Advanced sharpening techniques
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Go to the Channels palette and either Ctrl-click (Windows) or Command-click (Mac OS) the RGB thumbnail or click on the 'Load channel as selection' icon from the base of the channels palette to load the edge detail as a selection. Return to the layers palette and drag the Background layer to the new layer icon to make a background copy layer. Drag this background copy layer to the top of the layers stack.
Drag the Background layer to the New Layer icon to duplicate it.
Drag the background copy layer to the top of the layers stack.
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Switch off the visibility of the High Pass layer. Hold down the Alt or Option key and click on the 'Add layer mask' icon in the layers palette. Make sure the layer mask thumbnail is the active part of the layer and then go to Filter > Blur > Gaussian Blur. Apply a 1.5 pixel radius blue to the mask.
Switch off visibility for the High Pass layer and add a layer mask.
Apply a 1.5 pixel radius blue in the Gaussian Blur dialog box.
Remaining pixels in the skin away from the eyes mouth and nose were painted over using the paintbrush tool with white selected as the foreground color.
