AutoLineDigitizer

A desktop application for automatic line chart data extraction using LineFormer with automatic axis detection via ChartDete and EasyOCR.

Demo

Video

AutoLineDigitizerDemo_low.mp4

Note: This demo video shows an earlier Streamlit-based version. The current version uses a Flet-based desktop app with a different UI, but the core functionality is the same.

Input / Output

Input	Output

Export to Digitizer Tools

StarryDigitizer	WebPlotDigitizer

Features

• Line Extraction: Automatic line detection using LineFormer
• Axis Detection: Automatic axis label reading via ChartDete + OCR
• Export Formats:
  • StarryDigitizer ZIP
  • WebPlotDigitizer TAR

Download

Download the latest version from the Releases page.

Platform	File
macOS (Apple Silicon)	AutoLineDigitizer-macOS.zip
Windows	AutoLineDigitizer-Windows.zip

Note: Intel Mac is not currently supported. Apple Silicon (M1/M2/M3/M4) only.

Installation

macOS

1. Download and unzip AutoLineDigitizer-macOS.zip
2. Move AutoLineDigitizer.app to Applications
3. On first launch, macOS will show a warning: "AutoLineDigitizer.app cannot be opened because the developer cannot be verified."
   • Click Cancel (not "Move to Trash")
   • Go to System Settings → Privacy & Security → scroll down and click "Open Anyway"
   • Or: Right-click the app → Open → click Open in the dialog
4. Models will be downloaded automatically on first launch

Windows

1. Download and unzip AutoLineDigitizer-Windows.zip
2. Run AutoLineDigitizer\AutoLineDigitizer.exe
3. Models will be downloaded automatically on first launch

Manual Model Download (Proxy / Firewall environments)

If auto-download fails (e.g., due to a corporate proxy), you can download the models manually via your browser and import them into the app.

Base Models (required)

1. Download iter_3000.pth and checkpoint.pth from GitHub Releases
2. In the app, click Import Models button that appears under the Line Model dropdown
3. Select the downloaded .pth files

Battery Fine-tuned Models (optional)

1. Download the model file from HuggingFace
   • lineformer_battery_iter_5000.pth — Battery (iter_5000)
   • lineformer_battery_best_iter_1300.pth — Battery (best)
2. Select the Battery model from the Line Model dropdown
3. Click the Import Model button that appears
4. Select the downloaded .pth file

---

Image Attribution

Demo images are used under the following licenses:

• demo/10.3390_nano14040384_4i.png: Figure 4(i) from Wang et al., Nanomaterials, 2024, licensed under CC BY 4.0

---

License

This project is licensed under the MIT License - see the LICENSE file for details.

Third-Party Components

• LineFormer: ICDAR 2023 Paper by Jay Lal et al.
• ChartDete: MIT License, Copyright (c) 2023 Pengyu Yan
• MMDetection: Apache License 2.0, Copyright (c) 2018-2023 OpenMMLab