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notes - Tristimulus Values Chromaticity Diagram 8:26:00 AM...

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Tristimulus Values, Chromaticity Diagram 21/01/2008 08:26:00 Describe color What describes the color of an object? Munsell Hue Value/Chroma CIELab – L*a*b* Tristimulus Values X,Y,Z Amount of three primary colors needed to match a sample To determine tristimulus values you need A light source An object An observer (standard observer) Spectral Power Distribution Describes power present at each wave length for a light source or illuminant Measured with a spectroradiometer Represented by S λ Not a single value, have a value at each wavelength Blackbody Radiators: Color Temperature CIE Illuminants (International Commission of Illumination) Objects Objects have a reflectance across the spectrum (R λ ) Measured with monochromatic light at each wavelength
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Have a reflectance at each wavelength
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