Graphics Programs Reference
In-Depth Information
Note
Ifyoucan'tfindasettingthatremovesallofthebackgroundwithoutaffect-
ing the subject, specify a value that leaves the entire subject visible along
with small bits of the white background. You'll eliminate the remaining
white background by fine-tuning the clipping path in the following steps.
6.
Drag the Threshold slider until the Threshold setting hides as much of the white
background as possible without hiding parts of the subject (darker areas). This ex-
ample uses a Threshold value of 20.
The Threshold setting hides light areas of the image, starting with white. As you
drag to the right to choose a higher value, increasingly darker tones are included
within the range of tones that become hidden. Don't try to find a setting that
matches the pear perfectly. You'll learn how to improve the clipping path later.
7.
Drag the Tolerance slider slightly to the left until the Tolerance value is approxim-
ately 1.
The Tolerance option determines how many points define the clipping path that's
automatically generated. As you drag to the right, InDesign uses fewer points so
that the clipping path fits the image more loosely (higher tolerance). Using fewer
points on the path may speed up document printing but may also be less accurate.
