What does channel mean in PS?

In photoshop, the channels are different in different image modes. The pixel color in the channel layer is composed of a set of brightness values of primary colors. The channel can actually be understood as the mapping of the selected area, that is, the selection.

What can the channel do

In the channel, most of the information of the image is recorded, which is closely related to your operation from beginning to end. Specifically, the main functions of the channel are:

1. Indicates the selection area, which is the part represented by white. Using channels, you can create precise selections like hair strands.

2. Indicates ink strength. You can appreciate this by using the Info panel. Different channels can use 256 levels of gray to represent different brightnesses. A pure red point in the Red channel is displayed as pure black on the black channel, that is, the brightness is 0.

3. Indicates opacity. In fact, this is the function we are most happy to use. Maybe you have seen a picture of a mountain gradually disappearing into the water, and have you ever been envious of it. So, just remember the passage!

4. Represents color information. You might as well experiment and preview the Red channel. No matter how you move the mouse, there will only be R value on the Info panel, and the rest will be 0.

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