Adobe photoshop cs2 사용자 설명서
ADOBE PHOTOSHOP CS2
User Guide
336
Extracting selections
The Extract filter
The Extract filter dialog box 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. You use tools in the Extract dialog box to specify which part of the image to extract. You
can resize the dialog box by dragging its lower right corner.
a layer. Even objects with wispy, intricate, or undefinable edges may be clipped from their backgrounds with a
minimum of manual work. You use tools in the Extract dialog box to specify which part of the image to extract. You
can resize the dialog box by dragging its lower right corner.
For simpler cases, try using the Background Eraser tool.
When you extract the object, Photoshop erases its background to transparency. Pixels on the edge of the object lose
their color components derived from the background, so they can blend with a new background without producing
a color halo.
their color components derived from the background, so they can blend with a new background without producing
a color halo.
Selected area highlighted and filled, and extracted object
You can add back opacity to the background and create other effects by using the Edit > Fade command after an
extraction.
extraction.
See also
To extract an object from its background
1
In the Layers palette, select the layer containing the object you want to extract. If you select a background layer, it
becomes a normal layer after the extraction. If the layer contains a selection, the extraction erases the background
only in the selected area.
only in the selected area.
To avoid losing the original image information, duplicate the layer or make a snapshot of the original image state.
2
Choose Filter > Extract, and then specify tool options:
Brush Size
Enter a value, or drag the slider to specify the width of the Edge Highlighter tool
. You also use the
Brush Size option to specify the width of the Eraser, Cleanup, and Edge Touchup tools.
Highlight
Choose a preset color option for the highlight that appears around objects when you use the Edge
Highlighter tool, or choose Other to pick a custom color for the highlight.
Fill
Choose a preset color option, or choose Other to pick a custom color for the area covered by the Fill tool.