Comments on: Using PHP’s Imagick class to convert a CMYK jpeg to RGB http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/ We Get Stuff Done. :) Mon, 30 Apr 2012 06:15:03 +0000 hourly 1 http://wordpress.org/?v=3.1.3 By: PrashantP http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1758 PrashantP Mon, 23 Jan 2012 12:23:21 +0000 http://www.offshootinc.com/blog/?p=173#comment-1758 Thanks Woodford, I also done tons of research on this issue and then came to know from your provided code. It worked superb as Imagick and other related packages was already installed on my server. Thanks a lot once again! Thanks Woodford, I also done tons of research on this issue and then came to know from your provided code. It worked superb as Imagick and other related packages was already installed on my server.

Thanks a lot once again!

]]> By: Michael http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1475 Michael Thu, 03 Mar 2011 20:10:36 +0000 http://www.offshootinc.com/blog/?p=173#comment-1475 Great Info. Saved me some development time :) Great Info. Saved me some development time :)

]]> By: KrisBerg http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1449 KrisBerg Thu, 13 Jan 2011 01:23:21 +0000 http://www.offshootinc.com/blog/?p=173#comment-1449 I just figured out that the image i tried to convert had some sort of a color profile, and since I don't know much about that subject I can only give you guys the solution that seems to work for me. I downloaded the profiles here: http://www.color.org/srgbprofiles.xalter and read the last post here: http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=13578 and tried this in my terminal for a test conversion: "convert CMYK.jpg -profile sRGB_v4_ICC_preference.icc -colorspace RGB test.jpg" It seems to be quite similar to the RGB test file I download in color comparison. Hope it helps for those who experienced the same challenge I stumbled upon :) I just figured out that the image i tried to convert had some sort of a color profile, and since I don’t know much about that subject I can only give you guys the solution that seems to work for me. I downloaded the profiles here:
http://www.color.org/srgbprofiles.xalter

and read the last post here:
http://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=13578

and tried this in my terminal for a test conversion:
“convert CMYK.jpg -profile sRGB_v4_ICC_preference.icc -colorspace RGB test.jpg”

It seems to be quite similar to the RGB test file I download in color comparison. Hope it helps for those who experienced the same challenge I stumbled upon :)

]]> By: KrisBerg http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1448 KrisBerg Thu, 13 Jan 2011 01:03:25 +0000 http://www.offshootinc.com/blog/?p=173#comment-1448 Hey Chris, Thanks for trying to figure this out mate. I tried it out, but it seems that it just "invert" the CMYK-image. I checked to see if that was actually happend visually, and it seems like it did by invert it again in GIMP. It also seems like it adjusted the levels/brightness of it... This is a sample CMYK image I used: http://www.manheimcanadalogos.com/images/jpeg/Manheim_Canada_logo_clr-4c.jpg You can find the correct RGB image here as well: http://www.manheimcanadalogos.com/images/jpeg/Manheim_Canada_logo_clr.jpg So as you said, I'm back to Google :/ PS: This failure of correct converting it MIGHT be something to do with my versions of come lib or installation of whatever component. Not making the version list too long, all I did was a clean install of Ubuntu 10.10 + lamp + php5 and GD libs etc. Cheers, Kris Hey Chris,

Thanks for trying to figure this out mate. I tried it out, but it seems that it just “invert” the CMYK-image. I checked to see if that was actually happend visually, and it seems like it did by invert it again in GIMP. It also seems like it adjusted the levels/brightness of it…

This is a sample CMYK image I used:
http://www.manheimcanadalogos.com/images/jpeg/Manheim_Canada_logo_clr-4c.jpg

You can find the correct RGB image here as well:
http://www.manheimcanadalogos.com/images/jpeg/Manheim_Canada_logo_clr.jpg

So as you said, I’m back to Google :/

PS: This failure of correct converting it MIGHT be something to do with my versions of come lib or installation of whatever component. Not making the version list too long, all I did was a clean install of Ubuntu 10.10 + lamp + php5 and GD libs etc.

Cheers,
Kris

]]> By: Tom http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1420 Tom Tue, 05 Oct 2010 02:54:15 +0000 http://www.offshootinc.com/blog/?p=173#comment-1420 Awesome snippet. Cheers! Awesome snippet. Cheers!

]]> By: Elnur Abdurrakhimov http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1323 Elnur Abdurrakhimov Mon, 21 Sep 2009 07:18:39 +0000 http://www.offshootinc.com/blog/?p=173#comment-1323 Chris Woodford, thank you very much for the information. It helped me to solve the problem of CMYK not showing in IE. Chris Woodford, thank you very much for the information. It helped me to solve the problem of CMYK not showing in IE.

]]> By: Elnur Abdurrakhimov http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1322 Elnur Abdurrakhimov Mon, 21 Sep 2009 06:44:53 +0000 http://www.offshootinc.com/blog/?p=173#comment-1322 batfastad, I should correct you: you also need Imagemagick installed on the server. batfastad, I should correct you: you also need Imagemagick installed on the server.

]]> By: batfastad http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1317 batfastad Wed, 26 Aug 2009 16:47:25 +0000 http://www.offshootinc.com/blog/?p=173#comment-1317 It's actually a PECL module available from http://pecl.php.net/package/imagick You get access to the class and its functions when you install that module. You also need Imagick installed on the server as well... otherwise the imagick module won't do anything It’s actually a PECL module available from http://pecl.php.net/package/imagick
You get access to the class and its functions when you install that module.
You also need Imagick installed on the server as well… otherwise the imagick module won’t do anything

]]> By: Neela http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1298 Neela Mon, 15 Jun 2009 05:48:55 +0000 http://www.offshootinc.com/blog/?p=173#comment-1298 Could u please tell where to get the 'Imagick' class from ? Could u please tell where to get the ‘Imagick’ class from ?

]]> By: Shaun http://offshootinc.com/blog/2008/10/24/using-the-imagick-class-to-convert-a-cmyk-jpeg-to-rgb/comment-page-1/#comment-1269 Shaun Wed, 11 Feb 2009 08:51:39 +0000 http://www.offshootinc.com/blog/?p=173#comment-1269 Thanks, I've been looking for this solution for months. Great stuff Thanks,

I’ve been looking for this solution for months.

Great stuff

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