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Color Measurements: RGB Value Tristimulus Value Chromaticity Coordinate CCT

The document discusses different methods of measuring color including RGB value, tristimulus value, and chromaticity coordinate. RGB value measures the intensity of red, green, and blue light on a scale from 0-255. Tristimulus value measures the stimulation of three types of cone cells (short, middle, long) and uses three values (X,Y,Z) where Y represents luminance. Chromaticity coordinate likely refers to the two dimensional representation of colors in the chromaticity diagram.

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Asanka Rodrigo
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60 views3 pages

Color Measurements: RGB Value Tristimulus Value Chromaticity Coordinate CCT

The document discusses different methods of measuring color including RGB value, tristimulus value, and chromaticity coordinate. RGB value measures the intensity of red, green, and blue light on a scale from 0-255. Tristimulus value measures the stimulation of three types of cone cells (short, middle, long) and uses three values (X,Y,Z) where Y represents luminance. Chromaticity coordinate likely refers to the two dimensional representation of colors in the chromaticity diagram.

Uploaded by

Asanka Rodrigo
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Color Measurements

RGB Value

Tristimulus Value

Chromaticity Coordinate

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CCT
RGB Value (R,G,B)

• Red, Green and Blue


Intensity of a color on a
scale of 0 – 255
• Obtained from RGB Color
Space
• Not all visible lights are
defined
RGB Color Space
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Tristimulus Value
(X,Y,Z)
• Three kinds of Cone Cells that can sense light:
- Short
- Middle
- Long
• Three cone cells generate 3 stimulus to describe any color
sensation
• 3 stimulus values Tristimulus Values (Analogous, Not equal)
• In well-lit environments, humans are more sensitive to green light
than red or blue color of same power.
• Therefore,
Y=Luminance
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