Is sharpen = USM or something else.
Is sharpen functionally equivalent to Photoshop's USM: where sharpened = original + (original − blurred) × amount?
If not would it be possible to get an implementation of Unsharp-masking.
Comments
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Hi @jstuartj, I'm not sure if it's identical, but the "Sharpen" plugin does work on a similar idea at least.
