File:CIExy1931 srgb gamut.png

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CIExy1931_srgb_gamut.png(542 × 599像素,文件大小:104 KB,MIME类型:image/png


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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.
日期 2006年5月6日 (原始上传日期)
来源 本檔案是由Aboalbissen.wikipedia轉移到維基共享資源。
作者 英语维基百科Hankwang

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原始描述頁面位於這裡。下列使用者名稱均來自en.wikipedia。
  • 2006-05-06 16:28 Hankwang 542×599× (106794 bytes) Based on [[image:CIExy1931.png|thumb|CIExy1931]]

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Public domain 本作品已被作者英语维基百科Hankwang释出到公有领域。这适用于全世界。
在一些国家这可能不合法;如果是这样的话,那么:
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此diagram图片可使用矢量图形重新创建为SVG文件。这具有很多好处;更多信息请参见共享资源:待清理媒体。如果存在此图片的SVG格式,请将其上传,然后将此模板替换为{{vector version available|新图片名称}}


建议您将SVG命名为“CIExy1931 srgb gamut.svg”,这样在使用Vector version available(或Vva)模板时就不需要填写新图片名称参数。

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