Re: Converting using Device Links
Re: Converting using Device Links
- Subject: Re: Converting using Device Links
- From: Marco Ugolini <email@hidden>
- Date: Tue, 22 Aug 2006 23:19:42 -0700
In a message dated 8/22/06 2:04 AM, Joseph Yates wrote:
> Need to use just that AppleScript right now to convert a whole lot of images
> using a DeviceLink profile I created in PMP 5 (CMYK->CMYK).
>
> Questions:
>
> Can you set up this script to batch convert a whole folder of images?
> (Source profiles in all images are the same)
>
> How does one know that the conversion worked?
Hi Joseph.
Open one of the converted images, assign the same profile that you
designated as the target in the device link, and if the image looks right on
your profiled monitor (the same appearance as that of the image before the
conversion), then it's quite likely that it worked.
Yes, it is a pain that the "Convert File Using Device Link" script does not
embed the correct profile, but, come to think of it, how would it know what
the right profile is for that particular device link conversion?
There may be ways to "enhance" the script so that it has a step in which you
can designate the profile to be assigned to the converted file, but I am
afraid I cannot advise you on how to do that, since my AppleScript skills
are not exactly stellar.
> I just tried to convert 1 image and when I go to open in Photoshop I get the
> window that indicates the image has no embedded profile. Do I also have to
> do a script to embed (destination of device link) device profile?
> Again a way to batch embed a whole folder of images?
>
> Should the Black channel in a Device Link CMYK to CMYK conversion maintain
> the same percentage from source to destination?
I doubt that that would be the case, since different profiles define
different behaviors (including inks and dot gain, er..., TVI, as they call
it these days). The trick would be to make the conversion (which possibly
changes the values in the black channel), but still keep pure the blacks
that were pure in the source file, even though their numerical values may
change slightly.
> I test converted a Kodak Grayscale Q13 using the Device Link profile and the
> darkest patch shows a drop from 83% black (source) to 79% (destination).
Yes, but that might be wholly appropriate for the printing environment
described in the destination profile, due to any of a number of reasons (ink
composition, densities, TVI, etc.).
Regards.
--------------
Marco Ugolini
Mill Valley, CA
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