Display Enhancement

Brightness, Contrast, Saturation (Color), and Hue (Tint)

Working in the YCbCr color space simplifies the implementation of brightness, contrast, saturation, and hue controls, as shown in Figure 5.1. Also illustrated are multiplexers to allow the output of black screen, blue screen, and color bars.

Alert!

The designer should ensure that no overflow or underflow wraparound errors occur, effectively saturating results to the 0 and 255 values.

Figure 5.1. Hue, Saturation, Contrast, and Brightness Controls.

Many displays also use separate hue and saturation controls for each of the red, green, blue, cyan, yellow, and magenta ...

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