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Creative Glossary > Digital Fine Art Print Making > Alpha Channel
Term Details
Term: Alpha Channel
Subcategory: Equipment
Definition: An alpha channel is an image-editor channel; individuals use it to hold a mask, partial picture element or color.  It determines the transparency of every color in an image.  It originated in 1997 by Alvy Ray Smith and Ed Catmull at N.Y.I.T.  The alpha channel would be the 4th channel in a 3-color image.

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