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The article says both The HSL color space was invented in 1938 by Georges Valensi
and computer graphics pioneers at PARC and NYIT developed the HSV model in the mid-1970s, formally described by Alvy Ray Smith[10] in the August 1978 issue of Computer Graphics
.
What does this mean? Is this contradictory, or if not, why? CapnZapp ( talk) 06:56, 16 June 2018 (UTC)
I don't have the expertise to totally fix it but will take out some of the unsourced stuff that looks wrong. North8000 ( talk) 20:50, 13 June 2023 (UTC)
Is there a color space similar to HSL/HSV/HSI such that 0% saturation ignores hue and 100% saturation ignores intensity/lightness/luma/luminosity/value? Notice the bottom of the example: solid yellow.
— Preceding unsigned comment added by Sollyucko ( talk • contribs) 02:54, 5 February 2019 (UTC)
There is a discrepancy in the formula for .
. H is cyclic, so the same results should occur for H=0 and H=360.
, but H'=0 when H=0 and H'=6 when H=360. The six cases for cover ⌈H'⌉ from 1 to 6, but H'=0 yields (0,0,0), but H'=6 is (C,0,X).
When H'=0, you should get the same result when H'=6. — Preceding
unsigned comment added by
Chelmite (
talk •
contribs)
20:28, 8 June 2020 (UTC)
Unless I am missing something, I believe there are issues with the HSI to RGB formulas. The result of the formula C = (3 · I · S) / (1 + Z) can yield values where 0 ≤ C ≤ 3. Values where C + m > 1 are problematic, since this will result in values for R, G, and B that are outside the acceptable range of 0 to 1 (inclusive). Techfan101 ( talk) 16:17, 1 March 2021 (UTC)
It says that HSV represent { "how the object appear under light" / amount of reflected light, by the V value } . This is not true .?
HSV's V behave irrelevantly to light, for some colors . If you use any white light source, you get what HSL's L does . Try to use these 2 values on #49301D . In HSV, after 50% HSL's L, the color still can be made brighter, but in reality, under white light, surface with such color will only reflect more and more white, as in HSL .
For preview,
Irvnriir ( talk) 16:52, 11 March 2021 (UTC)
I'm not a wikipedian, I'm not sure how one would request a rewrite, but the section describing the various conversion formulae has grammatical mistakes and is just in general really hard to read.
-- 71.231.105.84 ( talk) 11:04, 15 April 2022 (UTC)
Is it just me, or are some of the examples wrong? Or maybe they're using some idealized values?
For example, #008000 would have the RGB values of (0,128,0). If you normalize these values, you should get (0.0,0.501,0.0), but in the example it gives much "nicer looking" values of (0.0,0.500,0.0). This affects the downstream calculation as well. So instead of getting HSV of (120.0,1.00,0.502), you get (120.0,1.00,0.500). Certainly a "nicer looking" result, but unless I'm missing something, it's slightly inaccurate.
A couple online calculators seem to give the results I'm expecting (different from the examples on this page). So, what am I missing here?
Justin T Conroy ( talk) 05:52, 26 March 2024 (UTC)
0x00
and 0xFF
. For example,
0xBF
. If instead you treated 191/255 as the canonical value, then the decimal fraction for that is 0.749... –
jacobolus
(t)
16:37, 26 March 2024 (UTC)
![]() | This article is written in American English, which has its own spelling conventions (color, defense, traveled) and some terms that are used in it may be different or absent from other varieties of English. According to the relevant style guide, this should not be changed without broad consensus. |
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||
|
![]() | HSL and HSV received a peer review by Wikipedia editors, which is now archived. It may contain ideas you can use to improve this article. |
|
||||||
This page has archives. Sections older than 180 days may be automatically archived by Lowercase sigmabot III when more than 6 sections are present. |
![]() | This article links to one or more target anchors that no longer exist.
Please help fix the broken anchors. You can remove this template after fixing the problems. |
Reporting errors |
The article says both The HSL color space was invented in 1938 by Georges Valensi
and computer graphics pioneers at PARC and NYIT developed the HSV model in the mid-1970s, formally described by Alvy Ray Smith[10] in the August 1978 issue of Computer Graphics
.
What does this mean? Is this contradictory, or if not, why? CapnZapp ( talk) 06:56, 16 June 2018 (UTC)
I don't have the expertise to totally fix it but will take out some of the unsourced stuff that looks wrong. North8000 ( talk) 20:50, 13 June 2023 (UTC)
Is there a color space similar to HSL/HSV/HSI such that 0% saturation ignores hue and 100% saturation ignores intensity/lightness/luma/luminosity/value? Notice the bottom of the example: solid yellow.
— Preceding unsigned comment added by Sollyucko ( talk • contribs) 02:54, 5 February 2019 (UTC)
There is a discrepancy in the formula for .
. H is cyclic, so the same results should occur for H=0 and H=360.
, but H'=0 when H=0 and H'=6 when H=360. The six cases for cover ⌈H'⌉ from 1 to 6, but H'=0 yields (0,0,0), but H'=6 is (C,0,X).
When H'=0, you should get the same result when H'=6. — Preceding
unsigned comment added by
Chelmite (
talk •
contribs)
20:28, 8 June 2020 (UTC)
Unless I am missing something, I believe there are issues with the HSI to RGB formulas. The result of the formula C = (3 · I · S) / (1 + Z) can yield values where 0 ≤ C ≤ 3. Values where C + m > 1 are problematic, since this will result in values for R, G, and B that are outside the acceptable range of 0 to 1 (inclusive). Techfan101 ( talk) 16:17, 1 March 2021 (UTC)
It says that HSV represent { "how the object appear under light" / amount of reflected light, by the V value } . This is not true .?
HSV's V behave irrelevantly to light, for some colors . If you use any white light source, you get what HSL's L does . Try to use these 2 values on #49301D . In HSV, after 50% HSL's L, the color still can be made brighter, but in reality, under white light, surface with such color will only reflect more and more white, as in HSL .
For preview,
Irvnriir ( talk) 16:52, 11 March 2021 (UTC)
I'm not a wikipedian, I'm not sure how one would request a rewrite, but the section describing the various conversion formulae has grammatical mistakes and is just in general really hard to read.
-- 71.231.105.84 ( talk) 11:04, 15 April 2022 (UTC)
Is it just me, or are some of the examples wrong? Or maybe they're using some idealized values?
For example, #008000 would have the RGB values of (0,128,0). If you normalize these values, you should get (0.0,0.501,0.0), but in the example it gives much "nicer looking" values of (0.0,0.500,0.0). This affects the downstream calculation as well. So instead of getting HSV of (120.0,1.00,0.502), you get (120.0,1.00,0.500). Certainly a "nicer looking" result, but unless I'm missing something, it's slightly inaccurate.
A couple online calculators seem to give the results I'm expecting (different from the examples on this page). So, what am I missing here?
Justin T Conroy ( talk) 05:52, 26 March 2024 (UTC)
0x00
and 0xFF
. For example,
0xBF
. If instead you treated 191/255 as the canonical value, then the decimal fraction for that is 0.749... –
jacobolus
(t)
16:37, 26 March 2024 (UTC)