Five Ways to Adjust Clarity in Photoshop Elements 11
Sharpen for better focus.
Sometimes, images captured by a scanner or a digital camera are a little soft, and it’s not due to any tonal adjustments. Occasionally, you may even want to sharpen a selected area in your image just so that it becomes a better focal point.
Keep in mind that you can’t really improve the focus of an image after capturing it. But you can do a decent job of faking it. All sharpening tools work by increasing the contrast between adjacent pixels. This increased contrast causes the edges to appear more distinct, thereby giving the illusion that the focus is improved.