本文介绍了使用PaddleNLP等工具进行模型训练与推理的流程。先安装paddlenlp等依赖，再分别用dreambooth lora和文生图lora方式训练，设置参数并保存权重。之后可启动visualdl查看训练出图，最后加载训练好的文件，通过相关代码进行推理生成图像。

1. 安装依赖

运行下面的按钮安装依赖，为了确保安装成功，安装完毕请重启内核！（注意：这里只需要运行一次！）In [1]

!pip install -U paddlenlp ppdiffusers safetensors --user

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2. 准备要训练的图片

在这里我们已经在dogs文件夹准备好了如下所示的5张图片。            

3. 开始训练

参数解释：

免费影视、动漫、音乐、游戏、小说资源长期稳定更新！ 👉 点此立即查看 👈

pretrained_model_name_or_path ：想要训练的模型名称，例如："runwayml/stable-diffusion-v1-5"，更多模型可参考 paddlenlp 文档instance_data_dir：想要训练的图片地址。instance_prompt：训练的prompt文本。resolution：训练时图像的大小，建议为512。train_batch_size：训练时候使用的batch_size，可不修改。gradient_accumulation_steps：梯度累积的步数，可不修改。checkpointing_steps：每隔多少步保存模型。learning_rate：训练使用的学习率。report_to：我们将训练过程中出的图片导出到visudl工具中。lr_scheduler：学习率衰减策略，可以是："linear", "constant", "cosine"，"cosine_with_restarts"等。lr_warmup_steps：学习率衰减前，warmup到最大学习率所需要的步数。max_train_steps：最多训练多少步。validation_prompt：训练的过程中我们会评估训练的怎么样，因此我们需要设置评估使用的prompt文本。validation_epochs：每隔多少个epoch评估模型，我们可以查看训练的进度条，知道当前到了第几个epoch。validation_guidance_scale：评估过程中的CFG引导值，默认为5.0.seed：随机种子，设置后可以复现训练结果。lora_rank：lora 的 rank值，默认为128，与开源的版本保持一致。use_lion：表示是否使用lion优化器，如果我们不想使用lion的话需要把 --use_lion True 表示使用 --use_lion False 表示不使用。lora_weight_or_path：我们需要加载的lora权重，当前支持：pt，ckpt，safetensors，和pdparams这些格式，可直接加载这里的lora权重 https://civitai.com/models。

注意：

会保存2种格式的权重，一个是paddle的，一个是safetensors的，可以使用 https://github.com/bmaltais/kohya_ss 这个人的加载。

dreambooth lora

In [6]

!python train_dreambooth_lora.py \  --pretrained_model_name_or_path="runwayml/stable-diffusion-v1-5"  \  --instance_data_dir="./dogs" \  --output_dir="./dream_booth_lora_outputs" \  --instance_prompt="a photo of sks dog" \  --resolution=512 \  --train_batch_size=1 \  --gradient_accumulation_steps=1 \  --checkpointing_steps=100 \  --learning_rate=1e-4 \  --report_to="visualdl" \  --lr_scheduler="constant" \  --lr_warmup_steps=0 \  --max_train_steps=500 \  --lora_rank=128 \  --validation_prompt="A photo of sks dog in a bucket" \  --validation_epochs=25 \  --validation_guidance_scale=5.0 \  --use_lion False \  --seed=0

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[2024-02-23 10:13:09,015] [ WARNING] - You are using a model of type clip_text_model to instantiate a model of type . This is not supported for all configurations of models and can yield errors.W0223 10:13:09.018703 11490 gpu_resources.cc:61] Please NOTE: device: 0, GPU Compute Capability: 7.0, Driver API Version: 11.2, Runtime API Version: 11.2W0223 10:13:09.022612 11490 gpu_resources.cc:91] device: 0, cuDNN Version: 8.2.Train Steps:  20%|███████████████████████▌                                                                                              | 100/500 [01:12<03:04,  2.16it/s, epoch=0019, step_loss=0.0413]Saved lora weights to ./dream_booth_lora_outputs/checkpoint-100Train Steps:  40%|███████████████████████████████████████████████▌                                                                       | 200/500 [02:25<02:19,  2.15it/s, epoch=0039, step_loss=0.446]Saved lora weights to ./dream_booth_lora_outputs/checkpoint-200Train Steps:  60%|██████████████████████████████████████████████████████████████████████▏                                              | 300/500 [03:37<01:33,  2.13it/s, epoch=0059, step_loss=0.00273]Saved lora weights to ./dream_booth_lora_outputs/checkpoint-300Train Steps:  80%|███████████████████████████████████████████████████████████████████████████████████████████████▏                       | 400/500 [04:53<00:47,  2.11it/s, epoch=0079, step_loss=0.275]Saved lora weights to ./dream_booth_lora_outputs/checkpoint-400Train Steps: 100%|█████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 500/500 [05:44<00:00,  2.14it/s, epoch=0099, step_loss=0.00985]Saved lora weights to ./dream_booth_lora_outputs/checkpoint-500Saved final lora weights to ./dream_booth_lora_outputsTrain Steps: 100%|█████████████████████████████████████████████████████████████████████████████████████████████████████████████████████| 500/500 [05:48<00:00,  1.43it/s, epoch=0099, step_loss=0.00985]

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文生图 lora

--train_data_dir 这个需要放图文对的文件夹，里面是图片和txt。

--image_format 表示 train_data_dir 文件夹内的图片格式，比如png，jpg，jpeg

--use_lion Fasle 表示不使用lion优化器。

In [3]

!python train_text_to_image_lora.py \  --pretrained_model_name_or_path="runwayml/stable-diffusion-v1-5"  \  --output_dir="./text_to_image_lora_outputs3" \  --train_data_dir="mishanwu" \  --image_format="png" \  --resolution=512 \  --train_batch_size=1 \  --gradient_accumulation_steps=1 \  --checkpointing_steps=500 \  --learning_rate=6e-5 \  --report_to="visualdl" \  --lr_scheduler="cosine_with_restarts" \  --lr_warmup_steps=0 \  --max_train_steps=1000 \  --lora_rank=128 \  --validation_prompt="1girl, solo, black_background, looking_at_viewer, parted_lips, tears, brown_eyes" \  --validation_epochs=1 \  --validation_guidance_scale=5.0 \  --use_lion False \  --seed=0

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[2024-02-23 11:11:34,386] [ WARNING] - You are using a model of type clip_text_model to instantiate a model of type . This is not supported for all configurations of models and can yield errors.W0223 11:11:34.389356  7327 gpu_resources.cc:61] Please NOTE: device: 0, GPU Compute Capability: 7.0, Driver API Version: 11.2, Runtime API Version: 11.2W0223 11:11:34.392953  7327 gpu_resources.cc:91] device: 0, cuDNN Version: 8.2.Resolving data files: 100%|████████████████| 581/581 [00:00<00:00, 50722.06it/s]Using custom data configuration default-4fb24e511b7f6118Downloading and preparing dataset imagefolder/default to /home/aistudio/.cache/huggingface/datasets/imagefolder/default-4fb24e511b7f6118/0.0.0/37fbb85cc714a338bea574ac6c7d0b5be5aff46c1862c1989b20e0771199e93f...Downloading data files #0:   0%|                        | 0/19 [00:00 by passing `safety_checker=None`. Ensure that you abide to the conditions of the Stable Diffusion license and do not expose unfiltered results in services or applications open to the public. PaddleNLP team, diffusers team and Hugging Face strongly recommend to keep the safety filter enabled in all public facing circumstances, disabling it only for use-cases that involve analyzing network behavior or auditing its results. For more information, please have a look at https://github.com/huggingface/diffusers/pull/254 .Train Steps:  50%|▌| 500/1000 [04:16<03:54,  2.13it/s, epoch=0001, step_loss=0.0Saved lora weights to ./text_to_image_lora_outputs3/checkpoint-500Train Steps:  58%|▌| 580/1000 [04:55<03:09,  2.22it/s, epoch=0001, step_loss=0.2You have disabled the safety checker for  by passing `safety_checker=None`. Ensure that you abide to the conditions of the Stable Diffusion license and do not expose unfiltered results in services or applications open to the public. PaddleNLP team, diffusers team and Hugging Face strongly recommend to keep the safety filter enabled in all public facing circumstances, disabling it only for use-cases that involve analyzing network behavior or auditing its results. For more information, please have a look at https://github.com/huggingface/diffusers/pull/254 .Train Steps:  87%|▊| 870/1000 [07:40<00:58,  2.22it/s, epoch=0002, step_loss=0.0You have disabled the safety checker for  by passing `safety_checker=None`. Ensure that you abide to the conditions of the Stable Diffusion license and do not expose unfiltered results in services or applications open to the public. PaddleNLP team, diffusers team and Hugging Face strongly recommend to keep the safety filter enabled in all public facing circumstances, disabling it only for use-cases that involve analyzing network behavior or auditing its results. For more information, please have a look at https://github.com/huggingface/diffusers/pull/254 .Train Steps: 100%|█| 1000/1000 [09:10<00:00,  1.25it/s, epoch=0003, step_loss=0.Saved lora weights to ./text_to_image_lora_outputs3/checkpoint-1000You have disabled the safety checker for  by passing `safety_checker=None`. Ensure that you abide to the conditions of the Stable Diffusion license and do not expose unfiltered results in services or applications open to the public. PaddleNLP team, diffusers team and Hugging Face strongly recommend to keep the safety filter enabled in all public facing circumstances, disabling it only for use-cases that involve analyzing network behavior or auditing its results. For more information, please have a look at https://github.com/huggingface/diffusers/pull/254 .Saved final lora weights to ./text_to_image_lora_outputs3Train Steps: 100%|█| 1000/1000 [09:44<00:00,  1.71it/s, epoch=0003, step_loss=0.

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4. 启动visualdl程序，查看我们训练过程中出图情况

       

5. 加载训练好的文件进行推理

In [1]

import lora_helperfrom allinone import StableDiffusionPipelineAllinOnefrom ppdiffusers import DPMSolverMultistepSchedulerimport paddle# 基础模型，需要是paddle版本的权重，未来会加更多的权重pretrained_model_name_or_path = "runwayml/stable-diffusion-v1-5"# 我们加载safetensor版本的权重lora_outputs_path = "9070.safetensors"# 加载之前的模型pipe = StableDiffusionPipelineAllinOne.from_pretrained(pretrained_model_name_or_path, safety_checker=None)pipe.scheduler = DPMSolverMultistepScheduler.from_config(pipe.scheduler.config)# 加载lora权重from IPython.display import clear_output, displayclear_output()pipe.apply_lora(lora_outputs_path)

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|---------------当前的rank是 128！|---------------当前的alpha是 128.0！Loading lora_weights successfully!

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import lora_helperfrom allinone import StableDiffusionPipelineAllinOnefrom ppdiffusers import DPMSolverMultistepSchedulerprompt               = "A photo of sks dog in a bucket"negative_prompt      = ""guidance_scale       = 8num_inference_steps  = 25height               = 512width                = 512img = pipe(prompt, negative_prompt=negative_prompt, guidance_scale=guidance_scale, height=height, width=width, num_inference_steps=num_inference_steps).images[0]display(img)display(img.argument)

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  0%|          | 0/25 [00:00登录后复制                
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{'prompt': 'A photo of sks dog in a bucket', 'negative_prompt': '', 'height': 512, 'width': 512, 'num_inference_steps': 25, 'guidance_scale': 8, 'num_images_per_prompt': 1, 'eta': 0.0, 'seed': 3574959348, 'latents': None, 'max_embeddings_multiples': 1, 'no_boseos_middle': False, 'skip_parsing': False, 'skip_weighting': False, 'epoch_time': 1676862593.5281246}
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