Removing Fringe Pixels From A Selection; (Photoshop); Extracting Objects From Their Background - Adobe PHOTOSHOP 6.0 Manual

CHAPTER 5
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Selecting
Removing fringe pixels from a
selection (Photoshop)
When you move or paste an anti-aliased selection,
some of the pixels surrounding the selection
border are included with the selection. This can
result in a fringe or halo around the edges of the
pasted selection. These Matting commands let you
edit unwanted edge pixels:
Defringe replaces the color of any fringe pixels
•
with the colors of nearby pixels containing pure
colors (those without background color). For
example, if you select a yellow object on a blue
background and then move the selection, some of
the blue background is selected and moved with
the object. Defringe replaces the blue pixels with
yellow ones.
• Remove Black Matte and Remove White Matte
are useful when you want to paste a selection
anti-aliased against a white or black background
onto a different background. For example,
anti-aliased black text on a white background has
gray pixels at the edges, which are visible against a
colored background.
You can also remove fringe areas by using the
Advanced Blending sliders in the Layer Styles
dialog box to remove, or make transparent, areas
from the layer. In this case, you would make the black
or white areas transparent. Alt-click (Windows) or
Option-click (Mac OS) on the sliders to separate
them; separating the sliders allows you to remove
fringe pixels and retain a smooth edge.
To decrease a fringe on a selection:
Choose Layer > Matting > Defringe.
1
Enter a value in the Width text box for the
2
distance to search for replacement pixels. In most
cases, a distance of 1 or 2 pixels is enough.
Click OK.
3
To remove a matte from a selection:
Choose Layer > Matting > Remove Black Matte or
Layer > Matting > Remove White Matte.
Adjust the view as needed:
1
To magnify an area, select the zoom tool ( ) in
•
the dialog box, and click in the preview image.
To zoom out, hold down Alt (Windows) or
Option (Mac OS) as you click.
To view a different area, select the hand tool in
•
the dialog box, and drag in the preview image.
Extracting objects from their
background (Photoshop)
The Extract command provides a sophisticated
way to isolate a foreground object and erase its
background on a layer. Even objects with wispy,
intricate, or undefinable edges may be clipped
from their backgrounds with a minimum of
manual work.
Note: For simpler cases, you can instead use the
background eraser tool.