Quoting "Tiesters, Timothy [PRDBE Extern]" <[EMAIL PROTECTED]>:

> Hi
>
> Is there any possibility to attach an image to a pdf, and show this   
> image in a pdf, without the image being stored a second time in the   
> pdf?

Oops, I didn't read your question well enough.
You want the Image to be added as a file attachment
as AND as an Image XObject and have it refer to the
same PDF stream object? Then you'd have to refer to
the same stream from both the File Specification
Dictionary and the Image XObject dictionary.

However: most of the streams for images in PDF are
transformed into an Image format that is suited for
viewing in PDF. Whereas you probably want an attachment
to keep its initial format (for instance PNG).

That makes your requirement impossible (and it explains
why you didn't find anything about it in any book); except
if you understand the PDF Reference chapter about images.
--
This answer is provided by 1T3XT BVBA.

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