Sharpen Images and Focus Deblur
Add Clarity to A Slightly Blurry Image
Sharpening Away Focus and Blur Issues with Frequency Separation
A very common problem with photographs which is nearly impossible to correct perfectly is blurriness or lack of acute focus.
This is one of the reasons why it is a good idea to take several images of the same scene as getting perfect focus can be a challenge in all but the most controlled of circumstances.
Major issues with focus and blur are not currently addressed adequately by any major software package, but minor issues can be resolved using a range of methods.
The method used here is not the easiest one to use but it does give easy to adjust results .