Apple Aperture 3.5 User Manual
Page 312
Chapter 7
Make image adjustments
312
Sharpen an image using the Edge Sharpen controls
1
Select a photo.
2
If the Edge Sharpen controls aren’t shown in the Adjustments inspector or the Adjustments pane
of the Inspector HUD, choose Edge Sharpen from the Add Adjustment pop-up menu (or press
Control-S), and specify the following settings:
•
To adjust the strength of the Edge Sharpen adjustment: Use the Intensity parameter controls.
Use the Intensity slider
and value slider to
adjust the strength of the
sharpening adjustment.
A value of 0.0 applies no sharpening adjustment to the image. A value greater than 0.0
increases the sharpening adjustment.
•
To adjust the threshold for determining which pixels are edges and which ones are not: Use the
Edges parameter controls.
Use the Edges slider
and value slider to adjust
the threshold of the
sharpening adjustment.
A value of 0.0 applies no sharpening adjustment to the image. A value greater than 0.0
increases the number of pixels that qualify as edges.
Note: If you observe digital noise beginning to increase in flat areas of the image (areas with
little or no contrast), decrease the Edges parameter setting.
•
To adjust the amount of sharpening applied in the subsequent sharpening passes: Use the Falloff
parameter controls.
Use the Falloff slider and
value slider to adjust the
strength of the subsequent
sharpening adjustment.
The falloff percentage is applied proportionally to the second and third sharpening passes.
For example, if 0.69 (69 percent) is set as the Falloff parameter value, 69 percent of the
original amount of sharpening is applied during the second sharpening pass, and 69 percent
of the amount of sharpening from the second sharpening pass is applied during the third
sharpening pass. In other words, only 47.6 percent of the amount of the original sharpening is
applied during the third sharpening pass.
You can also brush the Edge Sharpen adjustment on specific areas of an image. For more
information, see
on page 228.
Use the Edge Sharpen workflow
The Edge Sharpen adjustment in Aperture is a professional tool that’s used to sharpen photos.
Using the Edge Sharpen adjustment controls in conjunction with the following workflow makes
it easy to achieve professional results.
1
In the Edge Sharpen area of the Adjustments inspector or the Adjustments pane of the Inspector
HUD, set the Intensity slider to the maximum value to see the effect of the operation.
2
Adjust the Edges slider so that you can see which parts of the image are being sharpened.
Try to adjust the Edges slider so that edges are sharpened, but noise and texture in the image
aren’t affected.
67% resize factor