Here is another sharpening technique I use following on from the previous technique that I wrote about [http://wp.me/pSSen-kw] – whereas the first one can produce halos, that can be dealt with, this one does not.
Step 1 Open the image you would like to sharpen in Photoshop and apply the unsharp mask sharpening technique I showed you here [link]
Step 2 Go under the Edit menu and choose Fade Unsharp Mask
Step 3 Change the Fade dialogue’s pop up menu from Normal to Luminosity
What this technique will do is apply sharpening just to the Luminosity areas of your photograph and now the coloured areas, which results in no colour halos appearing and anything else that could spoil the image as a result of sharpening.