RAW Bildbearbeitungsprogramm AfterShot Pro
 

USM - Standard Unsharp Mask

by roland65

Here is the standard Unsharp Mask plugin for picture sharpening and local contrast enhancement.

The unsharp mask works by creating a slightly blurred version of the original image, which is then subtracted away from the original to detect the presence of edges.

It can also be used (with large radius and small amount) for local constrast enhancement.

Note the filtering is done on the Lab L channel.

Typical parameter values:

  • Sharpening: radius = 1, amount = 100, threshold = 0
  • Local contrast enhancement: radius = 60, amount = 20, threshold = 0 >

Tip: both effects can be combined by using two separate layers.

Caution: very large radius values (>100) can sometimes cause tiling image artefacts.

Learn more about USM

USM - Standard Unsharp Mask

Download this plugin now:

USM-0.6.afzplug (32-bit)

64-bit version not yet available

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