Load your picture up into Photoshop. The create a duplicate of the image by selecting the background layer and dragging it to the duplicate layer button.
You should now have 2 identical layers.
Sharpening an Image
Sharpening an image will not fix a badly out of focus or blurred picture. However some cameras do produce "softer" images than others, for example the Canon EOS 10D. Whilst this can be flattering on portraits there are times when people may want a bit more "bite" to their images.
Many people using software packages such as Photoshop simply rely on the unsharp mask option. But this has the effect of adding unwanted artefacts or noise to the image. A better option you may want to try is shown below.
|
Load your picture up into Photoshop. The create a duplicate of the image by selecting the background layer and dragging it to the duplicate layer button. |
You should now have 2 identical layers. |
 Next, go to the drop down menus and select FILTER then OTHER then HIGH PASS. Change the radius (a figure between 2 and 3 usually works well.). The higher the number the "coarser" the effect. Click OK |
 On the layers window click on the arrow next to NORMAL. |
 On the menu that appears select OVERLAY. |
 The effects of the sharpening can be seen by turning the layer on and off by clicking on the eye to the left of the layer. |
 |
|
Without sharpening |
 |
|
With sharpening - High pass filter set to 3 |