The Sharpen Filters
The
Sharpen Filters produce the exact opposite
of the Blur Filters
and some of the Noise filters that I went over earlier. They are useful
for clearing up blurry or out of focus images.
Sharpen, Sharpen More
These filters do essentially the same thing, except
Sharpen More applies the effect at a greater level. They enhance and clarify
the contrasting areas of an image. These are two of the simplest and easiest
to use filters in Photoshop:
they don't even have pop-up dialog boxes to adjust the levels they are applied at!
The Sharpen Edges Filter
This filter is the inverse of the Despeckle Noise Filter.
Instead of softening and making the sharp contrast areas within an image, it
brings them right out into the open.The Unsharp Mask Filter
This filter enhances edges or areas of
contrast in the quietest, most unnoticeable way. The filter creates a dark line on one side of the edge, and
on the other, it creates a light line.
The user is given the option of specifying the radius, how far out from the edge the dark and light lines
should be created.
The Pixelate Filters