RGB CMYK转换

[loop_k]

在网上找了一些发现不是太对啊。有没有固定的转换公式呢

在百度百科里面看到的：
CMYK:C0 M100 Y100 K0
RGB：R230 G0 B18

一个CMYK配色表上面的:
CMYK:C0 M100 Y100 K0
RGB：R223 G0 B41

急用啊。知道的帮帮忙。

[fandh]

没有搞过，帮楼主顶！

[an_bachelor]

http://www.codeproject.com/KB/applications/xcmyk.aspx

[loop_k]

[Quote=引用 2 楼 an_bachelor 的回复:]
http://www.codeproject.com/KB/applications/xcmyk.aspx
[/Quote]
多谢犀利哥啊 可是算出来的还是差的太多啊 不知道上面列出来的 用的是啥公式算的。

CMYK:C0 M100 Y100 K0
RGB：R255 G155 B155

[linglongyouzhi]

from wikipedia

Conversion

Since RGB and CMYK spaces are both device-dependent spaces, there is no simple or general conversion formula that converts between them. Conversions are generally done through color management systems, using color profiles that describe the spaces being converted. Nevertheless, the conversions cannot be exact, particularly where these spaces have different gamuts.

The problem of computing a colorimetric estimate of the color that results from printing various combinations of ink has been addressed by many scientists.[9] A general method that has emerged for the case of halftone printing is to treat each tiny overlap of color dots as one of 8 (combinations of CMY) or of 16 (combinations of CMYK) colors, which in this context are known as Neugebauer primaries. The resultant color would be an area-weighted colorimetric combination of these primary colors, except that the Yule–Nielsen effect ("dot gain") of scattered light between and within the areas complicates the physics and the analysis; empirical formulas for such analysis have been developed, in terms of detailed dye combination absorption spectra and empirical parameters.[9]

[qiaochuanbiao]

关于CMYK和RGB之间的转换，楼主就不要去找公式了。没有一个固定的公式能够实现PhotoShop转换的效果。PS是采用一个表（ICC文件），进行颜色换算的。

[laviewpbt]

CMYK和RGB之间没有严格的转换公式的，这个于色彩配置有关。