Talk:HSL color space

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I corrected the green hsv values in the example part, as they were totally wrong in my eyes. --Abdull 22:32, 20 Mar 2005 (UTC)

1 More intuitive, etc.
2 HLS v. HSL
3 HSL vs HSI
4 HSL saturation formula?
5 RGB to HSL formula && Accuracy Tag
6 HSL to RGB?
7 HSL Color Sphere

[edit] More intuitive, etc.

As an artist, I find prefer the HSV space. I do not think the HSL is better or "more intuitive." Besides, intuiton can be wrong. Very light colors are not highly saturated! If the claim that HSL is better for artists is to remain, add some weasel words or quote someone.

[edit] HLS v. HSL

The title of this article is "HLS color space" but the content of the aticle uses HSL almost exculsively. Should this article be retitled to "HSL color space"? Given the similarities between the HSV colorspace and this colorspace, it seems like HSL is the more natural ordering of Hue, Saturation and Lightness.

Google shows more hits for HLS (79k vs. 65k) but it's almost even. I guess I don't see that it matters either way... Cburnett 17:02, 22 Mar 2005 (UTC)

I have myself never seen HLS used in that order in any application. --SuperBleda 14:59, 5 March 2006 (UTC)

[edit] HSL vs HSI

I can't find any difference between HSL and HSI, except the name of the axis. I'm redirecting HSI color space here. --minghong 09:26, 8 May 2005 (UTC)

They are not synonymous terms and there is a difference. HSL is a double cone from white to black; HSI is a since come from white at the peak. For example, see [1]. Cburnett 15:52, May 8, 2005 (UTC)

What I found is that both are double core. For both L and I, 0% is black and 100% is white [2] [3]. Am I wrong? It doesn't really matter which color is the "peak", right? The figure in your example is just flipped. --minghong 18:28, 8 May 2005 (UTC)

HSI is a single (the above "since" is a typo) cone. White is at the peak and black is at the center of the base (zero saturation of color with zero intensity = black; full itensity has no color so it is a single peak at white). Cburnett 04:30, May 9, 2005 (UTC)

No. HSI is double cone. It appears as double cone from what I've learnt, and numerous web references shows that it is a double cone just like HSL [4] [5] [6]. --minghong 05:23, 9 May 2005 (UTC)

[edit] HSL saturation formula?

According to the EasyRGB.com link at the bottom of this article (and several other sites) the HSL/HLS saturation is not ( 1 − min{R,G,B} ) but is based on the hexcone. I'd change it but I'm new to posting. :) --Kshakir 04:45, 2 September 2005 (UTC)

[edit] RGB to HSL formula && Accuracy Tag

Didn't work for me. What happens if L = 0? You get an impossibility. That can't be right (Bjorn Tipling 07:29, 29 March 2006 (UTC))

I fixed the formulas according to 'Fundamentals of Interactive Computer Graphics' by Foley and van Dam (see also [7]). Basically, MIN=MAX means the colour is grey, in which case H and S have no meaning, and L contains the shade of grey used. I am relatively new to wikipedia; does this mean the accuracy tag can be removed? -- Jan David Mol

Yes you can remove the edit tag or edit whatever you like or even add your own tags when you feel it's necessary (Here's a list of templates/tags). Thank you for contributing! It makes a lot more sense now. I have removed the tag. Also you may find it easier to sign your signatures by using (~~~~) This will generate an automated signature that other editors and click and be able to talk to you using your talk page and see your personal information page. (Bjorn Tipling 02:23, 30 March 2006 (UTC))

I fixed the formula so the first case for S is L==0, this came up when I implemented the function as code. If max==min then the result of the S math is 0 because the numerator of the fractions is zero so the special case shown before is meaningless. It is true that if you restrict yourself to >= 0 for the colors, then the only case where L==0 is also a case where max==min, but most other max==min cases will work in the other statements, and if you allow signed colors there are sets that will divide by zero when max != min.

[edit] HSL to RGB?

What is the method used for converting HSL to RGB? I would like to know. --Zemyla^t 19:43, 28 May 2006 (UTC)

[edit] HSL Color Sphere

I added an image of the HSL scheme mapped to a sphere. Though I think the image self-explanatory, I would appreciate it if someone were to add a description.SharkD 07:33, 20 October 2006 (UTC)