Art SOS! How to rescue an old print in Photoshop
Wednesday, September 24th, 2008 11:21am
A very long time ago, Olga’s very fancy and not-even-that-old computer went to a better place. (The motherboard died, there’s no bringing that sucker back.) And sadly, a few pieces of artwork that she didn’t back up went with it. (I can’t say it enough, back up your stuff, cousins!)
One of the lost pieces was Undomiel Rising. I haven’t been able to do anything with this image because as we all know, web-sized graphics just don’t print well. I considered the piece long gone and buried… Until last week, when I found a lone printout among old papers.
Lo and behold! “I could do something with this!” I thought. I could make some postcards. The printout is big enough that I could scale it down and still get a print-quality file. So I set out to rescue the image.
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First order of business is to get a high-resolution version of the image back on the computer. (Normally I wouldn’t recommend re-scanning artwork, but in this case it’ll be used at half the print size, so we can get away with some line quality loss.)
Minimum print resolution is 300dpi, and to capture as much detail as possible I scanned the print at twice the size - 600dpi.

Here is the scanned file. Egads! It looks just dreadful enough to warrant the use of “egads.” Time for some Photoshop magic.
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Cleanup the scan, removing any dust, lint or weird scratches. The Clone Stamp tool can take care of these.

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Sharpen the scan by using the Unsharp Mask filter. It gives you best control of the filter, while allowing to see the results in a preview window.

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Tip » use an adjustment layer to preserve the scan and editability in Levels and other effects.
Is “editability” even a proper word? |
Now let’s fix the colors. At this stage I convert the file to CMYK mode. This is the mode used for printing - because it correlates to the Cyan, Magenta, Yellow and blacK inks used in the 4-color printing process. When correcting color, this is the mode that makes the most sense to me. (If you’re editing an image for the web, RBG mode will be fine.)
My image scanned with a very heavy yellow overtone, so I use Levels to balance out the colors.
In Yellow channel move the right slider to lighten up the amount of yellow in the image. Cyan channel: move left slider to add intensity.

Likewise, I added some intensity in the Magenta and the overall CMYK channels.


And here is my final image.

That’s what I’m talking about!
Reduced to a smaller size the difference in quality between this one and the original becomes truly negligible. Young Arwen Undomiel is now ready to be shared with the world on some lovely postcards. ^_^


