Sharpen
The Sharpen effect allows you to make your images better focused (although it cannot substitute for an image that's properly focused in the first place). It focuses blurry images by increasing the contrast of adjacent pixels.
In the Properties Area of the Video Effect window you can change the effect propertieschange the effect properties.
The only property of the Sharpen effect available for setting is its level (the magnitude of displacement).
In the figures below you can see the video picture before and after applying the Sharpen effect:
Before applying the Sharpen effect
After applying the Sharpen effect