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The name of this article is currently "CIE L*u*v* color space." I feel it would be better to base the name on one of the two names sanctioned by the CIE, which I believe to be either "CIE 1976 L*, u*, v* space," or "CIELUV". Lovibond 19:18, 18 May 2007 (UTC)
I don't really know too much about the subject, but I just directed a link here from color temperature about the CIE 1976 u'v' chromaticity diagram, which seems like it would fit in reasonably well on this article. Maybe it would also be a good idea to put something about the CIE 1960 uv chromaticity diagram in the history section? -- jacobolus (t) 00:45, 15 October 2007 (UTC)
What are the smallest and what are the biggest values for L, u and v? —Preceding unsigned comment added by 139.18.202.33 ( talk) 13:03, 4 December 2007 (UTC)
Is there any reason why the inverse formula for X is written as it is? It can be simplified: Hpablo ( talk) 22:26, 4 February 2008 (UTC)
I'm very active in the German colorimetry section and I'm working on 3D-animations of the optimal color bodies for all color spaces. It's no problem to put them here too, with English captions. The animations show rotations around the color spaces. The spaces themselves are cut into slices in regular lightness steps from 5% to 95% to optimally show the change of shape with lightness. Here's an old example I made during the development of the slicing algorithm: http://www.albedo-cg.de/CIE/Yxy_lightness.gif For up to date animations check my German user dicussion page every few days: http://de.wikipedia.org/wiki/Benutzer_Diskussion:Al%27be:do. The calculation process itself is quite time consuming, so the completion will take some time. But the results are very rewarding. Spaces I'working on:
-- Albedoshader ( talk) 11:42, 12 March 2008 (UTC)
I think the article lacks a strong relation to the Adams chromatic valence concept, as it's claimed in the preface section. For example, look at the Hunter Lab which is clearly expressed in terms of Adams theory. Not only we see that Hunter Lab is UCS-based and luma-scaled, but that it also implies opponent process, which is not the case with CIELUV.
In fact, the referenced book “Color appearance models” by Fairchild in section 10.5 explicitly blames CIELUV for using subtractive shift to reference white rather than pseudo von Kries chromatic adaptation by XYZ-normalization, which is involved in CIELAB. May be I am missing something here, but no simple explanation pops up for CIELUV becoming an opponent process model. Of course, u'v' scales somehow resemble “green-red” and “blue-yellow”, but isn't it just a coincidence? I've never met any mentioning that UCS was designed with opponent process in mind, even if it was intended just to mimic it rather that to fully implement.
213.234.235.82 ( talk) 15:09, 19 June 2008 (UTC)
I've reverted an edit that had identified C* and h as chroma and hue correlations; the previous version identified them as correlates. The latter is consistent with customary and accepted practice. Lovibond ( talk) 17:29, 28 April 2009 (UTC)
The link to chroma under Cylindrical representation currently takes the reader to a disambiguation page. I don't know enough about the subject to make the link more specific, but I'd think that one of colorfulness, chrominance, or Munsell_color_system#Chroma would be the right target. Scott Pakin ( talk) 18:06, 25 July 2010 (UTC)
The transformations reference Y_n but it is never explained what this variable is. Can someone remedy that? Is it the Y tristimulus component of an XYZ white point (e.g. D65's Y=100.00?). Thanks! 174.252.49.198 ( talk) 20:26, 3 November 2010 (UTC)
In the line "The cylindrical version of CIELUV is known as CIE LChuv, where C*uv is the chroma and huv is the hue:[6]", doesn't the h miss a "*"? I don't have access to the original citation. — Preceding unsigned comment added by OxygenBlue ( talk • contribs) 20:41, 19 May 2013 (UTC)
HCL currently consists of two halves: an un-notable crappy color space from 2005 (Sarifuddin) and a synonym for LCh(uv) that the statistics people just happened to come up with. It would probably be a good idea to do away with the 2005 color space and merge the rest here. Since it is more or less end-user information, some twisting of the sections will be needed.-- Artoria 2e5 🌉 03:52, 24 May 2019 (UTC)
I'm one of the "statistics people" that have been popularizing the usage of HCL for data visualization tasks. I cannot competently say much about the Sarifuddin version because I had never heard of it and it does not seem to be widely known in statistics/data visualization. As for the proposal to merge the CIELUV and HCL pages: I think it would be feasible but necessitate a longer section on the cylindrical HCL representation and how this is useful for deriving color palettes for data visualization. Alternatively, the latter could also remain a separate page (with or without the inclusion of the Sarifuddin space) which includes quite a few references, links to software, and supporting web pages. --Achim Zeileis 23:13, 15 July 2019 (UTC) — Preceding unsigned comment added by Zeileis ( talk • contribs)
This
level-5 vital article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
The name of this article is currently "CIE L*u*v* color space." I feel it would be better to base the name on one of the two names sanctioned by the CIE, which I believe to be either "CIE 1976 L*, u*, v* space," or "CIELUV". Lovibond 19:18, 18 May 2007 (UTC)
I don't really know too much about the subject, but I just directed a link here from color temperature about the CIE 1976 u'v' chromaticity diagram, which seems like it would fit in reasonably well on this article. Maybe it would also be a good idea to put something about the CIE 1960 uv chromaticity diagram in the history section? -- jacobolus (t) 00:45, 15 October 2007 (UTC)
What are the smallest and what are the biggest values for L, u and v? —Preceding unsigned comment added by 139.18.202.33 ( talk) 13:03, 4 December 2007 (UTC)
Is there any reason why the inverse formula for X is written as it is? It can be simplified: Hpablo ( talk) 22:26, 4 February 2008 (UTC)
I'm very active in the German colorimetry section and I'm working on 3D-animations of the optimal color bodies for all color spaces. It's no problem to put them here too, with English captions. The animations show rotations around the color spaces. The spaces themselves are cut into slices in regular lightness steps from 5% to 95% to optimally show the change of shape with lightness. Here's an old example I made during the development of the slicing algorithm: http://www.albedo-cg.de/CIE/Yxy_lightness.gif For up to date animations check my German user dicussion page every few days: http://de.wikipedia.org/wiki/Benutzer_Diskussion:Al%27be:do. The calculation process itself is quite time consuming, so the completion will take some time. But the results are very rewarding. Spaces I'working on:
-- Albedoshader ( talk) 11:42, 12 March 2008 (UTC)
I think the article lacks a strong relation to the Adams chromatic valence concept, as it's claimed in the preface section. For example, look at the Hunter Lab which is clearly expressed in terms of Adams theory. Not only we see that Hunter Lab is UCS-based and luma-scaled, but that it also implies opponent process, which is not the case with CIELUV.
In fact, the referenced book “Color appearance models” by Fairchild in section 10.5 explicitly blames CIELUV for using subtractive shift to reference white rather than pseudo von Kries chromatic adaptation by XYZ-normalization, which is involved in CIELAB. May be I am missing something here, but no simple explanation pops up for CIELUV becoming an opponent process model. Of course, u'v' scales somehow resemble “green-red” and “blue-yellow”, but isn't it just a coincidence? I've never met any mentioning that UCS was designed with opponent process in mind, even if it was intended just to mimic it rather that to fully implement.
213.234.235.82 ( talk) 15:09, 19 June 2008 (UTC)
I've reverted an edit that had identified C* and h as chroma and hue correlations; the previous version identified them as correlates. The latter is consistent with customary and accepted practice. Lovibond ( talk) 17:29, 28 April 2009 (UTC)
The link to chroma under Cylindrical representation currently takes the reader to a disambiguation page. I don't know enough about the subject to make the link more specific, but I'd think that one of colorfulness, chrominance, or Munsell_color_system#Chroma would be the right target. Scott Pakin ( talk) 18:06, 25 July 2010 (UTC)
The transformations reference Y_n but it is never explained what this variable is. Can someone remedy that? Is it the Y tristimulus component of an XYZ white point (e.g. D65's Y=100.00?). Thanks! 174.252.49.198 ( talk) 20:26, 3 November 2010 (UTC)
In the line "The cylindrical version of CIELUV is known as CIE LChuv, where C*uv is the chroma and huv is the hue:[6]", doesn't the h miss a "*"? I don't have access to the original citation. — Preceding unsigned comment added by OxygenBlue ( talk • contribs) 20:41, 19 May 2013 (UTC)
HCL currently consists of two halves: an un-notable crappy color space from 2005 (Sarifuddin) and a synonym for LCh(uv) that the statistics people just happened to come up with. It would probably be a good idea to do away with the 2005 color space and merge the rest here. Since it is more or less end-user information, some twisting of the sections will be needed.-- Artoria 2e5 🌉 03:52, 24 May 2019 (UTC)
I'm one of the "statistics people" that have been popularizing the usage of HCL for data visualization tasks. I cannot competently say much about the Sarifuddin version because I had never heard of it and it does not seem to be widely known in statistics/data visualization. As for the proposal to merge the CIELUV and HCL pages: I think it would be feasible but necessitate a longer section on the cylindrical HCL representation and how this is useful for deriving color palettes for data visualization. Alternatively, the latter could also remain a separate page (with or without the inclusion of the Sarifuddin space) which includes quite a few references, links to software, and supporting web pages. --Achim Zeileis 23:13, 15 July 2019 (UTC) — Preceding unsigned comment added by Zeileis ( talk • contribs)