Questions tagged [colorspace]

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2answers
56 views

Does CIE XYZ preserve spectral accuracy when used for progressive rendering?

How accurate it is to estimate rendering equation using wavelengths and then convert result to CIE XYZ to accumulate samples temporally by averaging them over time?
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0answers
18 views

Using the HTML canvas and colors to track objects

I need to rewrite a short utility library, to get it working with the Brave browser (My actual question isn't about brave per se.) canvas-color-tracker - example of it being used and src/index.js is ...
0
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2answers
50 views

What is the name of this moving color pixels effect, for animating a painting?

https://superrare.co/artwork-v2/spring-22267 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 ...
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1answer
50 views

Luminace, RGB, and SMPT ST 2084 EOTF

I need a point clarified. According to wikipedia, SMPT ST 2084 EOTF is this: I've seen this equation implemented in game engines where for L they feed the channels RGB, each of which is 0 to 10,000 ...
2
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3answers
744 views

Why is there a difference between the CIE XYZ colour gamut vs CIE RGB?

Yet another question about colour space... In my research on CIE XYZ system, I found that it is based on the CIE RGB colour matching experiments, and that because the RGB system needed occasional ...
0
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2answers
65 views

What is the relation between colour spaces and what is actually displayed on our screens?

I am not entirely sure that this is the right stack exchange, but I couldn't find any other suitable one - please redirect me if necessary. There exists mathematically defined colour spaces which help ...
2
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1answer
485 views

How to convert from XYZ or sRGB to ACEScg/AP1

I'm confused about how to properly convert from sRGB or XYZ color space to ACEScg. Specifically whether I have to account for differences in white point explicitly. The aces github page gives the ...
1
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0answers
54 views

Interpolating HSV color with black

I'm interpolating RGB values by transforming them into HSV space and then back into RGB. I have trouble figuring out how to achieve ...
2
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0answers
81 views

What is the CMYK color profile used by pantone.com

Pantone spot colors are specified in the RGB and CMYK color models on the https://pantone.com website. For example, the Pantone 122 spot color as it appears when printed on coated paper is specified ...
6
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1answer
3k views

How do I calculate average hue, since the numbers loop around?

If I calculate the average (mean) hue of a set of colours naively, I will get silly answers sometimes. For example, in HSB/HSL, the average of hue=10 (slightly orange red) and hue=350 (slightly blue ...
3
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1answer
818 views

Alpha blending in linear colour space

I've been making a simple game in OpenGL, and implemented a screen fade-out using the old 'draw a black fullscreen quad and ramp up the alpha' trick. I'm doing all my shaders in linear space and using ...