the sensitivity curves of the three types of cone G 100 99 400435.8 500 546.1 600 700 Wavelength
2 the sensitivity curves of the three types of cone
等能白:SE Red Green B⊥ue Mixture cd/m21.00004.5907 0.069156508 1 Red unit=[R=1.0000 cd/m2; 1 Green unit=[G]=4.5907 cd/m2; I Blue unit=B=0.0691 cd/m y p 100 [BI produce 100 100G produce 0 10075 100[R produce 0100
2 • 等能白：SE Red Green Blue Mixture cd/m2 1.0000 4.5907 0.0691 5.6508 1 Red unit = [R] = 1.0000 cd/m2 ; 1 Green unit = [G] = 4.5907 cd/m2 ; 1 Blue unit = [B] = 0.0691 cd/m2 . β γ ρ 100 [B] produce : 100 5 4 100 [G] produce : 0 100 75 100 [R] produce : 0 0 100
To match I power unit of 500nm B y p I unit of 500 nm produces 204020 20B 2010.8 39G 039292 20B]+39G]= 204030 I unit of 500 nm produces 204020 10 ofr produces 0 010 1[500nm]+10R]= 204030 1 [500 nm|+10 [R] is matched by 39[G|+ 20 BI 1[500nm 10R]+39G+20[B 1|600nm =95R]+30|G+0B 1|500nm]+1600nm]=85]+69G+208
2 To match 1 power unit of 500 nm β γ ρ 1 unit of 500 nm produces 20 40 20 20 [B] 20 1 0.8 39 [G] 0 39 29.2 20 [B] + 39 [G] = 20 40 30 1 unit of 500 nm produces 20 40 20 10 of R produces 0 0 10 1 [ 500 nm ] +10 [R] = 20 40 30 1 [ 500 nm ] +10 [R] is matched by 39 [G] + 20 [B] 1 [500 nm] = -10 [R] + 39 [G] + 20 [B] 1 [600 nm] = 95 [R] + 30 [G] + 0 [B] 1 [500 nm] + 1 [600 nm] = 85 [R] + 69 [G] + 20 [B]
222颜色方程 在颜色科学中,我们不直接用三刺激值R G、B来表示颜色,而用三原色各自占R+G+B总 量的相对比值表示颜色。 色度坐标:三原色各自占R+G+B总量的相对比 值 对颜色C*而言,其色度坐标为 r=R/(R+G+B) g =G/(R+G+B) b=B/(R+G+B) 颜色C的单位值:C=rR]+glG]+bIB 则颜色C的色量C:C=R+G+B
2 2.2.2 颜色方程 在颜色科学中，我们不直接用三刺激值R、 G、B来表示颜色，而用三原色各自占R+G+B总 量的相对比值表示颜色。 色度坐标：三原色各自占R+G+B总量的相对比 值。 对颜色C*而言，其色度坐标为： r = R / (R+G+B) g = G / (R+G+B) b = B / (R+G+B) 颜色C*的单位值：[C] = r [R] + g [G] + b [B] 则颜色C*的色量C： C = R + G + B
白色的单位向量[W] 令w]=(1/3)R+(1/3G+(1/3)B Iw]色度坐标:r=1/3、g=1/3、b=1/3 相应R、|G、[B的相对光亮度值: Lp=1.0000 4.5907、L R G B 0.0691 从而颜色C的单位光亮度为 LIC=rlR+g Lig+b LiBi 若已知颜色C*的光亮度为L,并且测量得颜 色C的r、g、b值,则颜色C*的色量为 C=L/LICi=L/(r LI +g LG+ b LIBI
2 白色的单位向量 [W] 令 [W] = (1/3)[R] + (1/3)[G] + (1/3)[B] [W]色度坐标：r = 1/3、g = 1/3、b = 1/3 相应 [R]、[G]、[B] 的相对光亮度值： L[R] = 1.0000 、L[G] = 4.5907 、L[B] = 0.0691 ， 从而颜色C*的单位光亮度为 L[C] = r L[R] + g L[G] + b L[B] 若已知颜色C*的光亮度为L，并且测量得颜 色C*的r、g、b值，则颜色C*的色量为 C = L / L[C] = L / ( r L[R] + g L[G] + b L[B] )