Converting RGB values to CMYK

Posted by llk on Stack Overflow See other posts from Stack Overflow or by llk
Published on 2010-06-11T22:27:28Z Indexed on 2010/06/11 22:33 UTC
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iphone

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objective-c

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cocoa-touch

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color

Hi all,

I have RGB values that I need to convert into CMYK values. I'm using the iPhone SDK to try and do this.

I have tried a couple of things, but cannot either get the values to be anything other than 0 or 1, or the K element is completely wrong (showing up as a negative number).

Any help would be a life saver!

Thanks in advance!

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