Basic Techniques for Preparing Digital Images

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Unit 2 Color: 8 of 23

Remember bit-depth

Key Point: color bit depth refers to the number of bits used to describe the color of a single pixel. 

The bit depth determines the number of colors that can be displayed at one time. Take a look at the following table to see the number of colors different bit depths can produce:

Bit-Depth

Number of Colors

1

2 (monochrome)

2

4 (CGA)

4

16 (EGA)

8

256 (VGA)

16

65,536 (High Color, XGA)

24

16,777,216 (True Color, SVGA)

32

16,777,216 (True Color + Alpha Channel)

 

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