Fil:CIExy1931 srgb gamut.png
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CIExy1931_srgb_gamut.png (542 × 599 piksler, filstørrelse: 104 KB, MIME-type: image/png)
Beskrivelse
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English: Based on: CIExy1931
As a replacement for an existing image with an unclear copyright status. The image highlights the sRGB gamut. The description of that image follows:
The colors for this diagram were generated using the RGB color space in en:Adobe photoshop. The transformation from xy chromaticity coordinates was done using the en:sRGB color space specification on the [X,Y,Z]=[x,y,1-x-y] tristimulus values, then multiplying by a constant so that one of the R, G, or B values was maximized. Assuming that one's monitor converts Adobe photoshop RGB according to the sRGB color space (probably a good assumption) then, within the sRGB gamut, the chromaticities are correct, but are incorrect outside the gamut. (See the sRGB article for a description of the sRGB gamut). The process of maximizing the value of R, G, or B results in a distinct 3-pointed star in the diagram, centered at the D65 white point. This is because, although the chromaticities are correct, the luminosities (brightness values) are not equal across the diagram. If the luminosities were all made equal, then the entire diagram would be rather dark, since pure blue has a low luminosity. Any attempt to equalize luminosity to remove the star will reduce the overall luminosity of the diagram, and the star will not completely disappear until the diagram is very dark. Alternatively, we could blur the colors to get rid of the star, which would give incorrect chromaticities. I have opted for correct chromaticities at maximum brightness, thus the presence of the star. |
| Dato | 6. mai 2006 (original upload date) |
| Kilde | Transferred from en.wikipedia to Commons by Aboalbiss. |
| Opphavsperson | Hankwang at engelsk Wikipedia |
Lisensiering
Orginal opplastningslogg
The original description page was here. All following user names refer to en.wikipedia.
- 2006-05-06 16:28 Hankwang 542×599× (106794 bytes) Based on [[image:CIExy1931.png|thumb|CIExy1931]]
Lisensiering
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Dette verket har blitt frigitt til allmennheten av opphavspersonen Hankwang at engelsk Wikipedia. Dette gjelder på verdensbasis. I enkelte land kan dette være juridisk umulig. I så fall: Hankwang gir hvem som helst retten til å bruke dette verket for ethvert formål, uten noen vilkår, med mindre slike vilkår kreves ved lov. |
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Dette bildet bør gjenskapes med hjelp av vektorgrafikk som en SVG-fil. Dette har flere fordeler, se Commons:Media for cleanup for mer informasjon. Hvis en SVG-fil med dette bildet er tilgjengelig, vennligst last den opp. Etter opplasting erstatt denne malen med {{vector version available|nytt bilde.svg}}.
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| Dato/klokkeslett | Miniatyrbilde | Dimensjoner | Bruker | Kommentar | |
|---|---|---|---|---|---|
| nåværende | 28. okt. 2009 kl. 11:37 | | 542 × 599 (104 KB) | wikimediacommons>Aboalbiss | {{Information |Description={{en|Based on: thumb|none|CIExy1931 As a replacement for an existing image with an unclear copyright status. The image highlights the sRGB gamut.}} |Source=Transferred from [http://en.wikipedia.org |
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