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triangle de désaturation

English translation: desaturation triangle


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09:17 Sep 9, 2011
French to English translations [PRO]
Science - Science (general) / Colours
French term or phrase: triangle de désaturation
CONTEXT:

"Un axe vertical noir blanc, appelé échelle des gris, représente les tons neutres. Toute droite perpendiculaire à cet axe présente des tons isophanes (de même clarté). Toute droite parallèle à cet axe vertical noir blanc affiche des tons isosaturés (d'égale saturation). Les échantillons de laine nouvellement codés sont présentés sur chaque page de tonalité en un triangle de désaturation où chaque ton pur de 100% de chroma est placé au niveau du gris d'égale luminosité."

http://perso.ensad.fr/~longa/Nimes1.html

No Google hits whatsoever for "desaturation triangle". What can it be? TIA.
FlyHi
Local time: 23:39
English translation:desaturation triangle
Explanation:
where had the "de" gone

Routledge Technical: désaturation = desaturation
Selected response from:

MartinPorto
Portugal
Local time: 22:39
Grading comment
Thx.
4 KudoZ points were awarded for this answer



Summary of answers provided
4 +2desaturation triangle
MartinPorto
3 +1saturation triangleliz askew
3 -1chromacity diagram
claude-andrew


Discussion entries: 4





  

Answers


1 hr   confidence: Answerer confidence 4/5Answerer confidence 4/5 peer agreement (net): +2
desaturation triangle


Explanation:
where had the "de" gone

Routledge Technical: désaturation = desaturation

MartinPorto
Portugal
Local time: 22:39
Native speaker of: Native in EnglishEnglish
PRO pts in category: 4
Grading comment
Thx.

Peer comments on this answer (and responses from the answerer)
neutral  Nikki Scott-Despaigne: I have not found any trace of the existence of a DEsaturation trianlge. It looks very much like a typo or an invented term! If you have references then I'd be happy to stand corrected. // Desaturation exists, but I find nothing on "desaturation triangle".
15 mins
  -> As above the Routledge Technical, and the Shorter Oxford Dictionaries both show the word Desaturation
agree  Marian Vieyra: desaturation (diːˌsætʃəˈreɪʃən) — n physics the addition of white light to a pure colour to produce a paler less saturated colour
2 days22 hrs
agree  Tony M: I think it is probably an invented term, but a perfectly valid and comprehensible one
2 days22 hrs
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5 hrs   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): -1
chromacity diagram


Explanation:
Not an expert, but have a look at the two refs It looks as though it's this.


    Reference: http://physiquelumiere.canalblog.com/archives/2010/10/22/193...
    Reference: http://www.ecse.rpi.edu/~schubert/Light-Emitting-Diodes-dot-...
claude-andrew
France
Local time: 23:39
Works in field
Native speaker of: Native in EnglishEnglish

Peer comments on this answer (and responses from the answerer)
disagree  Tony M: It should be 'chromaticity', but in any case, I'm afraid this term is (properly, at any rate!) used to refer to something very specific, not quite the same as is being described here.
2 days18 hrs
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18 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +1
saturation triangle


Explanation:
my bet is that this is a typo, however I have not translated your entire text, but you should be able to judge from the general context

http://cwcaribbean.aoml.noaa.gov/bilko/intro3.html

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Note added at 1 hr (2011-09-09 10:23:31 GMT)
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or
incorporate

in descending order

HSL Color Schemer - color scheme by HSL to HEX color palette ...
www.workwithcolor.com/hsl-color-schemer-01.htm
Calculates hue values in ascending order from the chosen color by input distance. ... Calculates saturation values for the chosen color in descending order by ...

sorry
have no more time for this one!

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Note added at 3 days20 mins (2011-09-12 09:37:51 GMT)
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something else

Colorfulness - Wikipedia, the free encyclopedia
en.wikipedia.org/wiki/Colorfulness - Cached
In colorimetry and color theory, colorfulness, chroma, and saturation are related but distinct ... To desaturate a color of given intensity in a subtractive system (such as watercolor), one can add white, .... The Focal Encyclopedia of Photography. ...

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Note added at 3 days22 mins (2011-09-12 09:39:39 GMT)
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http://www.optics4kids.org/Home/TeachersParents/Articles/The...

liz askew
United Kingdom
Local time: 22:39
Works in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 4

Peer comments on this answer (and responses from the answerer)
neutral  Tony M: I don't think for a moment that it's a typo, it's just that they seem to have a special way of looking at it; note that it starts from 100% saturation, and so must go down from there, hence why 'desaturation' is logical (if not widespread!)
8 mins
  -> OK! hadn't really looked at that. So "desaturation triangle", particularly if "saturation triangle" exists.
agree  Nikki Scott-Despaigne: I would tend to agree with Liz here. Cf. http://en.wikipedia.org/wiki/HSL_and_HSV at "basic Principles", ref decrease in saturation. Check with client whether a typo "triangle DE saturation", a neologism ("désaturation") or if they mean decrease in sat°.
1 hr
  -> Thank you! My response was evidence-based, what else can I do ?
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