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| YUV | The YUV model defines a color space in terms of one luma and two
chrominance components. YUV is used in the PAL and NTSC systems of
television broadcasting, which are the standards in much of the world.
YUV models human perception of color more closely than the standard RGB
model used in computer graphics hardware, but not as closely as the HSL
color space and HSV color space. Y stands for the luma component (the
brightness) and U and V are the chrominance (color) components. YUV
signals are created from an original RGB (red, green and blue) source.
The weighted values of R, G and B are added together to produce a single
Y signal, representing the overall brightness, or luma, of that spot.
The U signal is then created by subtracting the Y from the blue signal
of the original RGB, and then scaling; and V by subtracting the Y from
the red, and then scaling by a different factor. the accuracy of the
brightness information of the luma channel has far more impact on the
image discerned than that of the other two. |
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