Talk:Oklab color space

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This article misses OKHSV and OKHSL

The only note "However, it is not suitable for image blending or processing, for which the gamma-expanded linear RGB color space is more appropriate." is not completely true. Using OKHSV or OKHSL is way better for many processings.

I'm using OKHSV to blend images using Hue, Saturation or Value, and OKLAB values for blending the L channels. For Retinex I'm using OKHSV. For vibrance OKHSL works better.

See here for OKHSV and OKHSL : https://bottosson.github.io/posts/colorpicker/ Parazythum (talk) 19:24, 31 January 2025 (UTC)[reply]

How exactly are you "blending images using Hue" though? What's the hue between 0 and 359? bungalo (talk) 19:27, 18 February 2025 (UTC)[reply]

OKHSV and OKHSL are probably inappropriate for upscaling and downscaling an image (imagine what would happen to the hue channel when blending a yellow pixel and a blue neighbour pixel, which is at the opposite side of the colour wheel). In any case, such claims should be supported by reliable sources, not personal experiences (original research). --Fernando Trebien (talk) 13:42, 13 March 2025 (UTC)[reply]

What's the LMS transform?

The article says that l,m,s are the result of converting from XYZ to an LMS color space and gives a matrix of coefficients. However, this matrix doesn't match any of the matrices given on the LMS color space page. If so, is it really an LMS color space? Some explanation is needed. bungalo (talk) 19:25, 18 February 2025 (UTC)[reply]

I think that the term "LMS color space" is often used to refer to an arbitrary linear color space with 3 imaginary primaries that can be useful for colorimetric operations. After all, there is only one true LMS color space (and we are really close to it with CIE 2006 LMS, also known as Stockman and Sharpe (2000) LMS). 8-leaf clover (talk) 23:58, 27 February 2025 (UTC)[reply]

Ah, people using the wrong terms again ;)

I changed the text so it doesn't read as if it is the same color space. bungalo (talk) 02:39, 1 March 2025 (UTC)[reply]

Requested move 31 March 2025

The following is a closed discussion of a requested move. Please do not modify it. Subsequent comments should be made in a new section on the talk page. Editors desiring to contest the closing decision should consider a move review after discussing it on the closer's talk page. No further edits should be made to this discussion.

The result of the move request was: not moved. – robertsky (talk) 07:22, 20 April 2025 (UTC)[reply]

Oklab color space → Oklab and Oklch color space – I think Oklch is the more popular one, but I don't think Oklab should be excluded from the tile either. Open for other suggestions, though. PhotographyEdits (talk) 15:38, 31 March 2025 (UTC) — Relisting. TarnishedPath^talk 03:57, 13 April 2025 (UTC)[reply]

Those seem to be two different color spaces, so shouldn't that be Oklab and Oklch color spaces? —⁠ ⁠BarrelProof (talk) 20:52, 31 March 2025 (UTC)[reply]
Makes sense to me. PhotographyEdits (talk) 06:38, 1 April 2025 (UTC)[reply]

Those are two different coordinate systems for a single color space. The underlying color space is the same for both, but Oklab refers to a specific Cartesian coordinate system and Oklch to a cylindrical coordinate system on that same space.

However, I have no opinion on whether the page name should be singular or plural nor on which of these two is more natural to readers. Jey Kottalam (talk) 16:57, 9 April 2025 (UTC)[reply]

The color space is the same. The only difference between the two is the coordinate system. 8-leaf clover (talk) 19:29, 13 April 2025 (UTC)[reply]

Note: WikiProject Color and WikiProject Computer science have been notified of this discussion. TarnishedPath^talk 03:57, 13 April 2025 (UTC)[reply]

I oppose. The fundamental and underlying color space is Oklab. Oklch is a variation of the Oklab color space that uses a a cylindrical coordinate system so that it represents the more psychologically relevant attributes of color of hue, lightness, and chroma. Even if Oklch is more popular (which I don't know for sure), the color space is still Oklab. 8-leaf clover (talk) 19:34, 13 April 2025 (UTC)[reply]

Oppose there’s no reason to make this title wordier. –jacobolus (t) 23:25, 14 April 2025 (UTC)[reply]

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.