phaios

φαιός — dusky grey (Aristotle, De Sensu). A dedicated black-and-white RAW developer for the desktop.

phaios converts colour RAW files (NEF, CR2/3, ARW, RAF, DNG) to monochrome using the canonical B&W photographic techniques: standard luminance weights, channel mixing, and coloured-filter simulation. The numerical pipeline is powered by the phaios-core Rust extension.

Quick start

pip install phaios
python -m phaios              # launch the desktop app

Requires Python 3.12+ and a supported platform (Linux x86-64, Windows x86-64, macOS arm64).

Documentation

• Changelog — version history and release notes
• UI spec — component inventory derived from the canonical mockup
• Mockup — canonical interactive UI reference (open in browser)
• Design brief — original brief for the UI design

Development

git clone https://github.com/sdhdez/phaios.git
cd phaios
uv venv .phaios-env && source .phaios-env/bin/activate
uv pip install -r requirements-dev.txt
uv pip install -e .
pytest

Licence

GNU General Public License v3 or later — see LICENSE.