Hey Nikon friends,
I could use some Photoshop advice (and it does need to be Photoshop because that's what I have at work).
I'm working on images of a document that is 176 years old. I have seven different multispectral images with different filters applied. The document is chiefly written in ink, but it has some very faint graphite that I'd like to enhance. I've chosen the filtered image that seemed to show the graphite best, and now I'm working in Photoshop to enhance it even further.
No one cares what the ink looks like in the image--all eyes are on the graphite--so it's ok to get a bit extreme. I've been messing with levels and curves and have achieved some decent results.
The image is already filtered by color wavelengths, and it's grayscale to boot, so there can be no messing with color channels.
Is there anything else you'd recommend to bring out some faint graphite? (Sorry--I can't share the image here.)