|
Raster selection tools (top to bottom): Selection Tool,
Freehand Selection Tool and Magic Wand.
A few of the shapes available to use with the Selection
tool.
Triangle selections with Antialias turned
on (left) and off.
|
|
Selection tool
PSP offers three main tools for raster selections: Selection tool, Freehand
Selection tool and Magic Wand. The Selection tool, shown at the top
of the image at the left, will create a fixed shape selection. You choose
the selection type from the Tool Options window, with the various shapes
in the drop down menu shown at the left
To create a selection, activate the Selection Tool, choose your desired
shape from the Tool Options window, and click and drag to create a selection
of the size you require. When you release the mouse button, the moving
dashed outline will appear. The image below shows the selection in progress,
along with the settings in the Tool Options window.
Selection tool options
For straight line selections, like rectangle, square and lines, you
will want to uncheck the Antialias box in the Tool Options window. This
function adds a slight feathering to the edge of the selection which
is usually not desired for a straight line shape. For selections with
curved or angled lines, like triangles or circular shapes, you will
want the Antialias checked. See left for the difference.
You can also feather your selection in the Selection tool Option window,
which softens the edges of the selection. I prefer to add feathering
as an after effect, since it is usually important to do the main selection
accurately. You can add feathering to your selection by choosing Selections>Modify>Feather
and specifying a value for the number of pixels you would like to have
softened. The effect is exactly the same as choosing Feather in the
Options window.
|
 |
|
Freehand Selection tool
The Freehand Selection tool allows you to create – surprise –.
freehand selections. You have your choice of three methods to create
irregular selections. The Freehand option allows you to create selections
that simply follow your mouse. The images at the left were all traced
with the Freehand option.
To create this selection, activate the Freehand Selection tool, choose
Freehand from the Freehand Selection Type drop-down in the Options window,
and click and drag around the area you would like to select. When you
release your mouse button, the ending point will join to the start point
in a straight line. If you wish to smoothly connect the end with the
start of the selection, it is most accurate to release your mouse button
when you are a few pixels away from the start point. If you try to land
exactly on the start point, you may end up with a tiny bump in the selection.
|
|
The Point to Point selection tool allows easy selection
using straight lines.
|
|
Point to Point selection
If you require straight edged selections, as opposed to the curves so
easily created by the Freehand option, it is best to select the Point
to Point method to create your selection.
To create a section with this option, activate the Freehand Selection
tool, and choose the Point to Point option from the Selection Type drop-down
menu in the Options window. Click and release at the point you would
like to start your selection. Move your mouse to the next place you
would like to place a corner and click. Continue clicking new lines
until you have the selection you desire. Double-click to set the selection.
The end point will be joined to the beginning and the straight lines
will change to the dashed, moving selection boundary.
|
|
Clicking around the edge of an object with the Smart
Edge selection tool ideally snaps a selection border right along the
edge. In reality, it is usually not perfect and will need editing.
|
|
Smart Edge selection tool
The Smart Edge selection tool is designed to automatically select along
the edge of an irregular object. Your success with this tool will depend
a lot on the quality of the edge you are trying to select. I am not
a huge fan of automatic edge selection, since I find that when the situation
is right for them to actually work, usually there is an easier method
for selection, like the Magic Wand that follows.
However, in the interest of a complete subject study, and that once
in a while automatic edge selection works like a charm, we will look
at the Smart Edge selection tool.
Activate the Freehand Selection tool and choose Smart Edge from the
drop-down menu in the Options window. Click and release exactly on the
edge you would like to select. Move to the first change in direction
on the object edge and click and release again. A faint blue line is
placed along the edge as soon as you click on the object. Double click
to end your selection. The image at the left shows a magnified view
of the selection in progress.
If your edge is very clean, you can achieve a very good selection this
way. You will most likely need to fine tune the selection by adding
or subtracting from the selection, which we will cover later in this
article.
Smart Edge selection tool options
You have the same feathering and antialiasing options that we discussed
above with this tool. In addition, you will have the option to select
that the selection will be created around objects that are located on
different layers. Technically this is true. In actual use though, I
have found that there is little difference between having Sample Merged
turned on or off with the Smart Edge selection tool. In reality, you
will have a hard time getting a good selection across layers no matter
what your setting.
Now that I have given a less than enthusiastic review of the Smart
Edge tool, lets move on to one of my favorite selection methods –
the Magic Wand. |
