protan

Simulate protanopia (red-blind) color vision — the color, or a whole image, as a protanopia viewer sees it. A typed shortcut over cvdsim: every call is cvdsim's with the deficiency fixed to protan.

pip install protan          # color only
pip install "protan[image]" # + image recoloring

import protan
protan.simulate("#d7191c")            # that red as protanopia sees it
from PIL import Image
protan.simulate_image(Image.open("chart.png")).save("chart-protan.png")

• simulate(color, severity=1.0) → hex, as protanopia sees it.
• simulate_image(image, severity=1.0) → a recolored PIL Image (path or Image in).

Built on the published method: https://doi.org/10.5281/zenodo.21310578 · Screening/design aid, not a clinical tool.

Licence

MIT.