- Question #25: What the F*ck is Alpha?
Question #25: What is alpha? Answer #25: Yet another dumb f*cking Greek glyph label that a math nerd arbitrarily decided […]
- Question #24: How the F*ck Do We Move a Red Pixel Down and Block Another Pixel’s Emission?
Question #24: How can we move the red pixel from Question #23 down and block the green pixel? To answer […]
- Question #23: How the F*ck Do We Move a Red Pixel Down Over Another Colour?
We’ve been talking about “pixels” in terms of little squares that can emit light. I’d like to point out that […]
- Question #22: How the F*ck do we Move a Red Pixel?
In the last post, we took a very high level peek at what might happen in a code value to […]
- Question #21: How the F*ck do we Put a Red Pixel on the Screen?
If you’ve been following this series of questions, you are probably genuinely wondering why the hell we have taken an […]
- Question #20: What the F*ck is a Quantity of Light?
We’ve been talking about radiometric light units here, specifically regarding the final output from a display. In an effort to […]
- Question #19: What the F*ck is a “Gamut”?
Phew. It’s been a long time coming, but the time we have invested is starting to pay off! We can […]
- Question #18: What the F*ck is the Missing Axis in a Chromaticity Diagram?
We’ve touched on the importance of the CIE’s chromaticity model, and its relationship to visible light spectra as the single […]
- Question #17: What the F*ck is a Colour Space?
Sixteen questions! It has taken us sixteen questions to even begin to describe the term “Colour Space” with any degree […]
- Question #16: What the F*ck is the Triangle Thingy in the Chromaticity Diagram?
Recall back to Question #13 where we explored how chromaticities are discussed. You may have wondered where that triangle went, […]
- Question #15: What the F*ck is “Perceptually Uniform”?
We have laid some tremendously important groundwork in the most recent questions. Within that, even if you have seen or […]
- Question #14: What the F*ck is “White”?
Phew. It’s been quite a few questions to be able to finally, just about, almost, kinda, sorta discuss what is […]
- Question #13: What the F*ck is a Chromaticity?
Another big word for someone who likely only wants to focus on painting on their iPad Pro. The bad news […]
- Question #12: How the F*ck Can We Talk About Light “Intensity”?
Brighter? Lighter? More light? Less light? Where the hell does physics and energy fit into all of this? Arrgh. If […]
- Question #11: How the F*ck Can We Talk About “Colour”?
Given we’ve hit a milestone in that we are approaching the teens in our question count, the time has come […]
- Question #10: Why the F*ck Do We Bother With Linear and Nonlinear Encodings At All?
Hard to believe we’ve hit Question #10. Hopefully you are all finding the series useful. Nothing is more valuable than […]
- Question #9: Why the F*ck is Linear Light Important for a Digital Artist?
In our last question, we took a quick dive into discussing what a particular type of linear, display linear, is […]
- Question #8: What the F*ck Type of “Linear” Have We Been Assuming?
I’m going to spoil our trend of not answering questions with an actual answer, that is somewhat not-too-secretly buried it […]
- Question #7: What the F*ck Does “Linear” Mean?
This is perhaps one of the most ugly questions we are going to tackle, and I’ll warn you up front, […]
- Question #6: What the F*ck is a Transfer Function?
Whoa. There’s a term that you probably haven’t bumped into before, eh? You’ve been pushing pixels for how long, and […]
- Question #5: What the F*ck does 0.5 mean?
Continuing along the analogy of mixing paints, the colours of the paints matter. If we ask two people to pick […]
- Question #4: What the F*ck are the Colours of the Three Lights?
Have you ever taken a random set of paints and started mixing them? If you have, you probably have realized […]
- Question #3: Does the F*cking Colour of the Light Change When We Increase or Decrease the Quantity of Light?
With the first couple of questions out of the way, we have a concrete, albeit simplified, understanding as to what […]
- Question #2: What the F*ck Does 0.6 Mean?
As we learned through our entry question #1, changing the value of an RGB slider changes the intensity of light […]
- Question #1: What the F*ck Happens When We Change an RGB Slider Value?
For reasons that are still somewhat alien and strange to me, I get weekly emails reaching out from digital image […]
2 replies on “The Hitchhiker's Guide to Digital Colour”
Hello there!
This content is Truly wonderful.
I had some muddy understanding of how a color is handled digitally. finding proper, non bullsh*t explanation is quiet a quest.
thanks for the hard work, I hope to read more of it soon.
PS: reading the lasts couple of posts I had cold sweat running down my spine, thinking about how of P3 display would “stretch” sRGB code value instead of using an intermediary transfer function when decoding my favorite cats pictures… is it what is happening??? are we doomed?!?!?
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Welcome Charlie, and thanks for the kind words.
Regarding your horror, you have about nailed it. The good news is that one operating system is properly colour managed. The bad news is that the others are not.
On one operating system, almost all items are managed. On the others, it varies software to software. That means you can indeed expect the sRGB values to simply be blasted out “as is” or wrongly frequently.
And remember, transfer functions only control the intensity of light. They can’t change the chromaticities of the lights, which requires a different form of a transform. In fact, Apple’s Display P3 colour space uses the exact same transfer function as sRGB! So transfer functions along can’t fix things!
It’s great to see folks with enough foundational concepts to arrive at their own inferences. That’s amazing!
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