复现：latent diffusion（LDM）stable diffusion

JokerSZ.2025-03-10 15:50

复现LDM 已解决所有报错

下载项目

https://github.com/CompVis/latent-diffusion

然后运行环境配置：

复制代码

conda env create -f environment.yaml
conda activate ldm

下载预先训练的权重：

python 复制代码

下载官方权重文件：
mkdir -p models/ldm/text2img-large/
wget -O models/ldm/text2img-large/model.ckpt https://ommer-lab.com/files/latent-diffusion/nitro/txt2img-f8-large/model.ckpt

# 下载modelscope的权重文件：
# pip install modelscope
# modelscope download --model AI-ModelScope/stable-diffusion-v1-5 v1-5-pruned-emaonly.ckpt --local_dir ./models/ldm/stable-diffusion-v1-5
# 链接起来：
# ln -s /root/netdisk/latent-diffusion-main/models/ldm/stable-diffusion-v1-5/v1-5-pruned-emaonly.ckpt models/ldm/stable-diffusion-v1/model.ckpt

复制代码

# 1. 克隆 taming-transformers 仓库
git clone https://github.com/CompVis/taming-transformers.git
cd taming-transformers
安装 taming 模块
pip install .
返回项目根目录
cd /root/netdisk/latent-diffusion-main
直接引用taming包需要将下载的包放到固定的环境目录下：
cp -r /root/netdisk/latent-diffusion-main/taming-transformers /root/.pyenv/versions/3.8.0/lib/python3.8/site-packages
python -c "import taming-transformers; print(my_package.__file__)"

手动下载bert-base-uncased：https://huggingface.co/google-bert/bert-base-uncased/tree/main

修改代码：

复制代码

from transformers import BertTokenizerFast  # TODO: add to reuquirements
        # 从本地路径加载分词器
        self.tokenizer = BertTokenizerFast.from_pretrained("./bert-base-uncased")

运行采样生成：

复制代码

python scripts/txt2img.py --prompt "a virus monster is playing guitar, oil on canvas" --ddim_eta 0.0 --n_samples 4 --n_iter 4 --scale 5.0  --ddim_steps 50

python scripts/txt2img.py --prompt "Handsome man and beautiful woman walking in the rain, oil on canvas" --ddim_eta 0.0 --n_samples 4 --n_iter 4 --scale 5.0  --ddim_steps 50

效果展示：