A color QR code on a physical medium — it actually reads!

But physical printing (CMYK) usually ruins everything. RGB channels partially bleed and mix, crosstalk starts, and the scanner goes crazy. My approach I've been working on a "spectral response normalization" model. The key isn't the paint or the material, but a color model that mimics RGB logic in a subtractive printing environment. I'll admit: I haven't done a proper paper print yet. Instead, I painted the first prototype with acrylics on canvas. How about that? 😉 The result 3 different links inside one code — and it actually scans! On the website, I used Adaptive Thresholding (Bradley) to handle the visual noise. What I need from you Your thoughts and advice The scanner works great directly from the screen If you're feeling adventurous — try printing the code by matching the colors to my model. There's a paper with details on Zenodo, and I'd be happy to answer any questions This isn't the "invention of the century." Just a passion project to make something interesting. I'd love to h