alpha channel
alpha channel · alpha channels
A numerical value specifying a level of translucency to be applied to a colourA numerical value specifying a level of translucency to be applied to a colour.
Meaning
1 sensesA numerical value specifying a level of translucency to be applied to a colour.
Translations
1 languagesOrigin
Coined by Alvy Ray Smith and Ed Catmull in the 1970s. Smith writes: "We called it that becCoined by Alvy Ray Smith and Ed Catmull in the 1970s. Smith writes: "We called it that because of the classic linear interpolation formula αA+(1-α)B that uses the Greek letter α (alpha) to control the amount of interpolation between, in this case, two images A and B". That is, when compositing image A atop image B, the value of α in the formula is A's alpha channel.
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Forms
plural: alpha channels| Singular | alpha channel |
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| Plural | alpha channels |
regular