2.7. 色域選択

2.7. 色域選択
	2. 選択ツール

The Select by Color tool is designed to select areas of an image based on color similarity. It works a lot like the Fuzzy Select tool. The main difference between them is that the Fuzzy Select tool selects contiguous regions, with all parts connected to the starting point by paths containing no large gaps; while the Select by Color tool selects all pixels that are sufficiently similar in color to the pixel you click on, regardless of where they are located.

2.7.1. 呼び出し方

There are different possibilities to activate the tool:

From the main menu: Tools → Selection Tools → By Color Select.
By clicking the tool icon in the Toolbox.
By pressing the Shift+O keyboard shortcut.

2.7.2. キー修飾

色域選択に固有の修飾キーはありません。選択ツールに共通のものなら同じように使えます。詳しくは選択ツールをお読みください。

2.7.3. ツールの操縦

図14.23 色域選択ツールを使用: 選択された画素は連続しているとは限らない

As with the Fuzzy Select tool, the selection starts as soon as you click and the reference is the first clicked pixel. If you click and drag, you can change the threshold by the same way as with the Fuzzy Select tool.

You can move the selection outline with the arrow keys, not with the mouse.

2.7.4. オプション

図14.24 Tool Options Dialog

Normally, tool options are displayed in a window attached under the Toolbox as soon as you activate a tool. If they are not, you can access them from the main menu through Windows → Dockable Windows → Tool Options which opens the option window of the selected tool. The available tool options can also be accessed by double clicking the corresponding tool icon in the Toolbox.

モード, なめらかに, Feather edges

	注記
	See Selection Tools Options for help with options that are common to all these tools. Only options that are specific to this tool are explained here.

Select transparent areas, Sample merged, しきい値, Select by, Draw mask

These options work exactly the same way they are described for the Fuzzy Select tool. See 「オプション」 for details.