The
next thing I do is to sharpen my image somewhat. I do this with Sharpen,
Unsharp Mask under the Filter menu. Again, do this step only once because
it can drastically change your image. What you want to do is only sharpen
the edges within your image. Don't use the Sharpen Edges tool because it
gives you no control over how much sharpening you can do. Set radius to
1.5 [A] and threshold to 10 [B]. This controls the width of the pixels that
are modified at an edge and the difference in pixel values that must be
present to constitute an edge. If the threshold is set to zero, everything
in the image is a candidate for being an edge and getting sharpened. This
can distort the picture tremendously (so set to 10 or above, experiment).
Amount of sharpening can vary between 1 and 100% [C]; much over that and
the image gets very distorted (Try it, and see what you get; it goes up
to 500%). Keep preview selected [D] and click on the small image box [E]
inside the tool to undo the sharpening inside the box and see how the original
contrasts with the sharpened image. OK to save results.