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Questions tagged [color]

Questions about the visual perceptual property deriving from the spectrum of light, usually expressed numerically according to a color model.

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38 votes
4 answers

Are there common materials that aren't represented well by RGB?

In graphics we use RGB and other color spaces as an approximation to the full spectrum of light wavelengths. This evidently works pretty well in general, but are there any reasonably common objects/...
trichoplax is on Codidact now's user avatar
17 votes
2 answers

Is gamma still important to take into account?

Do different monitors (including mobile screens) still use significantly different gamma functions when displaying colour images? Is there a standardised way to represent colour that can then be ...
trichoplax is on Codidact now's user avatar
9 votes
1 answer

Understanding Jump Flooding Algorithm (JFA) for Voronoi Diagrams

I'm having trouble understanding the JFA. As far as I understood the algorithm, it walks log(n) times through every pixel (no matter if it is a seed or not) and looks at that pixel's neighbors in $(x+...
Muad's user avatar
  • 165
8 votes
2 answers

What is a good color similarity metric?

I have some colors in RGB in [0,1] and want to find a way to rate their similarity, as perceived by a human. I have two ideas in mind, but I am sure there are other options as well, but am unsure ...
Alan Wolfe's user avatar
  • 7,801
7 votes
1 answer

Actual vs Perceived Brightness of RGB Colour

In this video from about 1:15, it is stated that if you have an RGB value of (0.5,0.5,0.5) it is only 22% as bright as (1,1,1) rather than the expected 50% as bright. Does this mean that RGB is ...
Nic Steyn's user avatar
6 votes
1 answer

Is colorized subpixel rendering possible?

Subpixel rendering is used most commonly to anti alias fonts. It works by leveraging the physical layout of the color components of a display to give geometry details to an image that are smaller than ...
Alan Wolfe's user avatar
  • 7,801
2 votes
4 answers

Question about function for color

I would like a help to understand the following line of code: return float3(pow(color.r, 2.2), pow(color.g, 2.2), pow(color.b, 2.2)); I've seen some places calling ...
Matheus Markies's user avatar
0 votes
2 answers

What is the name of this moving color pixels effect, for animating a painting? The artwork in the link seems to be based on a painting of a woman, but effects have been added that assign a pixel to each block of the painting that ...
user610620's user avatar