### 8.25. Compor

#### 8.25.1. Panorama

Figura 16.172. Exemplo para o comando“Compor”

Imagem decomposta (Decomposição RGB)

“Compor” aplicado

This command constructs an image from several grayscale images or layers, for instance from extracted RGB, HSV, etc. components. You can also build an image from grayscale images or layers created independently.

#### 8.25.2. Activating the Command

You can access this command from the main menu through Colors → Components → Compose…. It is enabled if your image is grayscale.

#### 8.25.3. Opções

Figura 16.173. Opções do comando “Compor”

Compor Canais

  Here you can select the color space to be used: RGB, HSV, etc. The available options are described in the Decompose command.

Representação de Canais

  Allows you to select which layer or image will be used for each channel. You may use this option, for example, to exchange color channels:

  Figura 16.174. Exemplo de representação de canais: trocar dois canais

  Imagem Original

  Decomposta em camadas

  Composed image after using Channel Representation to switch red and green channels

  Valor da máscara: Ao invés de selecionar uma camada ou uma imagem para construir o canal, você pode atribuir um valor ao canal de 0 até 255. Mas note que pelo menos um canal deve ser formado por uma imagem ou camada.

| Dica
If you use different settings in Compose than when you used Decompose, for instance an image decomposed to RGB then re-composed to LAB, you will get interesting color effects. Test it!

8.24. Mono Mixer |  | 8.26. Decompor

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