Remove watermark/image from existing PDF?

I need to be able to remove a watermark from existing PDFs we have stored in a database. This is a legitimate requirement (rather than trying to remove trial software watermarks) as we have > 10 million PDFs stored with a "copy" watermark that we now want to store without the watermark.
I want to write a service in .NET which can do this programmatically.
Is there any Adobe SDK to support this.? if YES..please help.!
Any samples appriciated..
satish

The first issue you will face is trying to determine HOW the watermark was
added. If it was done in a standard way by a well written tool, then it
will be easily to locate and remove. However, if not, you will have your
work cut out for you.
Either way, you will not be able to use .NET with the Acrobat SDK for this
type of low-level operation.

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You might want to see if you can select the background with the object touchup tool. If so, can you then just delete the selected object. May take a while to go through the document, but if it solves the problem you are ahead. You may be able to select it with JavaScript and repeat the process. My point of using the object touchup tool is that it may not be a background set by Acrobat, but something that is simply labeled as an image from the Acrobat viewpoint.

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Remove watermark/image from existing PDF?

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