white-point - meaning and definition. What is white-point
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What (who) is white-point - definition

STANDARD ILLUMINANT DEFINED BY THE INTERNATIONAL COMMISSION ON ILLUMINATION
CIE Standard Illuminant D65; D65 white point
  • Relative spectral power distribution of illuminant D and a black body of the same correlated color temperature, normalized about 560nm.
  • Spectral power distribution of D65.

white point         
  • Diagram of the [[CIE 1931 color space]] that shows the [[Rec. 2020]] (UHDTV) [[color space]] in the outer triangle and [[Rec. 709]] (HDTV) color space in the inner triangle. Both Rec. 2020 and Rec. 709 use [[Illuminant D65]] for the white point.
WIKIMEDIA DISAMBIGUATION PAGE
White Point
<graphics> A set of three colour coordinates that define the colour white in image processing applications. (2008-03-10)
White point         
  • Diagram of the [[CIE 1931 color space]] that shows the [[Rec. 2020]] (UHDTV) [[color space]] in the outer triangle and [[Rec. 709]] (HDTV) color space in the inner triangle. Both Rec.&nbsp;2020 and Rec.&nbsp;709 use [[Illuminant D65]] for the white point.
WIKIMEDIA DISAMBIGUATION PAGE
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. Depending on the application, different definitions of white are needed to give acceptable results.
white pointer         
  • A beachcomber looking at bite marks from a great white shark on a beached [[whale]] carcass
  • A beached baby white shark
  • Shark in [[Guadalupe Island Biosphere Reserve]], [[Mexico]]
  • Comparison of the size of an average orca and an average great white shark
  • Illustrated evolution from ''C. hastalis'' to ''C. carcharias''
  • alt=Photo of shark
  • alt=Photo of shark swimming at water surface
  • alt=Photo of inverted shark at surface
  • alt=Photo of large shark on shore surrounded by people
  • Great white shark breaching near [[Gansbaai]] in [[South Africa]]
  • 50 px
  • 50 px
  • alt=Photo of open-mouthed shark at surface.
  • The name 'great white shark' likely comes from the shark's size, as well as the white underside exposed on beached sharks.
  • ft}} in length.<ref name="LGWS"/>
  • Shark biting into the fish head teaser bait next to a cage in [[False Bay]], South Africa
  • A shark scavenging on a whale carcass in [[False Bay]], South Africa
  • 50 px
SPECIES OF LARGE LAMNIFORM SHARK
Carcharodon carcharias; White Pointer; White Shark; White shark; Great White shark (Carcharodon carcharias); Great White Shark; Great white sharks; Great White shark; White pointer shark; Pointer shark; The great white shark; White pointer; White sharks; Great white Shark; Great-White Shark; Big White Shark; Squalus carcharias; Carharodon carcharias; Squalus caninus; Carcharias lamia; Carcharias verus; Squalus vulgaris; Carcharias vulgaris; Carcharodon smithii; Carcharodon smithi; Carcharodon rondeletii; Carcharodon capensis; Carcharias atwoodi; Carcharias maso; Carcharodon albimors; Predatory behavior of great white sharks; Big white shark
¦ noun another term for great white shark.

Wikipedia

Illuminant D65

CIE standard illuminant D65 (sometimes written D65) is a commonly used standard illuminant defined by the International Commission on Illumination (CIE). It is part of the D series of illuminants that try to portray standard illumination conditions at open-air in different parts of the world.

D65 corresponds roughly to the average midday light in Western Europe / Northern Europe (comprising both direct sunlight and the light diffused by a clear sky), hence it is also called a daylight illuminant. As any standard illuminant is represented as a table of averaged spectrophotometric data, any light source which statistically has the same relative spectral power distribution (SPD) can be considered a D65 light source. There are no actual D65 light sources, only simulators. The quality of a simulator can be assessed with the CIE metamerism index.

The CIE positions D65 as the standard daylight illuminant:

[D65] is intended to represent average daylight and has a correlated colour temperature of approximately 6500 K. CIE standard illuminant D65 should be used in all colorimetric calculations requiring representative daylight, unless there are specific reasons for using a different illuminant. Variations in the relative spectral power distribution of daylight are known to occur, particularly in the ultraviolet spectral region, as a function of season, time of day, and geographic location.

Examples of use of white-point
1. And yet, the last time he viewed reality from a black–and–white point of view, he proved to be right.
2. Cass, who lives in New Orleans and with Chestnut‘s help recently finished a murder–mystery set in a small fictional Alabama town in 1'64, said their friendship taught her there is "a white point of view and a black point of view." "People would always tell Chess ‘Oh, you bring up race too much.