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What is a channel in photoshop?

annehelene Posted messages 22 Status Member -  
sebsauvage Posted messages 33284 Registration date   Status Moderator Last intervention   -
Good evening
Could someone tell me what a "channel" is in Photoshop and how to create one? Thank you in advance.

5 answers

  1.
    sebsauvage Posted messages 33284 Registration date   Status Moderator Last intervention   15 684
     
    An image is composed of several channels (red, green, blue, and alpha for example, or cyan, magenta, yellow, etc.)

    A channel represents that component.

    For example, the "red" channel represents the amount of red for each pixel in your image.

    The types of channels depend on your color model (RGB, CMYK, L*a*b, etc.)

    Do not confuse channels with layers.
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  2. annehelene Posted messages 22 Status Member
     
    Thank you very much.
    In a tutorial, (where it explains how to create a smooth sphere), there comes a point where it asks to create a channel. It shows an image where, in the layers window, there are three different layers representing the sphere actually in Red, Green, and Blue.
    When it asks to "create a channel", does it mean to create 3 color layers RGB?
    Do you also know what the French translation of the term "channel" is in Photoshop tutorials?
    Thank you very much.
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  3. sebsauvage Posted messages 33284 Registration date   Status Moderator Last intervention   15 684
     
    When he asks "create a channel," does it mean creating 3 layers of RGB colors?

    No.
    We can create additional channels in grayscale.
    They don't correspond to anything (neither to red, green, nor blue), but we can use them later as a selection (for example).

    Do you also know what the French translation of the term "channel" is in Photoshop tutorials?

    No, I don't know.
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  4. annehelene Posted messages 22 Status Member
     
    Here we go. I've at least found the proposed translation for channel: in French, "photoshop" translates it as "couche."
    But I suppose this translation won't suit you!!!!!!!

    Thank you for your explanations. But I’ll insist: could you tell me the exact procedure (which button to click and....) to create a channel?
    In my version of PS, I don't have the little dotted circle icon in the bottom menu bar of the layers window that seems to be used for those damned "channels!!!"
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  6. sebsauvage Posted messages 33284 Registration date   Status Moderator Last intervention   15 684
     
    Thank you for your explanations. But I would like to insist: could you tell me the exact procedure (which button to click and....) to create a channel.

    I did this back in the day on Photoshop 4.
    And I no longer have Photoshop.
    I'm sorry...

    But it should normally be found in the Photoshop manual!
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