YUV Color Conversion - Imaging toolkit feature
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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.