One of the more powerful features of Photoshop is the USM (shapen, umask)
feature. GIMP has a similar funnction (Windows version 1.2.4). However,
the paramter settings are not one-to-one. Does anyone have suggestions on
how to convert setting from the PS USM tool into the GIMP tool? The PS
version also has a preview window which helps reduce trial and errors
selections. I cannot find a similar feature under GIMP.
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