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An illuminant is characterized by its relative spectral power distribution (SPD). The white point of an illuminant is the chromaticity of a white object under the illuminant, and can be specified by chromaticity coordinates, such as the x, y coordinates on the CIE 1931 chromaticity diagram (hence the use of the relative SPD and not the absolute SPD, because the white point is only related to ...
The spectrum of a standard illuminant, like any other profile of light, can be converted into tristimulus values. The set of three tristimulus coordinates of an illuminant is called a white point. If the profile is normalized, then the white point can equivalently be expressed as a pair of chromaticity coordinates.
The color swatches represent the color of each white point, ... light white fluorescent F7 0.31292: 0.32933 0.31569: 0.32960 6500 D65 simulator, daylight simulator F8
The next step is to determine the values of the test color samples under each illuminant in the CIEUVW color space. This is done by integrating the product of the CMF with the SPDs of the illuminant and the sample, then converting from CIEXYZ to CIEUVW (with the u, v coordinates of the reference illuminant as white point):
The white balance has been adjusted towards the warm side for creative effect. Photograph of a ColorChecker as a reference shot for color balance adjustments. Two photos of a high-rise building shot within a minute of each other with an entry-level point-and-shoot camera.
For example, the white point of an sRGB display is an x, y chromaticity of (0.3127, 0.3290), where x and y coordinates are used in the xyY space. (u′, v′), the chromaticity in CIELUV, is a fairly perceptually uniform presentation of the chromaticity as (another than in CIE 1931) planar Euclidean shape.
Filmmaker Kavich Neang's semiautobiographical, fully poetic act of mourning about a fast-changing Cambodia chronicles a decaying low-income housing complex.
In contrast, a color appearance model takes the white point of the illuminant into account (which is why a color appearance model requires this value for its calculations); if the white point of the illuminant changes, the color of the surface as reported by the color appearance model remains the same.