
        help=(
            'extraction mode, can be "fixed", "threshold", "ratio", "percentile". '
            'If not "fixed", network_dim and conv_dim will be ignored'
        ),
        default='fixed', type=str
    )
    parser.add_argument(
        "--linear_dim", help="network dim for linear layer in fixed mode",
        default=1, type=int
    )
    parser.add_argument(
        "--conv_dim", help="network dim for conv layer in fixed mode",
        default=1, type=int
    )
    parser.add_argument(
        "--linear_threshold", help="singular value threshold for linear layer in threshold mode",
        default=0., type=float
    )
    parser.add_argument(
        "--conv_threshold", help="singular value threshold for conv layer in threshold mode",
        default=0., type=float
    )
    parser.add_argument(
        "--linear_ratio", help="singular ratio for linear layer in ratio mode",
        default=0., type=float
    )
    parser.add_argument(
        "--conv_ratio", help="singular ratio for conv layer in ratio mode",
        default=0., type=float
    )
    parser.add_argument(
        "--linear_percentile", help="singular value percentile for linear layer percentile mode",
        default=1., type=float
    )
    parser.add_argument(
        "--conv_percentile", help="singular value percentile for conv layer percentile mode",
        default=1., type=float
    )
    return parser.parse_args()
ARGS = get_args()

from locon.utils import extract_diff
from locon.kohya_model_utils import load_models_from_stable_diffusion_checkpoint

import torch


def main():
    args = ARGS
    base = load_models_from_stable_diffusion_checkpoint(args.is_v2, args.base_model)
    db = load_models_from_stable_diffusion_checkpoint(args.is_v2, args.db_model)
    
    linear_mode_param = {
        'fixed': args.linear_dim,
        'threshold': args.linear_threshold,
        'ratio': args.linear_ratio,
        'percentile': args.linear_percentile,
    }[args.mode]
    conv_mode_param = {
        'fixed': args.conv_dim,
        'threshold': args.conv_threshold,
        'ratio': args.conv_ratio,
        'percentile': args.conv_percentile,
    }[args.mode]
    
    state_dict = extract_diff(
        base, db,
        args.mode,
        linear_mode_param, conv_mode_param,
        args.device
    )
    torch.save(state_dict, args.output_name)


if __name__ == '__main__':
    main()