Serif PhotoPlus X3 ECD518624M Manual De Usuario
Los códigos de productos
ECD518624M
Manipulating Images
41
Soft-edged and hard-edged selections
Antialiasing and feathering are different ways of controlling what happens at
the edges of a selection. Both produce softer edges that result in smoother
the edges of a selection. Both produce softer edges that result in smoother
blending of elements that are being combined in the image. You can control
either option for the Standard and Adjustable Selection tools, using the Feather
input box (or slider) and Antialias check box on the Context toolbar.
either option for the Standard and Adjustable Selection tools, using the Feather
input box (or slider) and Antialias check box on the Context toolbar.
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Antialiasing produces visibly smooth edges by making the selection's
edge pixels semi-transparent. (As a layer option, it's not available on
edge pixels semi-transparent. (As a layer option, it's not available on
the Background layer, which doesn't support transparency.)
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If an antialiased selection (for example, one pasted from another
image) includes partially opaque white or black edge pixels, you can
use the Matting command on the Layers menu to remove these pixels
from the edge region, yielding a smoother blend between the selection
image) includes partially opaque white or black edge pixels, you can
use the Matting command on the Layers menu to remove these pixels
from the edge region, yielding a smoother blend between the selection
and the image content below. (Fully opaque edge pixels are not
affected.)
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Feathering reduces the sharpness of a selection's edges, not by varying
transparency, but by partially selecting edge pixels. If you lay down
paint on a feathered selection, the paint will actually be less intense
transparency, but by partially selecting edge pixels. If you lay down
paint on a feathered selection, the paint will actually be less intense
around the edges. You can apply feathering "after the fact" to an
existing selection (but before applying any editing changes) using the
Select menu's Modify>Feather... command. In the dialog, enter the
Select menu's Modify>Feather... command. In the dialog, enter the
width (in pixels) of the transition area. A higher value produces a
wider, more gradual fade-out.
wider, more gradual fade-out.
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Threshold converts a feathered, soft-edged selection into a hard-edged
selection (use Modify>Threshold). As with feathering, you won't see
selection (use Modify>Threshold). As with feathering, you won't see
an immediate effect on the image, but painting and other editing
operations will work differently inside the selection.
operations will work differently inside the selection.