Task 7 How to Use Smart Sharpen
New with Photoshop CS2, the
filter offers more control than the
filter. For example,
allows you to sharpen more in the shadows than the highlights, or vice versa. In addition,
includes alternative sharpening
that go beyond anything
could ever do.
the Smart Sharpen Filter
With your image open, select
Filter, Sharpen, Smart Sharpen
dialog box has a much larger preview pane than does
, so you can safely disable the
check box if it slows down the preview refresh time. Set the
to at least
located under the preview pane.
2. Set the Amount Slider
slider determines how much sharpening is applied. As you increase this value, you increase the edge contrast added to the image. This is how the sharpening effect is achieved. However, higher values can also exaggerate noise and image grain.
3. Set the Radius Slider
slider determines the width of what Photoshop considers to be an edge (remember that sharpening works by adding contrast to edges). You should be as conservative as possible with the
slider because higher values add
around image details. Lower is better here.
4. Set the Remove Method
provides three blur-removal methods, available from the
works exactly like
uses a more sophisticated algorithm to provide finer sharpening.
assumes that the blur was caused by camera shake or subject movement and sharpens at an angle you specify. Although the
the accuracy of all sharpening methods, it can be a drain on computer resources.
5. Set the Advanced Controls
When you click the
option, the sharpening controls area displays three tabs. The
tab has the controls used in steps 24. The
tabs provide controls to fade the sharpening effect in their respective tonal ranges. On each tab, you can specify the
from 0% (no fade at all) to 100% (no sharpening at all). The
slider sets how much of the highlight or shadow range to fade.
defines the area used to identify a pixel as a highlight or a shadow.
6. Apply the Effect
uses navigation techniques common to most Photoshop filters, so clicking and holding inside its preview pane shows the unsharpened version. Releasing the mouse button
the sharpened preview. Toggling this before/after view can be helpful. Click and drag inside the preview pane to shift the area displayed, or click in the actual image to center that section in the preview pane. When you've inspected the entire image, click
to apply the effect.
(or any sharpening method) can be constrained by selecting the area to be sharpened first with any standard selection technique. Alternatively, sharpen a duplicate layer and then use the
tool or a layer mask to hide the areas you don't want sharpened.
Sharpen to a New Layer
Sharpening a duplicate image layer offers multiple advantages: It protects the original version so you can return to it later and allows multiple sharpness settings to be saved for different output purposes. And on severely sharpened images, the blending mode of the sharpened layer can be set to
shifts along edges.