ITU-R BT.601(用于标清电视)
. M2 ~% X, p! n# O+ VRGB → YCbCr. ?* n% `0 k% T H& \# Y5 f9 W3 c
Y = 0.29900 × R + 0.58700 × G + 0.11400 × B2 n8 m3 r' g$ ?/ ~3 K+ q2 V
Cb = -0.16874 × R - 0.33126 × G + 0.50000 × B
0 Q0 g2 U- N& a; @5 {( KCr = 0.50000 × R - 0.41869 × G - 0.081 × B! a2 T4 B( M1 c7 D9 H
YCbCr → RGB- S+ \( L5 l6 d9 [
R = Y + 1.40 200 × Cr2 ~" n/ d4 h! L
G = Y - 0.34414 × Cb - 0.71414 × Cr+ P( V4 C# Q, t9 b d) H' B
B = Y + 1.77200 × Cb
% X5 R V- `+ h$ t" ]ITU-R BT.709(用于高清电视)
C4 w( S( e9 {/ v( ?RGB → YPbPr
9 [% o% j0 y, U* MY = 0.2126 × R + 0.7152 × G + 0.0722 × B3 V3 L, D# O, t9 x1 d8 b5 x( \% m
Pb = -0.1146 × R - 0.3854 × G + 0.5000 × B
6 K/ T; o! S c. N s3 XPr = 0.50000 × R - 0.4542 × G - 0.0458 × B, h7 ]* _6 p8 @9 ?8 [3 c3 x$ z8 L
YPbPr → RGB" q* i) W* ?( Z# @! T0 o
R = Y + 1.5748 × Pr
$ R7 b+ l' v: R, o3 i) }G = Y - 0.1873 × Pb - 0.4681 × Pr: p. _+ B/ K& Z W) P# c/ K
B = Y + 1.8556 × Pb |