Edit-Banana

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[!WARNING] Please note: Our GitHub repository currently trails behind our web-based service. For the most up-to-date features and performance, we recommend using our web platform.

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💬 Join WeChat Group

Welcome to join our WeChat group to discuss and exchange ideas! Scan the QR code below to join:

[!TIP] If the QR code has expired, please submit an Issue to request an updated one.

👨‍🏫 Leader

Guoren Wang

Professor · Doctoral Supervisor

Database Systems Uncertain Data Management Multimedia Data Management Distributed Query Processing

Homepage →

Ye Yuan

Professor · Doctoral Supervisor

Big Data Management Graph Data Management Spatio-temporal Data Distributed Computing

Homepage →

Chengliang Chai

Associate Professor · Doctoral Supervisor

Data-centric AI Large Language Models Data Lakes Database Systems

Homepage →

📮 Contact Us

For academic cooperation, technical docking, commercial licensing, project customization and other business inquiries, please contact us via email:

E-mail: ccl@bit.edu.cn

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📑 Table of Contents

• 📸 Effect Demonstration
• 🚀 Key Features
• 🛠️ Architecture Pipeline
• 📂 Project Structure
• 📦 Installation & Setup
• 🔤 Usage
• ⚙️ Configuration
• 📌 Development Roadmap
• 💬 Join WeChat Group
• 🤝 Contribution Guidelines
• 🤩 Contributors
• 📄 License
• 🌟 Star History

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📸 Effect Demonstration

High-Definition Input-Output Comparison (4 Typical Scenarios)

To demonstrate the high-fidelity conversion effect, we provides one-to-one comparisons between 4 scenarios of "original static formats" and "editable reconstruction results". All elements can be individually dragged, styled, and modified.

Scenario 1: Figures to DrawIO

🔒 Original Static Diagram (Input · Non-editable)	🔓 DrawIO Reconstruction Result (Output · Fully Editable)
Example 1: Basic Flowchart	✨ Editable Flowchart
Example 2: Multi-level Architecture	✨ Editable Architecture
Example 3: Technical Schematic	✨ Editable Schematic
Example 4: Scientific Formula	✨ Editable Formula

Scenario 2: Human in the Loop Modification

✨ Save locally

[!NOTE] ✨ Conversion Highlights:

1. Preserves the layout logic, color matching, and element hierarchy of the original diagram.
2. 1:1 restoration of shape stroke/fill and arrow styles (dashed lines/thickness).
3. Accurate text recognition, supporting direct subsequent editing and format adjustment.
4. All elements are independently selectable, supporting native DrawIO template replacement and layout optimization.

🚀 Key Features

• Advanced Segmentation: Using our fine-tuned SAM 3 (Segment Anything Model 3) for segmentation of diagram elements.

• Fixed Multi-Round VLM Scanning: An extraction process guided by Multimodal LLMs.

• Text Recognition:

  • Local OCR for text localization; easy to install, runs offline.
  • Pix2Text for mathematical formula recognition and LaTeX conversion .
  • Crop-Guided Strategy: Extracts text/formula regions and sends high-res crops to the formula engine.

• User System:

  • Registration: New users receive 10 free credits.
  • Credit System: Pay-per-use model prevents resource abuse.
  • Multi-User Concurrency: Built-in support for concurrent user sessions using a Global Lock mechanism for thread-safe GPU access and an LRU Cache (Least Recently Used) to persist image embeddings across requests, ensuring high performance and stability.

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🛠️ Architecture Pipeline

1. Input: Image (PNG/JPG/BMP/TIFF/WebP).
2. Segmentation (SAM3): Using our fine-tuned SAM3 mask decoder.
3. Text Extraction (Parallel):
   • Local OCR (Tesseract) detects text bounding boxes.
   • High-res crops of text/formula regions are sent to Pix2Text for LaTeX conversion.
4. DrawIO XML Generation: Merging spatial data from SAM3 and text OCR results.

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📂 Project Structure

Edit-Banana/
├── config/               # Configuration files (copy config.yaml.example → config.yaml)
├── flowchart_text/       # OCR & Text Extraction Module (standalone entry)
│   ├── src/
│   └── main.py             # OCR-only entry point
├── input/                # [Manual] Input images directory
├── models/               # [Manual] Model weights (SAM3) and optional BPE vocab
├── output/               # [Manual] Results directory
├── sam3/                 # SAM3 library (see Installation: install from facebookresearch/sam3)
├── sam3_service/         # SAM3 HTTP service (optional, for multi-process deployment)
├── scripts/              # Setup and utility scripts
│   ├── setup_sam3.sh       # Install SAM3 lib and copy BPE to models/
│   ├── setup_rmbg.py       # Download RMBG model from ModelScope
│   └── merge_xml.py        # XML merge utilities
├── main.py               # CLI entry (modular pipeline)
├── server_pa.py          # FastAPI backend server
└── requirements.txt      # Python dependencies

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📦 Installation & Setup

Follow these core phases to set up the project locally.

Phase 1: Environment & Base Setup

Configure your base environment and directory structure.

1. Prerequisites & Environment

• Python 3.10+** & CUDA-capable GPU (Highly recommended)

• Install PyTorch with CUDA support (e.g., for CUDA 11.8):

  pip install torch torchvision --index-url https://download.pytorch.org/whl/cu118
  

2. Clone Repository & Init Directories

git clone https://github.com/BIT-DataLab/Edit-Banana.git
cd Edit-Banana
mkdir -p input output sam3_output

Phase 2: Models & Core Dependencies

Next, install the required packages and download necessary model weights (which should be placed in models/ and not committed).

1. Base Dependencies

pip install -r requirements.txt

2. SAM3 & Model Assets

• SAM3 Library & BPE: Run bash scripts/setup_sam3.shto install the lib and copy the BPE vocab to models/. Verify with:

  python -c "from sam3.model_builder import build_sam3_image_model; print('OK')"
  

• SAM3 Weights: Download sam3.pt from ModelScope or Hugging Face and place it under models/sam3_ms.

• Text Local OCR (Tesseract):

  sudo apt install tesseract-ocr tesseract-ocr-chi-sim
  

• PaddleOCR (Alternative/Better for mixed text): Use paddlepaddle==3.2.2 (avoiding 3.3.0 bug).

  pip install paddlepaddle==3.2.2 paddleocr.
  

• Formula (Pix2Text):

  pip install pix2text onnxruntime-gpu.
  

• Background Removal (RMBG): pip install onnxruntime modelscope then run python scripts/setup_rmbg.py.

Phase 3: Configuration & Troubleshooting

1. Final Configuration

Copy the example config and adjust the asset paths:

cp config/config.yaml.example config/config.yaml

Edit config.yaml to ensure sam3.checkpoint_path and sam3.bpe_path match your models/ locations.

Checklist:

• Config files copied and model paths set in config.yaml
• SAM3 weights (sam3.pt) and BPE vocab placed under models/
• Extracted SAM3 library via scripts/setup_sam3.sh Tesseract or PaddleOCR installed

Common Issues:

• "no kernel image is available...": GPU arch mismatch. Upgrade PyTorch or set `s