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README.md
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license: apache-2.0
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---
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license: apache-2.0
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---
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# Qwen-Image-Edit LoRA Adapter
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This repository contains LoRA weights for **Qwen-Image-Edit**, fine-tuned for instruction-based image editing tasks.
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## Model Details
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- **Base Model:** [Qwen-Image-Edit-2509](https://huggingface.co/Qwen/Qwen-Image-Edit-2509) (or your specific base model)
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- **Training:** Fine-tuned using PEFT/LoRA.
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## Usage
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To use this LoRA, you need to load the base `QwenImageEditPlusPipeline` and apply the adapter weights.
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Since the LoRA keys trained via PEFT often differ from what Diffusers expects, the script below includes an **automatic conversion step** to ensure the weights load correctly.
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### Python Inference Script
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You can run this script to edit a single image.
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```python
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import os
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import torch
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from PIL import Image
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from diffusers import QwenImageEditPlusPipeline
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from safetensors.torch import load_file, save_file
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def load_lora_with_conversion(pipeline, lora_folder_path, weight_name="adapter_model.safetensors"):
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"""
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Automatically converts PEFT LoRA keys to Diffusers format if needed and loads them.
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"""
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# Define paths
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original_weights_path = os.path.join(lora_folder_path, weight_name)
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converted_weights_path = os.path.join(lora_folder_path, "adapter_model_converted.safetensors")
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# Check if conversion is needed
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if not os.path.exists(converted_weights_path):
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print(f"⚠️ Converted weights not found. Converting {original_weights_path}...")
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if not os.path.exists(original_weights_path):
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raise FileNotFoundError(f"Cannot find LoRA weights at {original_weights_path}")
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state_dict = load_file(original_weights_path)
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new_state_dict = {}
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# Conversion logic: replace 'base_model.model' with 'transformer'
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for key, value in state_dict.items():
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new_key = key.replace("base_model.model", "transformer")
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new_state_dict[new_key] = value
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save_file(new_state_dict, converted_weights_path)
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print(f"✅ Conversion saved to {converted_weights_path}")
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else:
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print(f"✅ Found converted weights at {converted_weights_path}")
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# Load the converted LoRA
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pipeline.load_lora_weights(
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lora_folder_path,
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weight_name="adapter_model_converted.safetensors",
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adapter_name="lora",
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)
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pipeline.set_adapters(["lora"], adapter_weights=[1.0])
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print("🚀 LoRA loaded and active.")
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def main():
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# --- Configuration ---
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# 1. Path to the base model (Local path or HuggingFace ID)
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base_model_path = "Qwen/Qwen-Image-Edit-2509" # Replace with your local path if needed
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# 2. Path to THIS LoRA folder (where you downloaded this repo)
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lora_path = "./" # Current directory if you cloned the repo
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# 3. Input Image and Prompt
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image_path = "test_image.jpg" # Replace with your image path
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prompt = "remove the dog and replace it with a cat"
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output_path = "result.png"
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# ---------------------
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# Load Pipeline
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print(f"Loading base model from: {base_model_path}")
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pipeline = QwenImageEditPlusPipeline.from_pretrained(
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base_model_path,
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torch_dtype=torch.bfloat16
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)
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pipeline.to("cuda")
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# Load LoRA
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try:
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load_lora_with_conversion(pipeline, lora_path)
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except Exception as e:
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print(f"Error loading LoRA: {e}")
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return
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# Load Image
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if not os.path.exists(image_path):
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print(f"Error: Image not found at {image_path}")
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return
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original_image = Image.open(image_path).convert("RGB")
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# Inference
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print("🎨 Generating edit...")
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inputs = {
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"image": original_image,
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"prompt": prompt,
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"generator": torch.manual_seed(42), # Fixed seed for reproducibility
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"true_cfg_scale": 4.0, # Recommended for Qwen-Edit
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"guidance_scale": 1.0,
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"negative_prompt": " ",
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"num_inference_steps": 40,
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}
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with torch.inference_mode():
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output = pipeline(**inputs)
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output_image = output.images[0]
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output_image.save(output_path)
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print(f"✅ Image saved to {output_path}")
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if __name__ == "__main__":
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main()
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