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Before moving to 64 bit cold fusion two years ago we used Efflare's CFX_ImageCR3 to great success. CFImage appeared to work pretty well, although their thumbs never looked as crisp as Efflare's despite max cfimage settings. Recently, we are working on setting up large ecommerce sites with thousands of images each and are hitting all kinds of problems with CFImage and CMYK JPGs. Before it was not that big of a deal -- if the customer uploaded a CMYK image we would tell him that it needed to be RGB. That's not possible with some of our newer clients however.
CFX_ImageCR3, which supports CMYK JPGs, has a 64 bit app in beta and doesn't appear to be worked on or supported. Can anyone recommend another image manipulation app? Has anyone tried offloading image manipulation to another server?
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A couple of years ago we used JMagick (the open source Java interface of ImageMagick) to convert CMYK image files to RGB image files.We used it in a tomcat environment, but it should be very easy to integrate the JARs to coldfusion and wrap them with cf functinality.
Probably there is a 64-bit version, but I don't know.
Take a lok at http://sourceforge.net/projects/jmagick/
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It's funny you bring this up as we have been looking at Graphics Magick (an Image Magick fork). Graphics Magick is also used by Flickr. It turns out Jukka Manner has been working on a new cfx_openimage tag that makes use of it, which can be found here : http://www.kolumbus.fi/jukka.manner/cfx_openimage/
Alas, no 64 bit support although he says he's working on it.