Graphics Programs Reference
In-Depth Information
To protect a range of tones so that
they are not affected by changes you
make at other places along the curve,
lock the curve in that area by placing
three points fairly close together . That
way when you adjust other points along
the curve, that portion of the curve
remains unaffected.
Figure 6.29 shows a Curves adjustment and
Figure 6.30 compares an image before and
after applying this Curves adjustment.
6.29 The Curves adjustment used in the “after”
version in Figure 6.30.
6.30 Using Curves is an excellent way to bring out detail in your image and correct exposure issues.
Aperture 3's Curves adjustment enables you to work more specifically with the shadows and high-
lights in the image. To magnify the shadow portion of the curve so that you can make finer adjust-
ments within it, choose Shadows from the Range pop-up menu. The curve display changes, as
shown in Figure 6.31 to show just the lower quarter of the tonalties, meaning the shadow portion
of the image. Make any adjustments that are needed and then change back to Normal range to
make adjustments elsewhere on the curve.
 
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