dymon Posted April 13, 2010 Share Posted April 13, 2010 Hi all, I need to convert an image or pdf from RGB to CMYK in PHP, it's important for print. Thanks in advance. Best regards, Dymon Quote Link to comment https://forums.phpfreaks.com/topic/198379-convert-rgb-image-to-cmyk-or-pdf/ Share on other sites More sharing options...
Mchl Posted April 13, 2010 Share Posted April 13, 2010 What do you mean by that? RGB and CMYK are two systems of color representation. Here you will find appropriate formulas: http://www.easyrgb.com/index.php?X=MATH&H=11#text11 Quote Link to comment https://forums.phpfreaks.com/topic/198379-convert-rgb-image-to-cmyk-or-pdf/#findComment-1040945 Share on other sites More sharing options...
ignace Posted April 13, 2010 Share Posted April 13, 2010 You can't convert RGB to CMYK as your RGB values will be an approximation. This article discusses the subject and also gives you a solution that comes close to the actual CMYK values. http://developer.loftdigital.com/blog/cmyk-rgb-and-php Quote Link to comment https://forums.phpfreaks.com/topic/198379-convert-rgb-image-to-cmyk-or-pdf/#findComment-1040946 Share on other sites More sharing options...
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