Select the Polygonal Lasso tool in the toolbox from the available Lasso options, and click to create a point; then, move and click to create straight lines between the two points.. Click
Trang 1The Polygonal Lasso creates straight-line selections, perfect for creat-ing a selection around a windowpane or the roofline of a house Select the Polygonal Lasso tool in the toolbox from the available Lasso options, and click to create a point; then, move and click to create straight lines between the two points Keep clicking and moving your mouse until the desired selection shape appears Double-clicking the mouse instructs the Polygonal Lasso tool to close the selection shape
Using the Polygonal
Lasso Tool
Use the Polygonal Lasso Tool
Select the Polygonal Lasso tool on
the toolbox
Click the Tool Preset list arrow,
and then select from the available
tool presets
Use the selection options on the
Options bar to create a new
selection, or add to, subtract from,
or intersect with an existing
selection
Enter a numerical value (0 to 250)
in the Feather box to create a
feathered selection edge or click
the Refine Edge box to visually
fine-tune your feather size
Select the Anti-alias check box to
create a softer selection (useful
with intensely rounded or curved
selections)
Click to create anchor points, and
then double-click or click the
starting point to complete the
selection
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Did You Know?
You can temporarily use the Polygonal
Lasso tool as a freeform Lasso tool
Hold down the Alt (Win) or Option
(Mac) key, and then drag to draw
Release the mouse to return to the
Polygonal Lasso tools
Trang 2The Quick Selection tool makes it easier to select the areas of an image you want Simply paint a loose selection using an adjustable round brush tip to select the area you want As you paint with the Quick Selection tool, the selection expands outward and automatically finds and follows defined edges in the image You can also enable the Auto-Enhance option to reduce roughness and pixelation in the selection edge
Using the Quick
Selection Tool
Use the Quick Selection Tool
Select the Quick Selection tool on
the toolbox
Click the Tool Preset list arrow,
and then select from the available
tool presets
Use the selection options on the
Options bar to create a new
selection, or add to/subtract from
an existing selection
Click the Brush list arrow, and then
select the brush options you want:
Diameter, Hardness, Spacing,
Angle, Roundness, and Size
Select the Sample All Layers
check box to create a selection
based on all layers, not just the
currently selected one
Select the Auto-Enhance check
box to reduce roughness and
pixelation in the selection edge
Paint with the Quick Selection tool
to create the selection you want
TIMESAVER Press the right
bracket (]) or left bracket ([) to
increase or decrease the Quick
Selection tool brush size
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Trang 3The Magic Wand tool (so named since it looks like a magic wand) is unique in the fact that you do not drag and select with this tool; you simply click The Magic Wand tool creates a selection based on the shift in brightness ranges within an image If there is a definable shift in the brightness of the pixels, it can be a very powerful tool for the selec-tion of odd-shaped areas For example, a brightly colored sunflower contrasted with a bright blue sky would be a snap for the Magic Wand tool To use the Magic Wand, click on the Magic Wand Tool button in the toolbox Sometimes it's easier to select what you don't want In this example, the blue sky was selected and removed However, you might have wanted to select the sunflower, and move it into another image If that's the case, it is still easier to select the sky using the Magic Wand, click the Select menu, and then click Inverse to reverse the selection
Using the Magic
Wand Tool
Use the Magic Wand Tool
Select the Magic Wand tool on the
toolbox
Use the Preset Tool list arrow, and
then select from the available tool
presets
Use the selection options on the
Options bar to create a new
selection, or add to, subtract from,
or intersect with an existing
selection
Enter a Tolerance value (0 to 255)
The higher the value, the more
information the Magic Wand tool
selects
Select the Anti-alias check box to
create a softer selection (useful
with intensely rounded or curved
selections)
Select the Contiguous check box
to select adjacent pixels within the
active document
Select the Sample All Layers
check box to sample image
information from all layers
Click an area to make a selection
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Results of the Magic Wand tool
Trang 4Photoshop makes selection easy by giving you ways to draw selection borders in any shape, size, or form However, selection is more than dragging your mouse across the screen to create a selection In addi-tion to standard drawing tools, Photoshop lets you select image informa-tion based on channel color informainforma-tion Maybe it's that bright red car
in your background, or the white stucco finish adorning an adobe house
It doesn't matter, because Photoshop lets you choose the color and the maximum range to select When you work with the Color Range option, the image displayed in the dialog box becomes a mix of black and white
The white areas represent the selected portions of the image, while the black areas represent the masked portions of the image
Selecting by Color
Range
Selection by Color Range
Click the Select menu, click Color
Range, and then select an option:
◆ Select Lets you choose
Sampled Colors, a specific
color, or Out-of-Gamut colors.
◆ Localized Color Clusters.
Select when you want to
constrain your color selection
to a specific area Use the
Range slider to fix the distance
to use with the localized color
selection
◆ Selection or Image Lets you
view the Selection Mask or the
Image
◆ Selection Preview Changes
the view of the image in the
document window Select
None, Grayscale, Black Matte,
White Matte, or Quick Mask
Click the eyedroppers to add to or
subtract from colors from the
selection, and then click within
the image
Click the Fuzziness slider to
increase or decrease the color
values selected (0 to 200)
Select the Invert check box to
reverse the Selection Mask
Click OK to turn the color range
information into a selection
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Trang 5After you make the initial selection, you can use the Refine Edge tool to fine-tune the selection to your exact specifications The Refine Edge tool is useful for selecting elements with different edge types For example, you can select the edge around a ship in the ocean and then place it in front of a different background With the Smart Radius and Decontaminate Colors options (New !), you can create precise selec-tions for complex elements Smart Radius automatically creates the best selection for the elements changing edge, while Decontaminate Colors removes the background color around the edge If the selection
is not quite right, you can use the Refine Radius and Erase Refinements tools (New !) to expand the selection or restore it back to the original selection These tools also work well with the Decontaminate Colors option to remove residual background color from around the edges of a selection In addition, you can make selection adjustments using the following slider options: Radius, Smooth, Feather, Contrast, and Shift Edge As you work with a selection, you can change the view mode (New !) to preview the selection against different backgrounds—such
as overlay, on black or white, or on layers—in order to fine-tune it
Refining a Selection
Edge
Use the Refine Edge Tool
Use one of the selection tools to
make a selection
Click Refine Edge on the Options
bar, or click the Select menu, and
then click Refine Edge.
To change the view size or position,
use the Zoom or Hand tools.
To change the view modes, click a
Selection View list arrow, and then
select a view (New!)
◆ Show Radius Select to view by
the radius defined selection
◆ Show Original Select to view
by the original selection
Specify an edge detection option
◆ Smart Radius Select to
automatically apply the best
radius to create an accurate
selection (New!)
◆ Radius Drag the slider to
specify the size of the selection
Increase to create a more exact
selection
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Trang 6To refine the selection, use any of
the following tools (New!):
◆ Refine Radius Tool Select and
drag to expand the selection
area
◆ Erase Refinements Tool Select
and drag to restore the original
selection edge
Drag the sliders to adjust the edge
of the selection
◆ Smooth Smooths out the rough
edges of the selection (0-100)
◆ Feather Creates a soft edge
around the selection (0-250 px)
◆ Contrast Sharpens the selection
edges and removes fuzziness
◆ Shift Edge Decreases or
increases the selection edge
Click the Output To list arrow, and
then select an option, such as
Selection, Layer Mask, or New
Document (New!)
◆ Decontaminate Colors Removes
background color around the
edge by the amount (%)
◆ You can also use this option
along with the Refine Radius
and Erase Refinements tools
to remove residual
background color from
around the edges of a
selection
To remember your settings for use
next time, select the Remember
Settings check box ( New!)
Click OK.
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Overlay view