: Filtering out color I have a WWII letter my father wrote that was censured with what looks like a green pen making circular squiggles. Will Photoshop be able to filter out the green and leave

@Candy945

Photoshop can do a lot, if there is a tiny difference of colour, then yes, it can be filtered out (even if not possible to see with the eyes). So give it a shot, make a good picture of it and play around with the curves and similar stuff (Image -> Adjustments -> Curves)

If you want I can do it for you, because Photoshop is indeed expensive. If you'd rather keep the information to yourself I suggest using Gimp, one of the best free photoediting softwares out there. Gimp has enough tools to do the job!

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@Alves566

Photoshop can filter out the green. But that won't bring the Blue back. If the Blue is completely covered by Green you will basically be left with whatever Green you are already able to see. Maybe by zooming in and really studying minor differences you can get a little bit more out of by scanning but not much. This is also not something a beginner will probably be able to do.

You might be better off bringing it to some sort of historian expert that could look under a microscope to try and find minor differences in the color, but even that will be exceptionally hard.


So can Photoshop filter out the green? Yes! I still stand by that
Will it make something directly under the green visible again? Doubtful

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