POV-Ray : Newsgroups : povray.binaries.animations : CIELCHuv D65 gamut sphere Server Time
17 Jul 2024 12:23:25 EDT (-0400)
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From: Mike Horvath
Subject: Re: CIELCHuv D65 gamut sphere
Date: 25 Mar 2017 18:24:05
Message: <58d6ee05$1@news.povray.org>
On 3/25/2017 6:14 PM, clipka wrote:
> No, it's the HSL model's definition of "Saturation" in general that I
> find counter-intuitive, not your visual representations of the HSL
> colour solids.
>

This article explains several definitions/methods to convert "chroma" to 
"saturation".

https://en.wikipedia.org/wiki/HSL_and_HSV

Not sure if one of these methods is good to use, or if CIELCHab & 
CIELCHuv need something custom tailored for them. (Which is beyond me.)


Mike


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From: Jörg "Yadgar" Bleimann
Subject: Re: CIELCHuv D65 gamut sphere
Date: 28 Mar 2017 14:27:10
Message: <58daaafe$1@news.povray.org>
Hi(gh)!

On 25.03.2017 09:19, Mike Horvath wrote:
> The visible gamut under D65 illumination mapped to spherical CIELCHuv
> coordinates.

Sweet! May I C64ize/AtariSTize and re-publish it (of course crediting you)?

See you in Khyberspace!

Yadgar


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From: Mike Horvath
Subject: Re: CIELCHuv D65 gamut sphere
Date: 28 Mar 2017 23:13:04
Message: <58db2640$1@news.povray.org>
On 3/28/2017 2:27 PM, Jörg "Yadgar" Bleimann wrote:
> Hi(gh)!
>
> On 25.03.2017 09:19, Mike Horvath wrote:
>> The visible gamut under D65 illumination mapped to spherical CIELCHuv
>> coordinates.
>
> Sweet! May I C64ize/AtariSTize and re-publish it (of course crediting you)?
>
> See you in Khyberspace!
>
> Yadgar

You may. But as clipka has pointed out, in its current form it is not 
useful to anyone at all and should be forgotten.


Mike


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From: Mike Horvath
Subject: Re: CIELCHuv D65 gamut sphere
Date: 28 Mar 2017 23:51:53
Message: <58db2f59$1@news.povray.org>
There are some nicer animations here:

https://commons.wikimedia.org/wiki/User:SharkD

such as one of these:

https://commons.wikimedia.org/wiki/File:Visible_gamut_within_CIELUV_color_space_D65_whitepoint_mesh.webm
https://commons.wikimedia.org/wiki/File:Visible_gamut_within_CIELCHuv_color_space_D65_whitepoint_mesh.webm

I can provide the individual uncompressed frames of the animation if needed.


Mike


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From: Mike Horvath
Subject: Re: CIELCHuv D65 gamut sphere
Date: 29 Mar 2017 00:35:06
Message: <58db397a$1@news.povray.org>
On 3/28/2017 2:27 PM, Jörg "Yadgar" Bleimann wrote:
> Hi(gh)!
>
> On 25.03.2017 09:19, Mike Horvath wrote:
>> The visible gamut under D65 illumination mapped to spherical CIELCHuv
>> coordinates.
>
> Sweet! May I C64ize/AtariSTize and re-publish it (of course crediting you)?
>
> See you in Khyberspace!
>
> Yadgar


Here's a nice animation too, though I can only claim partial credit.

https://commons.wikimedia.org/wiki/File:Pyramid_35_spheres.gif


Mike


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From: Mike Horvath
Subject: Re: CIELCHuv D65 gamut sphere
Date: 29 Mar 2017 02:04:14
Message: <58db4e5e@news.povray.org>
On 3/29/2017 12:35 AM, Mike Horvath wrote:
> Here's a nice animation too, though I can only claim partial credit.
>
> https://commons.wikimedia.org/wiki/File:Pyramid_35_spheres.gif
>
>
> Mike

ONCE AGAIN, I can only claim partial credit, rather.

;)


Mike


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