The YUV color space

The YUV color space is used by the PAL and SECAM color television systems in many countries.

The luminance value Y and two color differences U, V can be expressed with the following formula:

U=(B-Y)/2.03 = 0.493(B-Y)

V=(R-Y)/1.14=0. 877(R-Y)

The YUV color space is very similar to the YIQ color space and both were proposed to be used with the NTSC standard, but because the YIQ color space needs a lower bandwidth that YUV, the YIQ color space was chosen.