An alpha channel is used to determine what attribute in digital images?

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Prepare for the Georgia EOPA AVTF Level 3 Test with flashcards and multiple-choice questions. Every question includes hints and explanations to help you succeed!

Multiple Choice

An alpha channel is used to determine what attribute in digital images?

Explanation:
An alpha channel encodes per-pixel opacity to control transparency. It lets you composite images by blending layers, where each pixel’s alpha value determines how much of the image versus what’s behind it shows through. Brightness, color temperature, and saturation describe how light or color the pixel appears, but they come from other data or channels and don’t control transparency. So the alpha channel is specifically about how transparent a pixel is during blending.

An alpha channel encodes per-pixel opacity to control transparency. It lets you composite images by blending layers, where each pixel’s alpha value determines how much of the image versus what’s behind it shows through. Brightness, color temperature, and saturation describe how light or color the pixel appears, but they come from other data or channels and don’t control transparency. So the alpha channel is specifically about how transparent a pixel is during blending.

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