I deal with a large amount of
CMYK images from my clients. Some with color profiles and some without. So far
Coldfusion hasn’t been much help processing them. Although it gets closer with each new release. Here is my workaround to convert
CMYK images into
RGB until Adobe lets us convert images with the
Above is the starting image of my faithful coding companion Bailey. I converted the image to
CMYK and added the U.S. Web Coated (SWOP) v2 color profile in
When you try and read this image in
It throws the following error:
This is where
Imagemagick comes in. We can convert the image to
RGB and remove the color profiles so we can continue. I chose to use a BASH script that I call with
CFEXECUTE, but it appears to work calling it directly from
CFEXECUTE. I had problems in the past with this so I have always done it this way, in case you were wondering.
I pass this script the file I want to convert and where I want to create the new RGB version. The -strip command removes all the Photoshop meta data and the color profile. The
-colorspace rgb command converts the image from CMYK to RGB. Finally the
-quality 100 sets the JPG quality setting for the new image, I created the original at 100 so I just kept it that way for the new one. (It can be adjusted to your personal preference or requirement from 1 to 100.) The new image will keep the same dimensions and resolution as the original image had to start.
Coldfusion example I created here I first try to read the image information. If this fails I call the script to convert the image to
RGB and remove the profile information. Then I read the file with
CFIMAGE and it works. If that fails then you started out with a bum image to begin with.
If you aren’t on OS X or Linux and want to call ImageMagick directly it would work like this :
RGB File after Conversion
So here is the new image of Bailey converted to
RGB and all the profile information removed. The coloring of the image changes slightly when you convert it to
CMYK, but so far I haven’t found a way to get it any closer. You can also resize and get the image info with
Imagemagick, but I am doing that with
CFIMAGE in hopes that I can one day just comment this out and all the operations will work consistently no matter the color format. Maybe Adobe will fix that in the next release so this can all be done in
Hope this helps out others struggling with the same issue. This works well ( I have converted thousands of images) on
OSX. I haven’t tried it on windows, but I would assume it would work by either calling it directly or wrapping it in a BATCH file. If anyone tries it on Microsft Windows let me know.