What is the channel of Photoshop?

Source: Internet
Author: User

Channel in RGB mode is the red, green, blue three-color channel, which together determines the color and brightness of the image, as well as the concept of alpha channel, the alpha channel is used to save the selection (selection) information, Editing and modifying the alpha channel does not affect the color and brightness of the original image, but only the selection.

For example, when you make a selection, you can use Selection>save seletion to have it #4 channel, the alpha channel, which can be paged out selection>load selection. Some file formats can hold information about alpha channels, such as Psd,tif, and so on.

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