Gimp - 2.4 ユーザーガイド
GNU Image Manipulation Program
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Note
See Section
See Section
for help with options that are common to all these tools. Only options that are specific to the Select
by Color tool are explained here. Note that they are the same options as the Magic Wand tool has.
You can find the Magic Wand options by double-clicking on the
icon in the Toolbox.
Finding Similar Colors These options affect the way the Select by Color tool expands the selection out from the initial point.
• Select Transparent Areas This option gives the Select by Color tool the ability to select areas that are completely
transparent. If this option is not checked, transparent areas will never be included in the selection.
• Sample Merged This option becomes relevant when you have several layers in your image, and the active layer is either
semi-transparent or is set to another Layer Mode than Normal. If this is the case, the colors present in the layer will be
different from the colors in the composite image. If the "Sample Merged" option is unchecked, the Select by Color tool
will only react to the color in the active layer when it creates a selection. If it is checked it will react to the composite
color of all visible layers. For further information, see the glossary entry
different from the colors in the composite image. If the "Sample Merged" option is unchecked, the Select by Color tool
will only react to the color in the active layer when it creates a selection. If it is checked it will react to the composite
color of all visible layers. For further information, see the glossary entry
• Threshold This slider determines the range of colors that will be selected: the higher the threshold, the larger the
resulting selection.
Note
Regarding moving selection, this tool doesn’t work like others: when selection by color is created, you can move it only
if you select another selection tool...
Regarding moving selection, this tool doesn’t work like others: when selection by color is created, you can move it only
if you select another selection tool...
12.2.7
Scissors Tool
Figure 12.14: Intelligent Scissors tool icon in the Toolbox.
The Intelligent Scissors tool is an interesting piece of equipment: it has some features in common with the Lasso, some features
in common with the Path tool, and some features all its own. It is useful when you are trying to select a region defined by strong
color-changes at the edges. To use the Scissors, you click to create a set of "control nodes" at the edges of the region you are
trying to select. The tool produces a continuous curve passing through these control nodes, following any high-contrast edges it
can find. If you are lucky, the path that the tool finds will correspond to the contour you are trying to select.
in common with the Path tool, and some features all its own. It is useful when you are trying to select a region defined by strong
color-changes at the edges. To use the Scissors, you click to create a set of "control nodes" at the edges of the region you are
trying to select. The tool produces a continuous curve passing through these control nodes, following any high-contrast edges it
can find. If you are lucky, the path that the tool finds will correspond to the contour you are trying to select.
Each time you left-click with the mouse, you create a new control point, which is connected to the last control point by a curve
that tries to follow edges in the image. To finish, click on the first point (the cursor changes to indicate when you are in the right
spot). You can adjust the curve by dragging the control nodes, or by clicking to create new control nodes. When you are satisfied,
click anywhere inside the curve to convert it into a selection.
that tries to follow edges in the image. To finish, click on the first point (the cursor changes to indicate when you are in the right
spot). You can adjust the curve by dragging the control nodes, or by clicking to create new control nodes. When you are satisfied,
click anywhere inside the curve to convert it into a selection.