Apple Aperture 3.5 User Manual
Page 286
Chapter 7
Make image adjustments
286
7
To set a point along the curve, do one of the following:
•
Click the Add Point button and use the eyedropper tool to sample a portion of the image.
Click the Add Point
button to use the
eyedropper tool to
sample a portion of
the photo and add a
point to the tonal curve.
Click the tonal curve
to add a new point, and
drag the new point to
set the tonal value.
Note: You can change the Loupe’s color value sample size by choosing an option from the
Adjustment Action pop-up menu
. For more information, see
on page 339.
•
Click a place on the curve where you want to add a point.
Aperture places a point on the curve in the exact tonal range of the sampled area of
the image.
8
To adjust the shape of the curve, do one of the following:
•
Drag the point on the curve until that tonal area of the image looks correct.
For example, dragging a point down in the shadow area of the curve darkens the shadows in
the image, and dragging a point up in the shadow area lightens the shadows in the image.
•
Click a point on the curve and enter new In point and Out point values in the In and Out fields.
The In point values represent the horizontal axis of the graph, and the Out point values
represent the vertical axis of the graph.
Points on the curve that are not selected remain anchored, allowing you to independently adjust
each tonal area.
Darkening the shadows
and lightening the
highlights creates an
S-curve, indicating that
the photo’s contrast
is increased.
9
Repeat steps 7 and 8 for each tonal area in the image that you want to correct.
The tonal values in the image are adjusted, giving the image the appropriate amount of contrast.
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