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Lehiboy
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PDF Layering in Illustrator

May 1, 2011 8:53 AM

I would like to ask a simple quesiton in light of the controversy surrounding President Obama's birth certificate.  The quesiton is this:

 

If I take a document (say a birth cetificate, or a newspaper, etc.) and scan it using Illustrator, will the software automatically isolate certain elements in the document as a layer?  Will it isolate the text, for example, the seal, etc.?

 

Many thanks!

 

Brian

1198 Views   1 Reply   Latest reply: Marian Driscoll, May 27, 2011 8:41 AM
 
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    1. Marian Driscoll,
    May 27, 2011 8:41 AM   in reply to Lehiboy
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    Illustrator is a vector program that would not likely be used for scanning.

     

    You might have seen a blog or article using Illustrator to view Obama's certificate. Viewing and analyzing is different than creating.

     

    See my post in this discussion for how one can replicate the scan to separate elements. The separate elements are created during PDF optimization.

    http://forums.adobe.com/message/3704798#3704798

     

    PDF optimization automatically isolates elements of a page and applies different types of compression to obtain the smallest file size. In the PDF posted on whitehouse.gov, the green background layer was optimized as 8- or 24-bit color. The black text that appears above it has been optimized as just 1-bit. You can confirm this by extreme zooming on the document. The green area has a dithered pattern of various shades of green while the text appears blocky (no antialiasing) with a single shade of black (or gray, depending on color management).

     
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