Day 4_Part_3

# Day 4_Part_3 - coefficients x y z define a 3D color space...

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11 Tristimulus Theory (cont) many target color lights cannot be matched what if we add red light to the target light? C + rR = gG + bB • this works! mathematically same as adding a negative amount of red light C = -rR + gG + bB picture of color-matching functions r, g, b in Hill Figure 12.6

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12 CIE Color Matching Functions Commission Internationale de L’Eclairage (CIE) defined the standard observer (1931) invented three primary color lights (X, Y, and Z) that when added in positive amounts can match any perceivable color light C = xX + yY + zZ Hill Figure 12.8
13 CIE Chromaticity Diagram

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Unformatted text preview: coefficients x, y, z define a 3D color space ■ a 2D slice of this space yields the CIE chromaticity diagram (Hill Figure 12.10) viz.cac.psu.edu/sem_notes/color_2d/html/working_with_color.html 14 RGB Color Space ■ most common color space in graphics is red-green-blue (RGB) color space ◆ reason: easy to display on color monitors (which use red, green, and blue phosphors) ■ C = rR + gG + bB where 0 ≤ r ≤ 1, 0 ≤ g ≤ 1, 0 ≤ b ≤ 1 ■ additive color space C cyan Y yellow M magenta W white 15 RGB Color Space (cont) ■ in 3D r, g, b form a color cube...
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## This note was uploaded on 02/13/2012 for the course CSE 4431 taught by Professor Burton during the Winter '12 term at York University.

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Day 4_Part_3 - coefficients x y z define a 3D color space...

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