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432 lines
17 KiB
Markdown
432 lines
17 KiB
Markdown
# 微调
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我们实现了一个用于文本到图像扩散模型的训练框架，使用户能够轻松地使用我们的框架训练 LoRA 模型。我们提供的脚本具有以下特点：
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* **全面功能与用户友好性**：我们的训练框架支持多GPU和多机器配置，便于使用 DeepSpeed 加速，并包括梯度检查点优化，适用于内存需求较大的模型。
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* **代码简洁与研究者可及性**：我们避免了大块复杂的代码。通用模块实现于 `diffsynth/trainers/text_to_image.py` 中，而模型特定的训练脚本仅包含与模型架构相关的最少代码，便于研究人员使用。
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* **模块化设计与开发者灵活性**：基于通用的 Pytorch-Lightning 框架，我们的训练框架在功能上是解耦的，允许开发者通过修改我们的脚本轻松引入额外的训练技术，以满足他们的需求。
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LoRA 微调的图像示例。提示词为 "一只小狗蹦蹦跳跳，周围是姹紫嫣红的鲜花，远处是山脉"（针对中文模型）或 "a dog is jumping, flowers around the dog, the background is mountains and clouds"（针对英文模型）。
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||Kolors|Stable Diffusion 3|Hunyuan-DiT|
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## 下载需要的包
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```bash
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pip install peft lightning
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```
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## 准备你的数据
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我们提供了一个 [示例数据集](https://modelscope.cn/datasets/buptwq/lora-stable-diffusion-finetune/files)。你需要将训练数据集按照如下形式组织：
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```
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data/dog/
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└── train
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├── 00.jpg
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├── 01.jpg
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├── 02.jpg
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├── 03.jpg
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├── 04.jpg
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└── metadata.csv
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```
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`metadata.csv`:
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```
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file_name,text
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00.jpg,a dog
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01.jpg,a dog
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02.jpg,a dog
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03.jpg,a dog
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04.jpg,a dog
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```
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请注意，如果模型是中文模型（例如，Hunyuan-DiT 和 Kolors），我们建议在数据集中使用中文文本。例如：
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```
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file_name,text
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00.jpg,一只小狗
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01.jpg,一只小狗
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02.jpg,一只小狗
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03.jpg,一只小狗
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04.jpg,一只小狗
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```
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## 训练 LoRA 模型
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参数选项：
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```
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--lora_target_modules LORA_TARGET_MODULES
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LoRA 模块所在的层。
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--dataset_path DATASET_PATH
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数据集的路径。
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--output_path OUTPUT_PATH
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模型保存路径。
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--steps_per_epoch STEPS_PER_EPOCH
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每个周期的步数。
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--height HEIGHT 图像高度。
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--width WIDTH 图像宽度。
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--center_crop 是否将输入图像中心裁剪到指定分辨率。如果未设置，图像将被随机裁剪。图像会在裁剪前先调整到指定分辨率。
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--random_flip 是否随机水平翻转图像。
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--batch_size BATCH_SIZE
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训练数据加载器的批量大小（每设备）。
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--dataloader_num_workers DATALOADER_NUM_WORKERS
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数据加载使用的子进程数量。0 表示数据将在主进程中加载。
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--precision {32,16,16-mixed}
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训练精度。
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--learning_rate LEARNING_RATE
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学习率。
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--lora_rank LORA_RANK
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LoRA 更新矩阵的维度。
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--lora_alpha LORA_ALPHA
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LoRA 更新矩阵的权重。
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--use_gradient_checkpointing
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是否使用梯度检查点。
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--accumulate_grad_batches ACCUMULATE_GRAD_BATCHES
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梯度累积的批次数量。
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--training_strategy {auto,deepspeed_stage_1,deepspeed_stage_2,deepspeed_stage_3}
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训练策略。
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--max_epochs MAX_EPOCHS
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训练周期数。
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--modelscope_model_id MODELSCOPE_MODEL_ID
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ModelScope 上的模型 ID (https://www.modelscope.cn/)。如果提供模型 ID，模型将自动上传到 ModelScope。
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```
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### Kolors
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以下文件将用于构建 Kolors。你可以从 [HuggingFace](https://huggingface.co/Kwai-Kolors/Kolors) 或 [ModelScope](https://modelscope.cn/models/Kwai-Kolors/Kolors) 下载 Kolors。由于精度溢出问题，我们需要下载额外的 VAE 模型（从 [HuggingFace](https://huggingface.co/madebyollin/sdxl-vae-fp16-fix) 或 [ModelScope](https://modelscope.cn/models/AI-ModelScope/sdxl-vae-fp16-fix)）。你可以使用以下代码下载这些文件：
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```python
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from diffsynth import download_models
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download_models(["Kolors", "SDXL-vae-fp16-fix"])
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```
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```
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models
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├── kolors
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│ └── Kolors
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│ ├── text_encoder
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│ │ ├── config.json
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│ │ ├── pytorch_model-00001-of-00007.bin
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│ │ ├── pytorch_model-00002-of-00007.bin
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│ │ ├── pytorch_model-00003-of-00007.bin
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│ │ ├── pytorch_model-00004-of-00007.bin
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│ │ ├── pytorch_model-00005-of-00007.bin
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│ │ ├── pytorch_model-00006-of-00007.bin
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│ │ ├── pytorch_model-00007-of-00007.bin
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│ │ └── pytorch_model.bin.index.json
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│ ├── unet
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│ │ └── diffusion_pytorch_model.safetensors
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│ └── vae
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│ └── diffusion_pytorch_model.safetensors
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└── sdxl-vae-fp16-fix
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└── diffusion_pytorch_model.safetensors
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```
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使用下面的命令启动训练任务：
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```
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CUDA_VISIBLE_DEVICES="0" python examples/train/kolors/train_kolors_lora.py \
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--pretrained_unet_path models/kolors/Kolors/unet/diffusion_pytorch_model.safetensors \
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--pretrained_text_encoder_path models/kolors/Kolors/text_encoder \
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--pretrained_fp16_vae_path models/sdxl-vae-fp16-fix/diffusion_pytorch_model.safetensors \
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--dataset_path data/dog \
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--output_path ./models \
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--max_epochs 1 \
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--steps_per_epoch 500 \
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--height 1024 \
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--width 1024 \
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--center_crop \
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--precision "16-mixed" \
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--learning_rate 1e-4 \
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--lora_rank 4 \
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--lora_alpha 4 \
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--use_gradient_checkpointing
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```
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有关参数的更多信息，请使用 `python examples/train/kolors/train_kolors_lora.py -h` 查看详细信息。
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训练完成后，使用 `model_manager.load_lora` 加载 LoRA 以进行推理。
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```python
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from diffsynth import ModelManager, SD3ImagePipeline
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import torch
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model_manager = ModelManager(torch_dtype=torch.float16, device="cuda",
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file_path_list=["models/stable_diffusion_3/sd3_medium_incl_clips.safetensors"])
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model_manager.load_lora("models/lightning_logs/version_0/checkpoints/epoch=0-step=500.ckpt", lora_alpha=1.0)
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pipe = SD3ImagePipeline.from_model_manager(model_manager)
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torch.manual_seed(0)
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image = pipe(
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prompt="a dog is jumping, flowers around the dog, the background is mountains and clouds",
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negative_prompt="bad quality, poor quality, doll, disfigured, jpg, toy, bad anatomy, missing limbs, missing fingers, 3d, cgi, extra tails",
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cfg_scale=7.5,
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num_inference_steps=100, width=1024, height=1024,
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)
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image.save("image_with_lora.jpg")
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```
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### Stable Diffusion 3
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训练脚本只需要一个文件。你可以使用 [`sd3_medium_incl_clips.safetensors`](https://huggingface.co/stabilityai/stable-diffusion-3-medium/resolve/main/sd3_medium_incl_clips.safetensors)（没有 T5 Encoder）或 [`sd3_medium_incl_clips_t5xxlfp16.safetensors`](https://huggingface.co/stabilityai/stable-diffusion-3-medium/resolve/main/sd3_medium_incl_clips_t5xxlfp16.safetensors)（有 T5 Encoder）。请使用以下代码下载这些文件：
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```python
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from diffsynth import download_models
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download_models(["StableDiffusion3", "StableDiffusion3_without_T5"])
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```
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```
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models/stable_diffusion_3/
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├── Put Stable Diffusion 3 checkpoints here.txt
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├── sd3_medium_incl_clips.safetensors
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└── sd3_medium_incl_clips_t5xxlfp16.safetensors
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```
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使用下面的命令启动训练任务：
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```
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CUDA_VISIBLE_DEVICES="0" python examples/train/stable_diffusion_3/train_sd3_lora.py \
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--pretrained_path models/stable_diffusion_3/sd3_medium_incl_clips.safetensors \
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--dataset_path data/dog \
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--output_path ./models \
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--max_epochs 1 \
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--steps_per_epoch 500 \
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--height 1024 \
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--width 1024 \
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--center_crop \
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--precision "16-mixed" \
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--learning_rate 1e-4 \
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--lora_rank 4 \
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--lora_alpha 4 \
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--use_gradient_checkpointing
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```
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有关参数的更多信息，请使用 `python examples/train/stable_diffusion_3/train_sd3_lora.py -h` 查看详细信息。
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训练完成后，使用 `model_manager.load_lora` 加载 LoRA 以进行推理。
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```python
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from diffsynth import ModelManager, SD3ImagePipeline
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import torch
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model_manager = ModelManager(torch_dtype=torch.float16, device="cuda",
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file_path_list=["models/stable_diffusion_3/sd3_medium_incl_clips.safetensors"])
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model_manager.load_lora("models/lightning_logs/version_0/checkpoints/epoch=0-step=500.ckpt", lora_alpha=1.0)
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pipe = SD3ImagePipeline.from_model_manager(model_manager)
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torch.manual_seed(0)
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image = pipe(
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prompt="a dog is jumping, flowers around the dog, the background is mountains and clouds",
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negative_prompt="bad quality, poor quality, doll, disfigured, jpg, toy, bad anatomy, missing limbs, missing fingers, 3d, cgi, extra tails",
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cfg_scale=7.5,
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num_inference_steps=100, width=1024, height=1024,
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)
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image.save("image_with_lora.jpg")
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```
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### Hunyuan-DiT
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构建 Hunyuan DiT 需要四个文件。你可以从 [HuggingFace](https://huggingface.co/Tencent-Hunyuan/HunyuanDiT) 或 [ModelScope](https://www.modelscope.cn/models/modelscope/HunyuanDiT/summary) 下载这些文件。你可以使用以下代码下载这些文件：
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```python
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from diffsynth import download_models
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download_models(["HunyuanDiT"])
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```
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```
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models/HunyuanDiT/
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├── Put Hunyuan DiT checkpoints here.txt
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└── t2i
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├── clip_text_encoder
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│ └── pytorch_model.bin
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├── model
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│ └── pytorch_model_ema.pt
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├── mt5
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│ └── pytorch_model.bin
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└── sdxl-vae-fp16-fix
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└── diffusion_pytorch_model.bin
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```
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Launch the training task using the following command:
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```
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CUDA_VISIBLE_DEVICES="0" python examples/train/hunyuan_dit/train_hunyuan_dit_lora.py \
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--pretrained_path models/HunyuanDiT/t2i \
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--dataset_path data/dog \
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--output_path ./models \
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--max_epochs 1 \
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--steps_per_epoch 500 \
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--height 1024 \
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--width 1024 \
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--center_crop \
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--precision "16-mixed" \
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--learning_rate 1e-4 \
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--lora_rank 4 \
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--lora_alpha 4 \
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--use_gradient_checkpointing
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```
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有关参数的更多信息，请使用 `python examples/train/hunyuan_dit/train_hunyuan_dit_lora.py -h` 查看详细信息。
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训练完成后，使用 `model_manager.load_lora` 加载 LoRA 以进行推理。
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```python
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from diffsynth import ModelManager, HunyuanDiTImagePipeline
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import torch
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model_manager = ModelManager(torch_dtype=torch.float16, device="cuda",
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file_path_list=[
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"models/HunyuanDiT/t2i/clip_text_encoder/pytorch_model.bin",
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"models/HunyuanDiT/t2i/model/pytorch_model_ema.pt",
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"models/HunyuanDiT/t2i/mt5/pytorch_model.bin",
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"models/HunyuanDiT/t2i/sdxl-vae-fp16-fix/diffusion_pytorch_model.bin"
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])
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model_manager.load_lora("models/lightning_logs/version_0/checkpoints/epoch=0-step=500.ckpt", lora_alpha=1.0)
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pipe = HunyuanDiTImagePipeline.from_model_manager(model_manager)
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torch.manual_seed(0)
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image = pipe(
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prompt="一只小狗蹦蹦跳跳，周围是姹紫嫣红的鲜花，远处是山脉",
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negative_prompt="",
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cfg_scale=7.5,
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num_inference_steps=100, width=1024, height=1024,
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)
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image.save("image_with_lora.jpg")
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```
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### Stable Diffusion
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训练脚本只需要一个文件。我们支持 [CivitAI](https://civitai.com/) 中的主流检查点。默认情况下，我们使用基础的 Stable Diffusion v1.5。你可以从 [HuggingFace](https://huggingface.co/runwayml/stable-diffusion-v1-5/resolve/main/v1-5-pruned-emaonly.safetensors) 或 [ModelScope](https://www.modelscope.cn/models/AI-ModelScope/stable-diffusion-v1-5/resolve/master/v1-5-pruned-emaonly.safetensors) 下载。你可以使用以下代码下载这个文件：
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```python
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from diffsynth import download_models
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download_models(["StableDiffusion_v15"])
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```
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```
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models/stable_diffusion
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├── Put Stable Diffusion checkpoints here.txt
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└── v1-5-pruned-emaonly.safetensors
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```
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Launch the training task using the following command:
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```
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CUDA_VISIBLE_DEVICES="0" python examples/train/stable_diffusion/train_sd_lora.py \
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--pretrained_path models/stable_diffusion/v1-5-pruned-emaonly.safetensors \
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--dataset_path data/dog \
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--output_path ./models \
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--max_epochs 1 \
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--steps_per_epoch 500 \
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--height 512 \
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--width 512 \
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--center_crop \
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--precision "16-mixed" \
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--learning_rate 1e-4 \
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--lora_rank 4 \
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--lora_alpha 4 \
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--use_gradient_checkpointing
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```
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有关参数的更多信息，请使用 `python examples/train/stable_diffusion/train_sd_lora.py -h` 查看详细信息。
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训练完成后，使用 `model_manager.load_lora` 加载 LoRA 以进行推理。
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```python
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from diffsynth import ModelManager, SDImagePipeline
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import torch
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model_manager = ModelManager(torch_dtype=torch.float16, device="cuda",
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file_path_list=["models/stable_diffusion/v1-5-pruned-emaonly.safetensors"])
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model_manager.load_lora("models/lightning_logs/version_0/checkpoints/epoch=0-step=500.ckpt", lora_alpha=1.0)
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pipe = SDImagePipeline.from_model_manager(model_manager)
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torch.manual_seed(0)
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image = pipe(
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prompt="a dog is jumping, flowers around the dog, the background is mountains and clouds",
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negative_prompt="bad quality, poor quality, doll, disfigured, jpg, toy, bad anatomy, missing limbs, missing fingers, 3d, cgi, extra tails",
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cfg_scale=7.5,
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num_inference_steps=100, width=512, height=512,
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)
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image.save("image_with_lora.jpg")
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```
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### Stable Diffusion XL
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训练脚本只需要一个文件。我们支持 [CivitAI](https://civitai.com/) 中的主流检查点。默认情况下，我们使用基础的 Stable Diffusion XL。你可以从 [HuggingFace](https://huggingface.co/stabilityai/stable-diffusion-xl-base-1.0/resolve/main/sd_xl_base_1.0.safetensors) 或 [ModelScope](https://www.modelscope.cn/models/AI-ModelScope/stable-diffusion-xl-base-1.0/resolve/master/sd_xl_base_1.0.safetensors) 下载。也可以使用以下代码下载这个文件：
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```python
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from diffsynth import download_models
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download_models(["StableDiffusionXL_v1"])
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```
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```
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models/stable_diffusion_xl
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├── Put Stable Diffusion XL checkpoints here.txt
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└── sd_xl_base_1.0.safetensors
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```
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We observed that Stable Diffusion XL is not float16-safe, thus we recommand users to use float32.
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```
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CUDA_VISIBLE_DEVICES="0" python examples/train/stable_diffusion_xl/train_sdxl_lora.py \
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--pretrained_path models/stable_diffusion_xl/sd_xl_base_1.0.safetensors \
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--dataset_path data/dog \
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--output_path ./models \
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--max_epochs 1 \
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--steps_per_epoch 500 \
|
||
--height 1024 \
|
||
--width 1024 \
|
||
--center_crop \
|
||
--precision "32" \
|
||
--learning_rate 1e-4 \
|
||
--lora_rank 4 \
|
||
--lora_alpha 4 \
|
||
--use_gradient_checkpointing
|
||
```
|
||
|
||
有关参数的更多信息，请使用 `python examples/train/stable_diffusion_xl/train_sdxl_lora.py -h` 查看详细信息。
|
||
|
||
训练完成后，使用 `model_manager.load_lora` 加载 LoRA 以进行推理。
|
||
|
||
```python
|
||
from diffsynth import ModelManager, SDXLImagePipeline
|
||
import torch
|
||
|
||
model_manager = ModelManager(torch_dtype=torch.float16, device="cuda",
|
||
file_path_list=["models/stable_diffusion_xl/sd_xl_base_1.0.safetensors"])
|
||
model_manager.load_lora("models/lightning_logs/version_0/checkpoints/epoch=0-step=500.ckpt", lora_alpha=1.0)
|
||
pipe = SDXLImagePipeline.from_model_manager(model_manager)
|
||
|
||
torch.manual_seed(0)
|
||
image = pipe(
|
||
prompt="a dog is jumping, flowers around the dog, the background is mountains and clouds",
|
||
negative_prompt="bad quality, poor quality, doll, disfigured, jpg, toy, bad anatomy, missing limbs, missing fingers, 3d, cgi, extra tails",
|
||
cfg_scale=7.5,
|
||
num_inference_steps=100, width=1024, height=1024,
|
||
)
|
||
image.save("image_with_lora.jpg")
|
||
```
|