FlowDrag:
3D-aware Drag-based Image Editing with
Mesh-guided Deformation Vector Flow Fields

Gwanhyeong Koo, Sunjae Yoon, Younghwan Lee, Ji Woo Hong, Chang D. Yoo
KAIST

📢 Release

• [07/12/2024] Initial preview release
• [12/28/2024] Code and VFD-Bench dataset released

🐶 Introduction

FlowDrag is a 3D-aware drag-based image editing method that leverages mesh-guided deformation vector flow fields. Our approach generates spatially coherent edits by utilizing 3D mesh deformations to guide the flow field.

Key Features

• 🎯 3D-Aware Editing: Utilizes 3D mesh deformations for spatially coherent edits
• 🌊 Flow Field Guidance: Generates dense deformation vector fields from sparse user inputs
• 📊 VFD-Bench Dataset: Comprehensive benchmark for evaluating drag-based editing methods
• 🚀 Interactive UI: User-friendly Gradio interface for real-time editing

📁 Project Structure

FlowDrag/
├── flowdrag_ui.py              # Main inference UI
├── pipeline.py                 # FlowDrag pipeline implementation
├── bench_flowdrag.py           # Evaluation on VFD-Bench
├── dataset/
│   └── VFD_Bench_Dataset/      # Benchmark dataset
├── mesh_deformation/
│   └── flowdrag_mesh_deform_ui.py  # Mesh deformation UI
├── utils/
│   ├── drag_utils.py           # Core drag editing utilities
│   ├── lora_utils.py           # LoRA training utilities
│   ├── attn_utils.py           # Attention manipulation
│   └── ui_utils.py             # UI helper functions
├── samples/                    # Sample images and results
└── environment_flowdrag.yaml   # Conda environment

💻 Installation

Setup

# Clone the repository
git clone https://github.com/kookie12/FlowDrag.git
cd FlowDrag

# Create conda environment
conda env create -f environment_flowdrag.yaml
conda activate flowdrag

🚀 Usage

Interactive Editing

Launch the Gradio interface for interactive drag-based editing:

python flowdrag_ui.py

The UI will open in your browser where you can:

1. Upload an image
2. Place handle points (points to drag) and target points (destinations)
3. Adjust deformation parameters
4. Generate edited results

Mesh Deformation UI

For 3D mesh-guided flow field generation (recommended on local machine for Open3D visualization):

cd mesh_deformation
python flowdrag_mesh_deform_ui.py

This generates {sample_name}_vector_field.npy files from input meshes.

📊 Evaluation

VFD-Bench Dataset

Download the VFD-Bench dataset:

• Access Form: Google Form

Place the dataset in dataset/VFD_Bench_Dataset/.

LoRA Training

Train LoRA weights for all samples in the VFD-Bench dataset:

# Set paths (optional, defaults provided)
export INPUT_DATASET_PATH="dataset/VFD_Bench_Dataset"
export OUTPUT_LORA_PATH="lora_data/VFD_Bench_Dataset"

# Run training
python evaluation/run_lora_training_vfd_bench.py

LoRA weights will be saved in lora_data/VFD_Bench_Dataset/.

Run Benchmark

Evaluate FlowDrag on the VFD-Bench dataset:

python bench_flowdrag.py

Results will be saved in the VFD_Bench_result_flowdrag/ folder, including:

• Edited images
• Concatenated visualizations
• Quantitative metrics

🙌🏻 Acknowledgments

Our code is built upon the following excellent projects:

• GoodDrag
• DragDiffusion
• DragGAN

We thank the authors for their great work!

📖 Citation

If you find our work useful, please consider citing:

@article{koo2025flowdrag,
  title={Flowdrag: 3d-aware drag-based image editing with mesh-guided deformation vector flow fields},
  author={Koo, Gwanhyeong and Yoon, Sunjae and Lee, Younghwan and Hong, Ji Woo and Yoo, Chang D},
  journal={arXiv preprint arXiv:2507.08285},
  year={2025}
}

Acknowledgement (Funding)

This work was partly supported by Institute for Information & communications Technology Planning & Evaluation (IITP) grant funded by the Korea government(MSIT) (No. 2021-0-01381, Development of Causal AI through Video Understanding and Reinforcement Learning, and Its Applications to Real Environments) and partly supported by Institute of Information & communications Technology Planning & Evaluation (IITP) grant funded by the Korea government(MSIT) (No.2022-0-00184, Development and Study of AI Technologies to Inexpensively Conform to Evolving Policy on Ethics).