The High Pass technique
In Photoshop, hit Cmd/Ctrl+J to duplicate the layer. In the Layers Panel, right-click the layer, ‘Convert to Smart Object’, then go to Filter> Other>High Pass. Set to three pixels, hit OK, then change the layer Blend Mode to Overlay for a lovely sharpening effect. To tweak the strength, double-click the layer’s smart filter.
Sharpening for print
Always sharpen for print after resizing. The correct resolution for prints is 300 pixels per inch. So a 10in print should be 3,000 pixels wide. Prints have a higher crispness threshold than on-screen, so in general, push the sharpening effect slightly further than you would with an on-screen image.
Settings for landscapes and portraits
Several sharpening tools offer a Radius slider, which controls the distance from an edge in which…
