Digital Color Mixing Solved (Perhaps) by 1930s Math #ArtTuesday

Here’s something you might not know if you aren’t a digital artist: digital color mixing in programs like Photoshop doesn’t work the way colors are expected to given conventional color theory. Colors in both paint and light mix in a way that digital tools have not been able to replicate. Until now. Maybe. Here’s more from Hackaday:

There’s actually been a mathematical model for the behavior of mixed paints since 1931 – the Kubelka-Munk (K-M) equations. Computer graphics researchers have known about it for decades, but it’s never widely been implemented in commercial software. That’s because implementing it would require tracking multiple pigment channels for every pixel instead of just three channels to cover red, green, and blue values. That was a particular deal-breaker in the early days of computing, but it remains a hurdle to this day. Most art software still relies on graphics pipelines built entirely around RGB…. The breakthrough came when researchers realized they could knit the principles of the K-M model into the RGB space. Their hack works by decomposing RGB colors into a combination of four basic pigments.

See and learn more!


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