lecture 16 color vision 2 Flashcards
CIE stands for…
A) color institute of equalization
B) international commission on illumination
C) coalition of illumination energy
D) energy commission of illumination
B) international commission on illumination
What are the 2 theories regarding color processing?
trichromatic theory and opponent process theory
Which theory describes the fact that 3 types of cones represent color vision?
trichromatic theory
which theory describes how red and green oppose each other and yellow and blue oppose each other
the opponent process theory
The CIE diagram is domintaed by which color and why?
green because L and M cones are most sensitive to green and overlap in the green
Within the CIE chart any one point is a different hue. Is there only one combination of colors that can make this unique hue?
no, there are many different color combinations that can make each unique hue
the bottom of the CIE diagram represents…
a) violet
b) spectral colors ranging from 380-700
c) non-spectral purples
d) all the green hues
c) non-spectral purples
On the CIE diagram “E” represents…
A) non-spectral purples
B) black
C) an achromatic white point
D) the mid point between non-complimentary colors
C) an achromatic white point (any line that passes thru E can form complimentary color pairs)
Why was the CIE diagram created?
To avoid the negative values inherent to the RGB system
When the CIE diagram was created, red, green, and blue got which new terms?
x, y, and z (they then became known as the imaginary primaries)
(T or F) even though the CIE primaries are called imaginary, they actually do really exist.
False, they do not exist, the negative values were converted to positive values to make the math make sense.
What is the formula for excitation purity?
a/a+b (a is the line closer to W)
x+y+z=?
x+y+z=1, if we know x and y we can find z
x=X/X+Y+Z
y=Y/X+Y+Z
z=Z/X+Y+Z
