3.3

Chapter 17 Making Image Adjustments 384
•
Double-click the number in the Intensity value slider, then enter a value from 0.0 to 1.0 and
press Return.
Use the Intensity slider and
value slider to adjust the strength
of the sharpening adjustment.
Use the Radius slider and
value slider to adjust the area
over which the sharpening
adjustment is applied.
A value of 0.0 applies no sharpening adjustment to the image. A value greater than 0.0 increases
the sharpening adjustment to the image.
4 Adjust the area over which the sharpening adjustment is applied (the distance, in pixels, that
Aperture goes from each pixel to evaluate sharpness) by doing one of the following:
•
By default, the Radius slider is set to 1.0 pixels. Drag the Radius slider to the right to increase
the area over which the sharpening eect is applied, and drag the Radius slider back to the left
to reduce it.
•
Click the left or right arrow in the Radius value slider to adjust the Radius pixel distance by 5
percent increments, or drag in the value eld.
•
Double-click the number in the Radius value slider, then enter a value from 0.0 to 20.0 and
press Return.
A value of 0.0 applies no sharpening adjustment to the image. A value greater than 0.0 increases
the area over which the sharpening adjustment is applied.
As you change the parameter values, the image is updated to display the sharpening eect.
You can also brush the Sharpen adjustment on selected parts of an image. For more information,
see An Overview of Brushed Adjustments on page 388.
Working with the Vignette Controls
You use the Vignette adjustment controls to apply a vignette to an image. The term vignette
describes an image whose brightness fades to its periphery from its center. Vignettes are usually
applied to an image after it is shot, for artistic eect. Aperture provides two types of vignettes:
Exposure and Gamma.