Graphics Programs Reference
In-Depth Information
The Highlights range option enables you to
recover information that was recorded in the
file but that is not currently visible. Although
most of the time you'll want to use the
Recovery slider for this purpose because it's
easier, if the Recovery function isn't giving
you the results that you hoped for, you can
use Curves in the highlight range. One of the
advantages of this is that you can apply high-
light recovery per channel, which may yield
better results with some images. In addition,
you can opt to brush the effect in or out,
thereby controlling where highlights are
recovered and leaving specular highlights in
other areas for more natural results. To use
the Extended range to recover data, do the
following:
6.31
Using the Shadow option enables you to
make more precise adjustments to the shadows.
1.
Choose Extended from the Range
pop-up menu in Curves.
The curve changes so that the curve occupies only one-fourth
of the dialog and shows how much information is not currently visible. Most of the time
we set the Channel pop-up menu to RGB and primarily affect the luminosity of the
image; however, you can also opt to work in one channel at a time by choosing the indi-
vidual channel and alter the color of the image.
2.
Move the White Point control over the right edge of the histogram data.
Initially,
this decreases the contrast in the image.
3.
Move the point that's already on the curve up to the original line of the curve.
This
restores contrast to the image.
4.
Lock down the curve to the left of that point by carefully adding three points close
together to make sure that the changes you make in the extended range don't
affect the rest of the image.
