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13.2.4.7 YIQ Conversion

The YIQ color space is used in U.S. color television broadcasting. Conversion from RGBA to YIQA may be accomplished using the color matrix:

\begin{displaymath}\left[
\begin{array}{c}
Y \\
I \\
Q \\
A
\end{array}\right...
...left[
\begin{array}{c}
R \\
G \\
B \\
A
\end{array}\right]
\end{displaymath}

(Generally, YIQ is not used with an alpha channel so the fourth component is eliminated.) The inverse matrix is used to map YIQ to RGBA [27].



David Blythe
1999-08-06