FairScan

FairScan is an Android app to scan documents. It aims to be simple and respectful to users.

"Simple" means that users should get a clean PDF in seconds and without thinking:

• The user interface should be super clear, with no distractions.
• The scanning process should be obvious.
• The app should automatically handle all image processing and PDF generation tasks.

Get FairScan

• F-Droid
• Google Play
• GitHub releases

See also:

• fairscan.org
• the blog

Screenshots

1. Scan	2. Preview	3. Save & Share

Features

• Automatic document detection (using a custom image segmentation model)
• Automatic perspective correction
• Automatic image enhancement

Compatibility

FairScan should be compatible with all devices that:

• run Android 8.0 or a more recent version
• have a camera

Privacy

• All data stays on the device. As of today, FairScan does not access the internet.
• Minimal permissions:
  • Camera
  • WRITE_EXTERNAL_STORAGE: only on Android 8 and 9 to save generated PDFs in the Download directory.
• Zero trackers.

Main dependencies

• Jetpack Compose for the user interface
• CameraX to capture images from the camera
• LiteRT to run the segmentation model for automatic document detection
• OpenCV for:
  • perspective correction
  • image enhancement
• PDFBox-Android for PDF generation

Kudos to the developers of those projects!

Build

To build an APK:

./gradlew clean check assembleRelease

To build an Android App Bundle:

./gradlew clean check :app:bundleRelease

Note on the segmentation model

The builds automatically downloads the segmentation model from fairscan-segmentation-model. This is done in download-tflite.gradle.kts.

License

This project is licensed under the GNU GPLv3. See LICENSE for details.