2.7. Výběr podle barvy

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. Activating the Tool

There are different possibilities to activate the tool:

  • From the main menu: ToolsSelection ToolsBy Color Select.

  • By clicking the tool icon in the Toolbox.

  • By pressing the Shift+O keyboard shortcut.

2.7.2. Key modifiers (Defaults)

Nástroj Výběr podle barvy nemá žádné zvláštní modifikační klávesy, pouze ty, které stejným způsobem ovlivňují všechny nástroje pro tvorbu výběru. O těch se více dozvíte v části Nástroje pro výběr.

2.7.3. Handling tool

Obrázek 14.24. Using Select by Color tool: selected pixels are not only contiguous

Using Select by Color tool: selected pixels are not only contiguous

As with fuzzy 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 tool.

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

2.7.4. Options

Obrázek 14.25. Volby nástroje Výběr podle barvy

Volby nástroje Výběr podle barvy

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 WindowsDockable WindowsTool Options which opens the option window of the selected tool.

[Poznámka] Poznámka

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, Draw mask

These three options work exactly the same way they were described for the fuzzy selection already. See for 2.6.4 – „Options“ details.