Modify background colors of a PDF

Question

I have a PDF that was created by a scanner for which the colors were not configured properly so all of the pages have a green tint to them. The scans were actually of old pieces of paper which had a sort of brown patina but, again, the background is more green than it should be. Can I adjust the overall hue (?) of the pages to reduce the green or shade it more toward brown? I need to be able to do this for all pages at once, not just a page at a time (some of my PDFs are hundreds of pages long). If the solution is to use external software - like PhotoShop - in conjunction with my Acrobat PRO DC, then that's ok

To be clear, I want to permanently edit the PDF, not just adjust the viewing (e.g., through accessibility features). And I want to retain but adjust the colors, not convert the document to black/white. (Notice that some of the pages in the attached sample document have some red text which I need to preserve).

Thanks for any help.

try67 · Accepted Answer

You should use an image editor for this task, like Photoshop. Then create a new PDF from the adjusted images.

Abambo · Answer

There is no method I'm aware of, except for opening each document and editing each page of the document in Photoshop. So, document by document and page by page! Sorry about that. Acrobat was not intended to modify the colours of embedded images.

There may be 3rd party software around for fixing that, but I'm not aware of those.

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