ITU-R BT.601(用于标清电视). u# s! h7 l! {" d h3 ?* `2 m
RGB → YCbCr7 n, C+ h. Z4 @8 d
Y = 0.29900 × R + 0.58700 × G + 0.11400 × B$ u. \, S9 N' i8 q
Cb = -0.16874 × R - 0.33126 × G + 0.50000 × B
) v# Q1 ?0 E5 z9 B7 lCr = 0.50000 × R - 0.41869 × G - 0.081 × B- U$ ~) n4 f- a- K% |5 B
YCbCr → RGB
6 _3 P% ]3 M8 q0 Y! I* {R = Y + 1.40 200 × Cr x% K* M0 R: U" `* z
G = Y - 0.34414 × Cb - 0.71414 × Cr
' F$ o) k" `) Q; Y3 C. AB = Y + 1.77200 × Cb- A X& {2 z S- y1 K/ I( d
ITU-R BT.709(用于高清电视)
. Y8 G' Z8 s9 Q" @5 }RGB → YPbPr
+ H7 I" f/ r1 j* n( E5 @Y = 0.2126 × R + 0.7152 × G + 0.0722 × B' S/ q: N) r1 S/ J
Pb = -0.1146 × R - 0.3854 × G + 0.5000 × B
( K( a2 L! `1 V6 u1 yPr = 0.50000 × R - 0.4542 × G - 0.0458 × B
: S7 R1 l, d" N% Q6 [7 `YPbPr → RGB
5 X1 @* l% x/ fR = Y + 1.5748 × Pr
2 ^$ M2 {/ Y u' S# c9 NG = Y - 0.1873 × Pb - 0.4681 × Pr
9 A, R; h) _2 @) f+ fB = Y + 1.8556 × Pb |