色度学原理与标准色度学系统(ppt)
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Though colors strange at times appear, the moral of this tale is clear:
to understand just what we see, object, light, and eye, all three,
must color all our thinking through of chromic problems, old or new!
亮度相等。Lp、Lq、Lr即为单位颜色[P]、[Q]、 [R]的光亮度比值。
选 择 光 亮 度 单 位 ， 则 Lp 、 Lq 、 Lr 为 [P] 、 [Q]、[R]各单位颜色的光亮度值。
因此，Lp、Lq、Lr是单位颜色[P]、[Q]、[R] 的光亮度系数。
2.1.2 同颜色光亮度的相加
p [P]、q [Q]两色混合，与 r [R]光亮度比较
颜色匹配方程：C[C] + B[B]= R[R] + G[G] 可写成：C[C] = R[R] + G[G] - B[B] (2-3)
颜色转盘
the sensitivity curves of the three types of cone
• 等能白：SE Red
cd/m2 1.0000
Green 4.5907
C[C]= R[R] + G[G] + B[B]
(2-2)
此时称 R、G、B 为颜色C*的三刺激值。
色光匹配： Red
nm 700
Green 546.1
Blue 435.8
2.2.2 颜色方程
在颜色转盘实验中，如果被匹配的颜色(转盘 中心)很饱和，那么用红、绿、蓝三原色可能实 现不了匹配。在这种情况下，如图2-1 (b)所示匹 配。
（r，g。b）
r
b
g
B*
R*
2.2.2 颜色方程
三原色R*、G*、B* 、任意色C*看成是色向量， 相应的单位向量[R]、[G]、[B]以及[C]。 R*= R[R]、 G*= G[G]、 B*= B[B]、C* =C[C]
当颜色C* 与R[R]、 G[G]、 B[B] 混合视觉上 匹配时，则可写出颜色方程：
2（优选）色度学原理与标准色度学系 统
You foolish man, said Missis Chrome, you should have taken from the home
a simple of the color done; you can’t remember every one.
The man’s reply to their complaint was that the pigments in the paint
had been exchanged, since they had bought, for others of a different sort.
To solve the problem on their wall, he gave them paint to do it all
In triumph now she took it home, and gave it straight to Mister Chrome.
He put it on without delay, and found the color now okey.
But, after dark, in tungsten light, they found the color still not right.
Taking care that she had got a sample from the early pot,
she went and bought her husband more of better color from the store.
Before she paid, she checked the shade, and found a perfect match it made.
2.1 色度学实验依据
2.1.1 颜色匹配实验
颜 色 转 盘
颜色光的匹配实验
2.1.2 同颜色光亮度的相加
设有三个不同颜色的色光 ：P*、Q*、R* 相应色的单位量值：[P]、[Q]、[R]
p、q、r 分别为颜色P*、Q*、R*的强度。 调出[P]/ Lp、[Q] / Lq、[R] / Lr，使这些光
So to the store they both went now, with samples clear, and asked them how
a paint that matched in daylight bright could fail to match in tungsten light.
实验证明：
当 p、q、r 满足下列数值关系时，被比较 的两光亮度相等。
p Lp + q Lq = r Lr 物理意义：
（2-1）
不论颜色的成分如何，各种颜色重叠的光 亮度是可以相加的。
2.2 颜色的数学表示
2.2.1 色三角形 色度匹配：色光相同的颜色和亮度
色度：色光的颜色和亮度的统称
G*
色坐标 ：
They hung them up with great delight; they matched in tungsten and daylight.
A neighbor then did make a call and fixed his eye upon the wall;
the paint, he said was all one color, but clearly saw the curtains duller!
from just one batch of constant shade, and then at last success was made.
To compensate them for their trouble, the store sent to them curtains double.
Blue Mixture 0.0691 5.6508
1 Red unit = [R] = 1.0000 cd/m2 ;
to understand just what we see, object, light, and eye, all three,
must color all our thinking through of chromic problems, old or new!
亮度相等。Lp、Lq、Lr即为单位颜色[P]、[Q]、 [R]的光亮度比值。
选 择 光 亮 度 单 位 ， 则 Lp 、 Lq 、 Lr 为 [P] 、 [Q]、[R]各单位颜色的光亮度值。
因此，Lp、Lq、Lr是单位颜色[P]、[Q]、[R] 的光亮度系数。
2.1.2 同颜色光亮度的相加
p [P]、q [Q]两色混合，与 r [R]光亮度比较
颜色匹配方程：C[C] + B[B]= R[R] + G[G] 可写成：C[C] = R[R] + G[G] - B[B] (2-3)
颜色转盘
the sensitivity curves of the three types of cone
• 等能白：SE Red
cd/m2 1.0000
Green 4.5907
C[C]= R[R] + G[G] + B[B]
(2-2)
此时称 R、G、B 为颜色C*的三刺激值。
色光匹配： Red
nm 700
Green 546.1
Blue 435.8
2.2.2 颜色方程
在颜色转盘实验中，如果被匹配的颜色(转盘 中心)很饱和，那么用红、绿、蓝三原色可能实 现不了匹配。在这种情况下，如图2-1 (b)所示匹 配。
（r，g。b）
r
b
g
B*
R*
2.2.2 颜色方程
三原色R*、G*、B* 、任意色C*看成是色向量， 相应的单位向量[R]、[G]、[B]以及[C]。 R*= R[R]、 G*= G[G]、 B*= B[B]、C* =C[C]
当颜色C* 与R[R]、 G[G]、 B[B] 混合视觉上 匹配时，则可写出颜色方程：
2（优选）色度学原理与标准色度学系 统
You foolish man, said Missis Chrome, you should have taken from the home
a simple of the color done; you can’t remember every one.
The man’s reply to their complaint was that the pigments in the paint
had been exchanged, since they had bought, for others of a different sort.
To solve the problem on their wall, he gave them paint to do it all
In triumph now she took it home, and gave it straight to Mister Chrome.
He put it on without delay, and found the color now okey.
But, after dark, in tungsten light, they found the color still not right.
Taking care that she had got a sample from the early pot,
she went and bought her husband more of better color from the store.
Before she paid, she checked the shade, and found a perfect match it made.
2.1 色度学实验依据
2.1.1 颜色匹配实验
颜 色 转 盘
颜色光的匹配实验
2.1.2 同颜色光亮度的相加
设有三个不同颜色的色光 ：P*、Q*、R* 相应色的单位量值：[P]、[Q]、[R]
p、q、r 分别为颜色P*、Q*、R*的强度。 调出[P]/ Lp、[Q] / Lq、[R] / Lr，使这些光
So to the store they both went now, with samples clear, and asked them how
a paint that matched in daylight bright could fail to match in tungsten light.
实验证明：
当 p、q、r 满足下列数值关系时，被比较 的两光亮度相等。
p Lp + q Lq = r Lr 物理意义：
（2-1）
不论颜色的成分如何，各种颜色重叠的光 亮度是可以相加的。
2.2 颜色的数学表示
2.2.1 色三角形 色度匹配：色光相同的颜色和亮度
色度：色光的颜色和亮度的统称
G*
色坐标 ：
They hung them up with great delight; they matched in tungsten and daylight.
A neighbor then did make a call and fixed his eye upon the wall;
the paint, he said was all one color, but clearly saw the curtains duller!
from just one batch of constant shade, and then at last success was made.
To compensate them for their trouble, the store sent to them curtains double.
Blue Mixture 0.0691 5.6508
1 Red unit = [R] = 1.0000 cd/m2 ;