CNET GLOSSARY: Terms for the techie
In computer graphics, each pixel has three channels of color information--red, green, and blue--in various bit depths. With 24-bit graphics, there are 8 bits per color per pixel; with 32-bit graphics, the additional 8 bits are used as an alpha channel to control attributes for the other 24 bits of color. One such type of control is alpha blending.
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