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Digital Imaging
Unit 8: Enhancing Specific Selections & Adjusting Colors
Module 2: Creating and Saving Alpha Channels
Alpha Channels
Alpha channels are the areas of an
image where masks are stored.
(You may recall a mask is an area
of the image that is protected
from editing).
Digital Imaging
Unit 8: Enhancing Specific Selections & Adjusting Colors
Module 2: Creating and Saving Alpha Channels
Alpha Channels
To create an alpha channel:
Click the New Channel button at
the bottom of the Channels panel.
Using the paintbrush tool, paint
on the new channel to mask out
image areas.
Digital Imaging
Unit 8: Enhancing Specific Selections & Adjusting Colors
Module 2: Creating and Saving Alpha Channels
Alpha Channels
To edit an alpha channel:
Use the paintbrush tool to add or
delete areas on the mask.
Painting with black increases the
masked area.
Painting with white increases the
selected area.

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Wd133 unit 8 module 2 creating and saving alpha channels

  • 1. Digital Imaging Unit 8: Enhancing Specific Selections & Adjusting Colors Module 2: Creating and Saving Alpha Channels Alpha Channels Alpha channels are the areas of an image where masks are stored. (You may recall a mask is an area of the image that is protected from editing).
  • 2. Digital Imaging Unit 8: Enhancing Specific Selections & Adjusting Colors Module 2: Creating and Saving Alpha Channels Alpha Channels To create an alpha channel: Click the New Channel button at the bottom of the Channels panel. Using the paintbrush tool, paint on the new channel to mask out image areas.
  • 3. Digital Imaging Unit 8: Enhancing Specific Selections & Adjusting Colors Module 2: Creating and Saving Alpha Channels Alpha Channels To edit an alpha channel: Use the paintbrush tool to add or delete areas on the mask. Painting with black increases the masked area. Painting with white increases the selected area.