Grain Splitter

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License

Grain Splitter is a desktop tool for detecting and splitting large film scan sheets, including Hasselblad FFF workflows. It is built with Python and Tkinter, and is designed for high-resolution scans that need both automatic detection and manual correction.

Highlights

• Directly opens FFF, TIFF, TIF, JPG, PNG, BMP, and WEBP files.
• Uses asynchronous first-open loading and a low-resolution preview path for very large scans.
• Automatically detects strips, frame boundaries, and scan orientation.
• Supports zoom, pan, preview navigation, manual guide edits, and box-level edits after rotation.
• Supports multi-image browsing, Export Current, and Export All.
• Lets users adjust JPEG, PNG, and TIFF export compression settings.
• Includes built-in UI languages: English, Simplified Chinese, and German.

Supported Workflows

Input Formats

• FFF
• TIFF / TIF
• JPG / JPEG
• PNG
• BMP
• WEBP

Output Formats

• Original format when possible
• JPG
• PNG
• TIFF

Documentation

• Documentation Index
• Installation Guide
• ART User Commands Guide

Requirements

• Python 3.10 or newer is recommended.
• tkinter is included in most Windows and macOS Python installers.
• On Linux, you may need to install the system Tk package separately before running the app.

Repository Layout

.
├── app/          # GUI, preview canvas, settings, and UI logic
├── core/         # Image loading, detection, export, and shared constants
├── docs/         # User-facing documentation
├── i18n/         # UI language files
├── config/       # Default settings and local user settings
├── main.py       # Main entry point
└── neg_splitter.py