simpletuner

This is a PEFT SingLoRA derived from stabilityai/stable-diffusion-xl-base-1.0.

The main validation prompt used during training was:

A photo-realistic image of a River Phoenix sitting in a field of lavender flowers. The River Phoenix is looking at the viewer.

Validation settings

• CFG: 4.2
• CFG Rescale: 0.0
• Steps: 20
• Sampler: ddim
• Seed: 42
• Resolution: 1024x1024

Note: The validation settings are not necessarily the same as the training settings.

The text encoder was not trained. You may reuse the base model text encoder for inference.

Training settings

• Training epochs: 0

• Training steps: 1

• Learning rate: 0.0001

  • Learning rate schedule: constant
  • Warmup steps: 0

• Max grad value: 2.0

• Effective batch size: 4

  • Micro-batch size: 4
  • Gradient accumulation steps: 1
  • Number of GPUs: 1

• Gradient checkpointing: True

• Prediction type: epsilon (extra parameters=['training_scheduler_timestep_spacing=trailing', 'inference_scheduler_timestep_spacing=trailing'])

• Optimizer: optimi-stableadamw

• Trainable parameter precision: Pure BF16

• Base model precision: int8-quanto

• Caption dropout probability: 0.1%

• LoRA Rank: 16

• LoRA Alpha: None

• LoRA Dropout: 0.1

• LoRA initialisation style: default

• LoRA mode: SingLoRA

Datasets

subject-1024

• Repeats: 4
• Total number of images: 29
• Total number of aspect buckets: 9
• Resolution: 1.048576 megapixels
• Cropped: False
• Crop style: None
• Crop aspect: None
• Used for regularisation data: No

subject-512

• Repeats: 4
• Total number of images: 29
• Total number of aspect buckets: 8
• Resolution: 0.262144 megapixels
• Cropped: False
• Crop style: None
• Crop aspect: None
• Used for regularisation data: No

Inference

import torch
from diffusers import DiffusionPipeline

from peft_singlora import setup_singlora
setup_singlora() # overwrites the nn.Linear mapping in PEFT.
model_id = 'stabilityai/stable-diffusion-xl-base-1.0'
adapter_id = 'bghira/simpletuner'
pipeline = DiffusionPipeline.from_pretrained(model_id, torch_dtype=torch.bfloat16) # loading directly in bf16
pipeline.load_lora_weights(adapter_id)

prompt = "A photo-realistic image of a River Phoenix sitting in a field of lavender flowers. The River Phoenix is looking at the viewer."
negative_prompt = 'blurry, cropped, ugly'

## Optional: quantise the model to save on vram.
## Note: The model was quantised during training, and so it is recommended to do the same during inference time.
from optimum.quanto import quantize, freeze, qint8
quantize(pipeline.unet, weights=qint8)
freeze(pipeline.unet)
    
pipeline.to('cuda' if torch.cuda.is_available() else 'mps' if torch.backends.mps.is_available() else 'cpu') # the pipeline is already in its target precision level
model_output = pipeline(
    prompt=prompt,
    negative_prompt=negative_prompt,
    num_inference_steps=20,
    generator=torch.Generator(device='cuda' if torch.cuda.is_available() else 'mps' if torch.backends.mps.is_available() else 'cpu').manual_seed(42),
    width=1024,
    height=1024,
    guidance_scale=4.2,
    guidance_rescale=0.0,
).images[0]

model_output.save("output.png", format="PNG")