An image with the hues cyclically shifted

The hues in the image of this Painted Bunting are cyclically rotated with time.

Hue is one of the three main attributes of perceived color, in addition to lightness and saturation (also known as chroma, purity, intensity, or colorfulness). Hue is that aspect of a color described with names such as "red," "yellow," etc. Image File history File linksMetadata Download high resolution version (800x899, 130 KB) Summary Hue shift tool in photoshop allows the hue of an image to be altered. ... Image File history File linksMetadata Download high resolution version (800x899, 130 KB) Summary Hue shift tool in photoshop allows the hue of an image to be altered. ... Image File history File links Hue. ... Image File history File links Hue. ... Binomial name Passerina ciris (Linnaeus, 1758) Painted Bunting The Painted Bunting (Passerina ciris) belongs to the Passerina genus of birds in the Cardinal family Cardinalidae. ... Color is an important part of the visual arts. ... Lightness is a property of a color, or a dimension of a color space, that correlates with how bright or luminous a color is. ... In color theory, saturation refers to the intensity of a specific hue. ... Red may be any of a number of similar colours at the lowest frequencies of light discernible by the human eye. ... Yellow is any color of light that stimulates both the red and green cone cells of the retina, but not the blue cone cells. ...

Usually, colors with the same hue are distingushed with adjectives referring to their lightness and/or saturation, such as with "light blue," "pastel blue," "vivid blue." Notable exceptions include brown, a dark orange, ^[1] and pink, a light desaturated red. Lightness is a property of a color, or a dimension of a color space, that correlates with how bright or luminous a color is. ... In color theory, saturation refers to the intensity of a specific hue. ... The color brown is a dark red or orange of very low intensity. ... Look up orange in Wiktionary, the free dictionary. ... This article or section does not cite its references or sources. ... Red may be any of a number of similar colours at the lowest frequencies of light discernible by the human eye. ...

In painting color theory, a hue refers to a pure color —one without added white (tint) or black (shade) pigment. A hue is an element of the color wheel. Painter redirects here. ... In the arts and of painting, graphic design, and photography, color theory is a body of practical guidance to color mixing and the visual impact of specific colour combinations. ... Since the NTSC color television standard is susceptible to color errors, there is a tint control on NTSC television sets, which allows the image hue to be corrected. ... Shade is the blocking of sunlight (in particular direct sunshine) by any object, and also the shadow created by that object. ... For animal and plant pigments, see Pigment, biology. ... In the arts of painting, and photography, color theory is a set of basic rules for mixing color to achieve a desired result. ...

[edit] Computing Hue

In opponent color spaces, such as CIELAB and CIELUV, hue may be computed together with saturation (or chroma) by converting a color's chromatic coordinates from rectangular coordinates into polar coordinates. Hue is the angular part of the polar coordinate representation, while chroma is the radial component. CIE L*a*b* (CIELAB) is the most complete color model used conventionally to describe all the colors visible to the human eye. ... Lab is the abbreviated name of two different color spaces. ... In music, chromatic indicates the inclusion of notes not in the prevailing scale and is also used for those notes themselves (Shir-Cliff et al 1965, p. ... See Cartesian coordinate system or Coordinates (elementary mathematics) for a more elementary introduction to this topic. ... Fig. ... This article describes some of the common coordinate systems that appear in elementary mathematics. ... This article describes some of the common coordinate systems that appear in elementary mathematics. ...

Specifically, in CIELAB: ^[2] CIE L*a*b* (CIELAB) is the most complete color model used conventionally to describe all the colors visible to the human eye. ...

while, analogously, in CIELUV: ^[2] Lab is the abbreviated name of two different color spaces. ...

In practice, a four-quadrant arctangent may be used if available to invert these formulae. In mathematics, the trigonometric functions are functions of an angle, important when studying triangles and modeling periodic phenomena. ...

[edit] Computing Hue from RGB

Preucil ^[3] describes a color hexagon, similar to a trilinear plot described by Evans, Hanson, and Brewer, ^[4] which may be used to compute hue. To place red at 0°, green at 120°, and blue at 240°, one may solve: The RGB color model utilizes the additive model in which red, green, and blue light are combined in various ways to create other colors. ... Red may be any of a number of similar colours at the lowest frequencies of light discernible by the human eye. ... Mossy, green fountain in Wattens, Austria. ... The term blue may refer any of a number of similar colours. ...

[edit] Computing Hue from RGB for HSB and HSL

The factual accuracy of this article is disputed. Please see the relevant discussion on the talk page.

In an RGB color space, hue can be thought of as an angle φ. To calculate φ, let R, G, B be the color coordinates in RGB space, defined on a scale from zero to one. Then, after obtaining the brightness μ and the saturation σ, the hue could be obtained from The RGB color model utilizes the additive model in which red, green, and blue light are combined in various ways to create other colors. ... HSB is: another name for HSV color space a beer made by George Gale and Co. ... The HSL color space, also called HLS or HSI, stands for Hue, Saturation, Lightness (also Luminance or Luminosity) / Intensity. ... Image File history File links Circle-question-red. ... An RGB color space is any additive color space based on the RGB color model. ... An angle is the figure formed by two rays sharing a common endpoint, called the vertex of the angle. ... Brightness is an attribute of visual perception in which a source appears to emit a given amount of light. ... It has been suggested that this article or section be merged with Chromaticity. ...

(Compare with standard score). Using this formula, φ = 0° [0^c] would corresponds to red, while φ = 120° [2π/3^c] would correspond to blue, and φ = 240° [4π/3^c] would correspond to green. Compares the various grading methods in a normal distribution. ... A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized °, is a measurement of plane angle, representing 1／360 of a full rotation. ... The radian is a unit of plane angle. ...

The RGB coordinates should be derivable from the μ, σ, φ coordinates as follows:

Hue is a coordinate (an angle of rotation) in HSL color space and HSV color space. The HSL color space, also called HLS or HSI, stands for Hue, Saturation, Lightness (also Luminance or Luminosity) / Intensity. ... This article or section does not cite its references or sources. ...

[edit] Specialized Hues

The hues exhibited by caramel colorings and beers are fairly limited in range. The Linner Hue Index is used to quantify the hue of such products. A piece of caramel confectionery. ... A selection of bottled beers A selection of cask beers Beer is the worlds oldest[1] and most popular[2] alcoholic beverage, selling more than 133 billion litres (35 billion gallons) per year. ... The Linner Hue Index, [1] , is used to describe the hues which a given caramel color may produce. ...

[edit] Hue as a Qualification in the Names of Artist's Colors

Manufacturers of pigments use the word hue e.g. 'Cadmium Yellow (hue)' to indicate that the original pigmentation ingredient, often toxic, has been replaced by safer (or cheaper) alternatives whilst retaining the hue of the original. Replacements are often used for Chromium, Cadmium and Alizarin. General Name, Symbol, Number chromium, Cr, 24 Chemical series transition metals Group, Period, Block 6, 4, d Appearance silvery metallic Atomic mass 51. ... General Name, Symbol, Number cadmium, Cd, 48 Chemical series transition metals Group, Period, Block 12, 5, d Appearance silvery gray metallic Atomic mass 112. ... Molecular structure of alizarin Alizarin, or 1,2-dihydroxyanthraquinone or mordant red, is the red dye originally derived from the root of the madder plant. ...

[edit] Hue vs Dominant Wavelength

Dominant (or equivalent) Wavelength is a physical analog to the perceptual attribute hue. On a chromaticity diagram, a line is drawn from a white point through the coordinates of the color in question, until it intersects the spectrum locus. The wavelength at which the line intersects the spectrum locus is identified as the color's dominant wavelength if the point is on the same side of the white point as the spectrum locus, and as the color's complementary wavelength if the point is on the opposite side. ^[5] Dominant/complementary wavelength example on the CIE color space The x marks the color in question. ... The International Commission on Illumination (usually known as the CIE for its French-language name Commission Internationale de lEclairage) is the international authority on light, illumination, colour, and colour spaces. ... A white point is one of a number of reference illuminants used in colorimetry which serve to define the color white. Depending on the application, different definitions of white are needed to give acceptable results. ... Dominant/complementary wavelength example on the CIE color space The x marks the color in question. ... A white point is one of a number of reference illuminants used in colorimetry which serve to define the color white. Depending on the application, different definitions of white are needed to give acceptable results. ... Dominant/complementary wavelength example on the CIE color space The x marks the color in question. ...

[edit] References

1. ^ C J Bartleson, "Brown." Color Research and Application, 1 : 4, p 181-191 (1976).
2. ^ ^{a b} Colorimetry, second edition: CIE Publication 15.2. Vienna: Bureau Central of the CIE, 1986.
3. ^ Frank Preucil, "Color Hue and Ink Transfer … Their Relation to Perfect Reproduction, TAGA Proceedings, p 102-110 (1953).
4. ^ Ralph Merrill Evans, W T Hanson, and W Lyle Brewer, Principles of Color Photography. New York: Wiley, 1953
5. ^ Deane B Judd and Günter Wyszecki, Color in Business, Science, and Industry. New York: Wiley, 1976.

[edit] See also

• Lightness
• Chroma
• Munsell color system
• Brightness
• Bezold-Brücke shift
• Saturation

Lightness is a philosophical concept most closely associated with continental philosophy and existentialism, which is used in ontology. ... Chroma may refer to: Chroma, short for Chromatics, the science of color. ... Munsell Color Wheel In colorimetry, the Munsell color system is a color system that specifies colors based on three color dimensions. ... Brightness is an attribute of visual perception in which a source appears to emit a given amount of light. ... The Bezold-Brücke shift is a change in hue perception as intensity changes. ... It has been suggested that this article or section be merged with Chromaticity. ...

[edit] External link

• Editing of hue in photography