ITU-R BT.601(用于标清电视)
' A- U1 j: k' U- i+ N7 A' bRGB → YCbCr
% U9 B, T7 H, m0 `Y = 0.29900 × R + 0.58700 × G + 0.11400 × B
1 f0 e; v m. {' g: h7 iCb = -0.16874 × R - 0.33126 × G + 0.50000 × B# Y) X) F2 {# Y
Cr = 0.50000 × R - 0.41869 × G - 0.081 × B9 m' s5 N' n& F3 Z- q; y# s1 Q
YCbCr → RGB
$ Y9 G/ O/ y% C7 C2 sR = Y + 1.40 200 × Cr
3 ?7 c: i- F% o* T; N9 ^G = Y - 0.34414 × Cb - 0.71414 × Cr" W5 t- A7 _7 U9 X5 Z
B = Y + 1.77200 × Cb) ~, p# P+ @; Y1 R' Z0 j0 ]
ITU-R BT.709(用于高清电视)
4 z1 j: w9 G0 F& m. b0 [RGB → YPbPr
, `" ?$ n% E" P* E4 a: N3 ?Y = 0.2126 × R + 0.7152 × G + 0.0722 × B& W* l5 x: i) X$ T1 _
Pb = -0.1146 × R - 0.3854 × G + 0.5000 × B
7 d6 q* q6 L2 [/ X4 uPr = 0.50000 × R - 0.4542 × G - 0.0458 × B
# y. i9 m1 Y; O, CYPbPr → RGB
6 n9 w5 g8 K$ v& m, gR = Y + 1.5748 × Pr$ U8 {* p& v( {& J6 w1 H+ ]8 r
G = Y - 0.1873 × Pb - 0.4681 × Pr- y7 V$ B1 Z8 T4 ~# j
B = Y + 1.8556 × Pb |