Tuesday, October 10, 2006

Scanning your Images

It used to be conventional wisdom to scan at twice the target DPI, so 144 DPI given that web display is nominally 72 DPI. Scanner drivers have improved a lot since then, and scanning at 72 DPI is now OK if you are going to shrink the scanned picture. (The basic idea is that you don't want to try to make more pixels in Photoshop than you got from your input source.) Some scanner drivers have built-in sharpening and color correction: again, it used to be best to turn these off and use Photoshop's more sophisticated features, but now drivers have improved and these features may be acceptable.
Experiment if you can; otherwise, scan at higher resolution and you can shrink things later.
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