Colorimetry

Questions

Answer the following questions:

Question

Consider 2 stimulus and defined by their trichromatic coordinates and as well as by their luminance and . Donner l'expression vectorielle du stimulus obtained through additive mixing of the 2 stimulus and .

Question

For a stimulus with trichromatic coordinates and luminance , we define as Show that can also be written

Solution

Question

We choose as the stimulus the reference illuminant D65. From table 1, give the trichromatic coordinates of this stimulus.


   
    Table 1 : Trichromatic coordinates of normalized illuminants.
Table 1 : Trichromatic coordinates of normalized illuminants. [zoom...]Info
Solution

Question

Which polychromatic source is close to the stimulus ?

Solution

Question

The stimulus is monochromatic at 585nm. From the portion of the CIE 1964 table displayed below, give the trichromatic coordinates of this stimulus.


   
    Tableau 2 : Tristimulus values.
Tableau 2 : Tristimulus values. [zoom...]Info
Solution

Question

Show that the stimulus has the following coordinates :

Solution

Question

Calculate the numerical values of , and for and .

Solution

Question

From table 1, which illuminant is closer to the stimulus ?

Solution

Question

Calculate the purity of the color .

Solution
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