Re: Embedded profiles in PDF
Re: Embedded profiles in PDF
- Subject: Re: Embedded profiles in PDF
- From: Chris Murphy <email@hidden>
- Date: Fri, 22 Apr 2005 01:44:02 -0600
On Apr 18, 2005, at 3:02 PM, Roger Breton wrote:
I was wondering how could that be? So I called the friendly folks at
Adobe
InDesign tech support and they told me that, when exporting to PDF from
InDesign CS, every instance of the image profile gets included in the
PDF.
Totally contradicting the discussion presented by the authors?
Whoever you talked to is wrong. It's easy to demonstrate this:
1. Create an InDesign document with 10 CMYK images
2. Export a PDF using the Press Quality preset (this does not embed
profiles).
3. Export a PDF, but this time check the Include ICC Profiles checkbox
in PDF Export
Compare the file size of the two files. The difference in file size is
not 10x the size of whatever profile you have set as your CMYK Working
Space. It's actually less than 1x the size of whatever profile you've
set as your CMYK Working Space because only one copy of that profile
has been embedded, and is also compressed. If you use Pitstop Pro to
check each of the 10 CMYK images, each one is ICCBased and is tagged
with that profile.
I have not had a chance to extensively study the latest PDF standard
but I
know it's possible to peek inside a PDF with a text editor and fish
for all
kinds of information, provided one knows how to decode the data.
If you find a scenario that causes the same profile data to occur more
than once in the PDF, let me know how you did it!
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
-------------------------------------------------------------
Co-author "Real World Color Management, 2nd Edition"
Published by PeachPit Press (ISBN 0-321-26722-2)
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