???????????RGB??????????????????C(???)Y(??)M(????)????????????????????????????????3??????????(??????)????????

1
???
???????????RGB??????????????????C(???)Y(??)M(????)
????????????????????????????????3??????????(??????
)???????? ?????????????RGB????????????????????????
?????RGB???????????????????RGB???????????????YUV??
??????????Y(??)?U,V(?????)???????????????????YUV??
???????????NTSC????????Y,R-Y,B-Y????????????Y,Cr,C
b????????????? Y,R-Y,B-Y? Y 0.3R
0.59G 0.11B R-Y 0.7R -0.59G
-0.11B B-Y -0.3R -0.59G
0.89B Y,Cr,Cb? Y 0.299R 0.587G
0.114B cr 0.5R -0.419G
-0.081B cb-0.169R -0.331G
0.500B ???????? RGB?????????RGB????????????????
?
?????????R???????????????? ???????????????????????
??????? ??????????????????????????????????????????
?R???????????????(????????)?????????????????RGB???
??????3???XYZ???XYZ???????????????????????????????
??????Y????????????????????XYZ??????????XYZ???????
?? ??XYZ?????????????????????xy????Lab???(Lab
?????????)(?????????????)??????
2
Xy????Lab???(Lab???) XYZ???????
xX/(XYZ) yY/(XYZ)
ZZ/(XYZ) ?????x?y?????????xy???(CIE???)???(??)
?????????????????????????????? XYZ????RGB????YUV
????????Lab?????? ???????XYZ?X0?Y0?Z0??????
L116(Y/Y0) 1/3-16 a500((X/X0)1/3-(Y/Y0)
1/3) b200((Y/Y0)1/3-(Z/Z0)1/3) ???????L
ab????CIE???????? L????a,b??????????????????? a,b?
????????????????????UV????????????????????????????
???????????????????????? ??????a,b?????????????UV
??????????????????????????????????????????????????
?????????????????????? Lab??????????????
CIE??????????????????(UV????????) ???????????
Photoshop???????????????? ?????????????? Lab????
??????????????????????????????????????????????????
?????????????????????????