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There are seven selection tools as shown in the figure. Each has unique characteristics, but
they all share few properties:
Ð ÐMode: The selection’s creation method, including whether it will be mixed with other
choices, is determined by the mode. Replace, Add, Subtract, and Intersection are
different modes of selection tools.
Replace: It will cause existing selection is replaced by new selection.
Add: It will cause new selection to be added to existing selection.
Subtract: It will remove the new selection from existing selection.
Intersection: It will overlap the new selection with existing selection i.e. final selection
contains the area common to both the selections.
Ð ÐAntialiasing: It makes the selection’s boundaries more smoothly drawn.
Ð ÐFeather edges: This results in a fuzzy selection boundary.
Let us have a look at the various selection tools.
Icon Tool Description
Rectangle Makes a rectangle-shaped area selection. Making a rectangular selection is as easy as clicking
Selection Tool and dragging. When you let go of the mouse, the selection is made.
Ellipse Selection Selects an area with an elliptical shape (a circular shape). All you have to do is click and drag to
Tool make an elliptical selection. When you let go of the mouse, the selection is made.
Free Select Tool Enables you to use your mouse pointer to freely draw a selection. When you let go of the
(Lasso Tool) mouse button, a straight line is drawn from the pointer’s present location to the selection’s
beginning point. You have the option to leave the image display’s edge and then return.
Foreground Foreground select tool usage involves two steps. You first create a selection that includes the
Select Tool entire object. You then use a brush to paint over the chosen region while remaining inside the
bounds of the object. When you’re finished, let go of the mouse button and check your objects
to see if they have any dark blue spots. If there are any, paint over them once again with the
brush before letting go to narrow the selection. Press Enter, and your object will be picked once
there are no more blue patches inside the object.
Fuzzy Select Tool Allows you to make a selection depending on adjacent areas of a similar colour spectrum. The
(Magic Wand) location at which you click and the Threshold value determine the colour range (within the
Tool Options dialog).
Select by Color Enables you to pick areas of an image that have a similar spectrum of colours. This tool and
Tool the Fuzzy Select tool are different in that the latter only selects continuous pixels, or those
that are close to one another. On the other hand, the By Color Select tool selects every pixel
that falls within the colour range, regardless of where it is on the image.
Intelligent When attempting to select an area with prominent colour changes at the boundaries, this
Scissors Tool tool can be helpful. To utilise the Intelligent Scissors, click the edges of the zone you want to
pick in order to generate a collection of “control nodes,” also known as anchors or control
points. Following any high-contrast edges it can locate, the tool creates a continuous curve
that passes through these control nodes.
Note that a good, smooth path is not always produced by this tool. Instead, the Path tool is
more frequently used by knowledgeable GIMP users.
Perform the following steps to use selection tools on images:
Step 1: Open the image on which you want to apply selection tool.
Step 2: In the GIMP toolbox, click on the selection tool icon. The selection tool can also be chosen by clicking the
desired Selection tools after choosing Tools from the program’s menu. To pick the desired area, the tool of
choice is dragged over the visible portion of the image.
234 Touchpad Web Applications-XI

