color parameters

Brightness  -128 ~ 127, usually set in the register as (8-bit) 2’s complement form.  1(1), 0x7F(127) is the brightest. 0x80(-128) is the darkest, 0xFF (-1).
Contrast (luminance contrast gain)  -128 ~ 127, 100(64h) means a gain of 1. Increase of contrast by “1” means adjustment of gain by %1.
Saturation(chroma gain, for U and V)  -128 ~ 127
Hue  +36 to –36. Only effective on NTSC system. The positive value gives greenish tone and negative value gives purplish tone.
Sharpness (for luma)  0 ~ 15. 15 provide the strongest sharpness.

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