Apple Aperture 3.5 - Manual (Page 275)

Chapter 7 Make image adjustments 275
Adjust definition in an image
The Definition parameter is useful for adding local contrast (adding contrast only to the areas of
the image that need a contrast adjustment) as well as reducing haze.
1 Select a photo.
2 In the Enhance area of the Adjustments inspector or the Adjustments pane of the Inspector HUD,
use the Definition parameter controls to add clarity and definition to the image.
Use the Definition slider
and value slider to add
local contrast to the photo.
A value greater than 0.0 increases the clarity in the image.
Change the saturation of an image
Increasing the saturation of an image can make the colors appear more pure, and many people
like the effect of an image whose colors are more saturated than they would appear naturally.
However, you can easily oversaturate an image. In the process of making the colors more pure,
subtleties in shades of colors disappear, often resulting in reduced detail in the image. To ensure
that visual elements aren’t unnecessarily lost, pay attention to the details in your image as you
increase saturation.
1 Select a photo.
2 In the Enhance area of the Adjustments inspector or the Adjustments pane of the Inspector HUD,
use the Saturation parameter controls to add a burst of color to an image, or remove color from
an image.
Use the Saturation slider
and value slider to adjust
the saturation of colors
in the photo.
A value below 1.0 decreases the color saturation in the image, and a value above 1.0 increases
the saturation. A value of 0.0 removes all color from the image, making it grayscale. A value of
4.0 increases the saturation by 400 percent.
67% resize factor