After reading these tips, you’ll learn how to do this with your photo scans:
Sometimes your photos will look OK. But when you scan them and have a closer look, they look a bit blurry. Or maybe your dad just took a blurry photo!
In any case, this is pretty easy to fix. Here’s how…
1. What Tool To Use To Sharpen Photo Scans
Open your photo scan, and find the Unsharp Mask tool. Here’s where to find it…
The command is: Filter -> Sharpen -> Unsharp Mask
2. How To Use Unsharp Mask To Sharpen Photos
When you open the Unsharp Make, you’ll see something like this…
Now, see Amount, Radius, Threshold? After playing around with these setting many time, here’s the best setup:
A. Amount: This is the one I use the most. It can range from 5% to 80%, depending how blurry your photo scan is.
B. Radius: I usually keep this around 2 – 6 pixels. You don’t have to move it too much.
C. Threshold: I usually never touch this, and keep it at 0.
3 Action Step To Do RIGHT NOW…
Step 1. Open a blurry photo scan in Photoshop.
Step 2. Open the Unsharp Mask tool (Filter -> Sharpen -> Unsharp Mask)
Step 3. Keep Threshold at 0; Radius 2 – 3; and only move Amount until your image looks sharp enough.
Taken from http://howtoscan.ca