bjornornorn

5 ms·

1.
Island Architect: Townscaper-Inspired City Builder on Custom Engine(80.lv)
1 points by bjornornorn 1y ago|0 comments
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New alternatives to HSL and HSV that better match color perception(bottosson.github.io)
398 points by bjornornorn 5y ago|79 comments
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by bjornornorn 5y ago
For color picking, I have just released two new color spaces based on Oklab, trying to improve on HSV and HSL. You can try them and compare with other options here: https://bottosson.github.io/misc/colorpicker/
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Interactive Color Picker Comparison(bottosson.github.io)
2 points by bjornornorn 5y ago|0 comments
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by bjornornorn 6y ago
Just a small correction: Logarithmic != gamma encoded. Most software use sRGB encoding which is close to a power function (often referred to as a gamma function). Logarithmic encoding is often used for encoding HDR images, but is not what
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SRGB gamut clipping – a better alternative to clipping RGB values(bottosson.github.io)
3 points by bjornornorn 6y ago|0 comments
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by bjornornorn 6y ago
Thanks a lot for the kind words!
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by bjornornorn 6y ago
Yeah, should be similar a lot of the time. Deep blues are the colors that are the most different.
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by bjornornorn 6y ago
Thanks! Regarding: “Cube is beautiful in the sense that it allows scaling the intensity without considerations, but it is quite awful in the near black psychovisual performance.” Yeah, that is the tradeoff, same for dealing with hdr values.
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by bjornornorn 6y ago
Yes, exactly. The results will be more accurate as in closer to perception of light (for rendering for example you would want a linear color space)
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by bjornornorn 6y ago
Nice! Definitely the the type of use case I had in mind.
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by bjornornorn 6y ago
There are a two different CIE LCh color spaces: they are cylindrical samplings of CIELAB and CIELUV, similar to how Oklab can also be sampled with cylindrical coordinates The comparisons with CIELAB and CIELUV are using LCh coordinates. Tha
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by bjornornorn 6y ago
The largest difference is that JzAzBz has been designed to model lightness perception of very bright colors and very dark colors. Depending on your use case this could either be useful or a problem, since it means that you have to be carefu
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by bjornornorn 6y ago
Not that familiar with XYB and its properties. Is there anywhere I can read more? Found some specifications, but not anything on its properties. I think this might be a case where the requirements for image editing and image compression are
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by bjornornorn 6y ago
Yeah, that’s pretty much why I didn’t include it. I haven’t really seen YCrCb used except anywhere for in compression, so didn’t think of including it (an neither do most papers related to perceptual color spaces).
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by bjornornorn 6y ago
That is based on CIELUV, which is one of the spaces tested against in the article. CIELUV is useful because its chromaticity space is a projective transform of XYZ. That also means it doesn't predict perception of hue as well as more c
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by bjornornorn 6y ago
Yeah, both of those are good recommendations! I also think it is useful to focus on understanding the various experiments that have led to the different color models. The most important one is the experiments that led to CIE XYZ. Lecture no
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by bjornornorn 6y ago
Yeah, would be nice. I've been thinking a bit about following up with that. The generated dataset consists of a few thousand colors. The hue dataset is using 15 different hues only. Some more data there could definitely be useful. I th
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by bjornornorn 6y ago
Author here. Wow, thanks a lot! If anyone has any questions feel free to post here and I can try to answer. I have another post that goes into more detail onhow software often gets color wrong: https://bottosson.github.io/po
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by bjornornorn 13y ago
I like to think of this somewhat differently. By using extreme values you are limiting your options. If you use #FFFFFF in a design you can't select a brighter color and you can't select a color with the same brightness that'