If you are ONLY replacing the Image XObjects with ones that are the  
same dimensions - then you don't need to worry about coordinates.

If you are trying to replace them with variant sizes, then you will  
need to parse the content stream, track state, replace any/all  
relevant 'cm' operators that are responsible for assigning the final  
transform.

Leonard


On Sep 4, 2008, at 6:06 AM, Nathaniel Trevivian wrote:

> Hi,
>
> I'm trying to replace images in a PDF with text or another image. In
> order to correctly replace the image, I need to know the image X and Y
> position on the page.
> Obviously I can get the XObject details, and from that get the image
> height and width, but no page location  co-ordinates.
>
> How do I get those co-ordinates?
>
> Thanks for any help anyone can provide.
> Nathan
>
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