Photoshop by the Numbers: The Unsharp Mask filter
The Unsharp Mask filter pt.1 - The basics
How can you sharpen an edge that is already sharp? The Unsharp Mask filter does it, and this article explains how.
The Unsharp Mask filter pt.2 - The parameters in practice
Amount, Radius and Threshold - this article makes some suggestions how to set Unsharp Mask's parameters for optimal sharpening results.
The Unsharp Mask filter pt.3 - High radius, low amount sharpening
An interesting effect results from a high Radius and low Amount setting on the USM filter. I compare it, among others, to a global contrast curve.
The Unsharp Mask filter pt.4 - Why "Unsharp Mask"?
Why is Unsharp Mask called Unsharp Mask? There is a reason, and in this article I show in precise detail what it is.
Photoshop by the Numbers
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