The color space determines the number of color components and how the components are interpreted. The alpha value determines the transparency of a color. Alpha transparency is one of the ...

Written by members of the development team at Apple, this unique guide describes the sophisticated graphics system of Mac OS X, and serves as an introduction to 2D graphics concepts, including how ...

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GIF supports a 1-bit channel, which means that an area marked as alpha can be either transparent or not but no levels in between. Layered graphics formats such as Photoshop's native PSD format can ...