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Spectral power distribution

Index Spectral power distribution

In radiometry, photometry and color science, a spectral power distribution (SPD) measurement describes the power per unit area per unit wavelength of an illumination (radiant exitance). [1]

31 relations: Adams chromatic valence color space, CIE 1931 color space, CIELAB color space, Color appearance model, Color rendering capacity, Color rendering index, Color temperature, Colorimetry, Farnsworth-Munsell 100 hue test, Fritz Goos, Grassmann's laws (color science), HCL color space, Headlamp, HSL and HSV, Illuminant D65, Impossible color, Infrared open-path detector, Metamerism (color), Murasaki (novel), Planckian locus, Primary color, SPD (disambiguation), Spectral density, Spectroradiometer, Spectroscopy, Spectrum, Standard illuminant, Stray light, White, White point, Wratten number.

Adams chromatic valence color space

Adams chromatic valence color spaces are a class of color spaces suggested by Elliot Quincy Adams.

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CIE 1931 color space

The CIE 1931 color spaces were the first defined quantitative links between distributions of wavelengths in the electromagnetic visible spectrum, and physiologically perceived colors in human color vision.

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CIELAB color space

The CIELAB color space (also known as CIE L*a*b* or sometimes abbreviated as simply "Lab" color space) is a color space defined by the International Commission on Illumination (CIE) in 1976.

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Color appearance model

A color appearance model (abbreviated CAM) is a mathematical model that seeks to describe the perceptual aspects of human color vision, i.e. viewing conditions under which the appearance of a color does not tally with the corresponding physical measurement of the stimulus source.

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Color rendering capacity

Color rendering capacity is a measure of how well colors are represented under artificial light.

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Color rendering index

A color rendering index (CRI) is a quantitative measure of the ability of a light source to reveal the colors of various objects faithfully in comparison with an ideal or natural light source.

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Color temperature

The color temperature of a light source is the temperature of an ideal black-body radiator that radiates light of a color comparable to that of the light source.

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Colorimetry

Colorimetry is "the science and technology used to quantify and describe physically the human color perception." It is similar to spectrophotometry, but is distinguished by its interest in reducing spectra to the physical correlates of color perception, most often the CIE 1931 XYZ color space tristimulus values and related quantities.

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Farnsworth-Munsell 100 hue test

The Farnsworth-Munsell 100 Hue Color Vision Test, or Munsell Vision Test, is a test of the human visual system often used to test for color blindness.

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Fritz Goos

Hermann Fritz Gustav Goos (11 January 1883 – 18 May 1968) was a German physicist and astronomer.

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Grassmann's laws (color science)

Grassmann's laws describe empirical results about how the perception of mixtures of colored lights (i.e., lights that co-stimulate the same area on the retina) composed of different spectral power distributions can be algebraically related to one another in a color matching context.

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HCL color space

HCL (Hue-Chroma-Luminance) is a color space model designed to accord with human perception of color.

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Headlamp

A headlamp is a lamp attached to the front of a vehicle to light the road ahead.

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HSL and HSV

HSL (hue, saturation, lightness) and HSV (hue, saturation, value) are two alternative representations of the RGB color model, designed in the 1970s by computer graphics researchers to more closely align with the way human vision perceives color-making attributes.

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Illuminant D65

CIE Standard Illuminant D65 (sometimes written D65) is a commonly used standard illuminant defined by the International Commission on Illumination (CIE).

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Impossible color

Impossible colors or forbidden colors are supposed colors that cannot be perceived in normal seeing of light that is a combination of various intensities of the various frequencies of visible light, but are reported to be seen in special circumstances.

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Infrared open-path detector

Infrared open-path gas detectors send out a beam of infrared light, detecting gas anywhere along the path of the beam.

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Metamerism (color)

In colorimetry, metamerism is a perceived matching of the colors with different (nonmatching) spectral power distributions.

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Murasaki (novel)

Murasaki is a 1992 "shared universe" hard science fiction novel in six parts to which Poul Anderson, Greg Bear, Gregory Benford, David Brin, Nancy Kress and Frederik Pohl each contributed one chapter; it was edited by Robert Silverberg.

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Planckian locus

In physics and color science, the Planckian locus or black body locus is the path or ''locus'' that the color of an incandescent black body would take in a particular chromaticity space as the blackbody temperature changes.

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Primary color

A set of primary colors is, most tangibly, a set of real colorants or colored lights that can be combined in varying amounts to produce a gamut of colors.

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SPD (disambiguation)

SPD often stands for the Social Democratic Party of Germany, one of the two biggest political parties in Germany.

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Spectral density

The power spectrum S_(f) of a time series x(t) describes the distribution of power into frequency components composing that signal.

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Spectroradiometer

Spectroradiometers are devices designed to measure the spectral power distribution of a source.

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Spectroscopy

Spectroscopy is the study of the interaction between matter and electromagnetic radiation.

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Spectrum

A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without steps, across a continuum.

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Standard illuminant

A standard illuminant is a theoretical source of visible light with a profile (its spectral power distribution) which is published.

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Stray light

Stray light is light in an optical system, which was not intended in the design.

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White

White is the lightest color and is achromatic (having no hue), because it fully reflects and scatters all the visible wavelengths of light.

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White point

A white point (often referred to as reference white or target white in technical documents) is a set of tristimulus values or chromaticity coordinates that serve to define the color "white" in image capture, encoding, or reproduction.

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Wratten number

Wratten numbers are a labeling system for optical filters, usually for photographic use comprising a number sometimes followed by a letter.

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Spectral power distributions.

References

[1] https://en.wikipedia.org/wiki/Spectral_power_distribution

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