File:CIExy1931 srgb gamut.png

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


摘要

描述
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 Transferred from en.wikipedia to Commons by Aboalbiss.
作者 英语维基百科Hankwang

许可协议

原始上传日志

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]]

许可协议

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:
Hankwang无条件地授予任何人以任何目的使用本作品的权利,除非这些条件是法律规定所必需的。


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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image/png

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2d52889fb36283f9f1c86b8fc31cac5c8ccbf024

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当前2009年10月28日 (三) 09:372009年10月28日 (三) 09:37版本的缩略图542 × 599(104 KB)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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