Apple Aperture 3.5 - Manual (Page 318)

Chapter 7 Make image adjustments 318
Brush the Polarize adjustment on an image
You use the Polarize Quick Brush adjustment to deepen colors in a specific area of an image
by darkening the shadows and midtones without affecting the black and white points. The
Polarize Quick Brush adjustment uses a Multiply blend to create an effect similar to that of a
polarizing filter.
Before Polarize adjustment After Polarize adjustment
(added contrast to the shadows and midtones
of the granite rocks in the foreground)
Selectively polarize an image
1 Select a photo.
2 Do one of the following:
•
In the Adjustments inspector or the Adjustments pane of the Inspector HUD, choose Quick
Brushes > Polarize (Multiply) from the Add Adjustment pop-up menu.
•
In the tool strip, choose Polarize (Multiply) from the Quick Brush pop-up menu .
The Polarize Brush HUD appears, and the Polarize adjustment controls appear in the Adjustments
inspector and the Adjustments pane of the Inspector HUD, if both are shown.
3 Specify the brush stroke settings using the controls in the Polarize Brush HUD.
For more information, see Apply Quick Brush adjustments on page 231 and Work with brush
strokes on page 232.
4 Brush the adjustment on the area of the image that contains shadows and midtones you want to
add contrast to.
Modify the Polarize adjustment after it has been applied to an image
1 Select a photo with the Polarize adjustment applied to it.
2 In the Polarize area of the Adjustments inspector or the Adjustments pane of the Inspector HUD,
use the Intensity parameter controls to modify the strength of the adjustment.
67% resize factor