Maybe I'm thick.. but what do you mean exactly? What are you trying to do? Take pictures of documents and import them from the camera onto the Mac? iPhoto will do that, as will ImageCapture - both of which come with the Mac.
ah.. ok.
I think most OCR software will do that - eg: OmniPage: http://scanned-documents.blogspot.com/
which has the added benefit of not just cleaning up the image, but also coverting text into text. Acrobat Pro does it too I believe.