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JPG Color Profiles in Ubuntu


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#1 whoabuddy

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Posted 22 August 2011 - 04:15 PM

Hi All,

I occasionally have to convert a PDF to a JPG (or other image format) before submitting it to an on-line printing site, however they request that the file is in CMYK format to ensure the colors print correctly. I am able to open the PDF in Gimp and save it as a JPG with 300dpi resolution, but there is no option for CMYK.

After some research I found ImageMagick's convert command which looked promising, but no matter what settings I've used so far the output image is blurry. Here's the command I'm using:

convert businesscard-rgb.jpg -colorspace cmyk -quality 100 businesscard-cmyk.jpg

Am I missing something? Or is there an easier tool to use for this purpose?

Thanks in advance!
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#2 pane-free

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Posted 22 August 2011 - 10:35 PM

See this link -- hope it helps, but then again . . .

Posted Image

Edited by pane-free, 22 August 2011 - 10:38 PM.

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#3 whoabuddy

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Posted 23 August 2011 - 09:34 AM

This looks like it will work great, I will give it a try later today, thanks for the info!!
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#4 whoabuddy

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Posted 08 September 2011 - 10:43 PM

I tried to get the Separate+ plug-in working with Gimp, but after a few unsuccessful bouts with the command prompt I was at a bit of a loss. I downloaded lcsm2.2.2, separate+0.5.8, and the Adobe ICC profiles, but I got a little lost when it came to trying to edit the make files and get the three working together.

I took a step back and did another search, and I came up with this tool, a free AND on-line converter that I wanted to share. The JPG files seem to lose quality however the TIF option worked for what I needed, hopefully this tool will be useful for others trying to convert RGB files to CMYK.

Thanks again for all the help, I am sure I will try the plug-in setup again when I'm not as frustrated with it!
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