To Sharpen an image on photoshop you need to duplicate your image. Once you have duplicated your picture on photoshop you need to double click on the second layer (the layer you're going to sharpen) and it will pull up the Layer Style window. Make sure the opacity is at 66% and that and that on the 'This Layer' is at 235 and 255 , to split the slider you need to press alt and click on it. After this Press OK.
Then click on filter at the top of your screen and go down to 'Sharpen' and the 'Unsharp Mask'.
This window will pop up and you need the exact settings showing , 320% , 0.6 Pixels and 4 Levels.
Clicking on 'Edit' and then 'Fade Unsharpen Mask' it will pull this next window.
