 A comparison of different color spaces. A color model is an abstract mathematical model describing the way colors can be represented as tuples of numbers, typically as three or four values or color components (e.g. RGB and CMYK are color models). However, a color model with no associated mapping function to an absolute color space is a more or less arbitrary color system with little connection to the requirements of any given application. Image File history File links Size of this preview: 584 × 600 pixelsFull resolution (661 × 679 pixel, file size: 362 KB, MIME type: image/png) This is a map that compares how much of the color spectrum (that large oval in the far back) different color spaces cover. ...
Image File history File links Size of this preview: 584 × 600 pixelsFull resolution (661 × 679 pixel, file size: 362 KB, MIME type: image/png) This is a map that compares how much of the color spectrum (that large oval in the far back) different color spaces cover. ...
A color model is an abstract mathematical model describing the way colors can be represented as tuples of numbers, typically as three or four values or color components (e. ...
Color is an important part of the visual arts. ...
In mathematics, a tuple is a finite sequence (also known as an ordered list) of objects, each of a specified type. ...
A representation of additive color mixing—In CRT based (analog electronics) television three color electron guns are used to stimulate such an arrangement of phosphorescent coatings of the glass, the resultant reemission of photons providing the image seen by the eye. ...
It has been suggested that process color be merged into this article or section. ...
An absolute color space is a color space in which colors are unambiguous, where they do not depend on any external factors. ...
Adding a certain mapping function between the color model and a certain reference color space results in a definite "footprint" within the reference color space. This "footprint" is known as a gamut, and, in combination with the color model, defines a new color space. For example, Adobe RGB and sRGB are two different absolute color spaces, both based on the RGB model. In computer graphics, the gamut, or color gamut (pronounced ), is a certain complete subset of colors. ...
The Adobe RGB color space is an RGB color space developed by Adobe Systems in 1998. ...
CIE 1931 xy chromaticity diagram showing the gamut of the sRGB color space and location of the primaries. ...
An absolute color space is a color space in which colors are unambiguous, where they do not depend on any external factors. ...
In the most generic sense of the definition above, color spaces can be defined without the use of a color model. These spaces, such as Pantone, are in effect a given set of names or numbers which are defined by the existence of a corresponding set of physical color swatches. This article focuses on the mathematical model concept. For the record label, see Pantone Music. ...
Understanding the concept
 A comparison of RGB and CMYK color models. Most people have heard that a wide range of colors can be created by the primary colors red, blue, and yellow, if working with paints. Those colors then define a color space. We can specify the amount of red color as the X axis, the amount of blue as the Y axis, and the amount of yellow as the Z axis, giving us a three-dimensional space, wherein every possible color has a unique position. Image File history File links RGB_CMYK_4. ...
Image File history File links RGB_CMYK_4. ...
Primary Colors, a 1996 novel by Anonymous (later revealed by Donald Foster to be journalist Joe Klein), is a roman à clef about U.S. President Bill Clintons first presidential campaign in 1992. ...
A coordinate axis is one of a set of vectors that defines a coordinate system. ...
However, this is not the only color space. For instance, when colors are displayed on a computer monitor, they are usually defined in the RGB (red, green and blue) color space. This is another way of making the same colors, and red, green and blue can be considered as the X, Y and Z axes. Another way of making the same colors is to use their hue (X axis), their saturation (Y axis) and their brightness (Z axis). This is called the HSV color space. Many color spaces can be represented as three-dimensional (X,Y,Z) values in this manner, but some have more, or fewer dimensions, and some cannot be represented in this way at all. An image with the hues cyclically shifted The hues in the image of this Painted Bunting are cyclically rotated with time. ...
It has been suggested that this article or section be merged with Chromaticity. ...
Brightness is an attribute of visual perception in which a source appears to emit a given amount of light. ...
This article or section does not cite its references or sources. ...
Notes When formally defining a color space, the usual reference standard is the CIELAB or CIEXYZ color spaces, which were specifically designed to encompass all colors the average human can see. This is the most accurate color space but is too complex for everyday uses. Without further qualification, Lab color space refers to that of Hunter (Richard S Hunter, JOSA, 38, p 661 (1948)), which is an Adams Chromatic Valance Space. ...
In the study of the perception of color, one of the first mathematically defined color spaces was the CIE XYZ color space (also known as CIE 1931 color space), created by the International Commission on Illumination (CIE) in 1931. ...
Since "color space" is a more specific term for a certain combination of a color model plus a color mapping function, the term "color space" tends to be used to also identify color models, since identifying a color space automatically identifies the associated color model. Informally, the two terms are often used interchangeably, though this is strictly incorrect. For example, although several specific color spaces are based on the RGB model, there is no such thing as the RGB color space.
Since any color space defines colors as a function of the absolute reference frame, color spaces, along with device profiling, allow reproducible representations of color, in both analogue and digital representations. An analog or analogue signal is an allergy continuous in both time and amplitude. ...
A digital system is one that uses discrete values (often electrical voltages), especially those representable as binary numbers, or non-numeric symbols such as letters or icons, for input, processing, transmission, storage, or display, rather than a continuous spectrum of values (ie, as in an analog system). ...
Color space density The RGB color model is implemented in different ways, depending on the capabilities of the system used. By far the most common general-use incarnation as of 2006 is the 24-bit implementation, with 8 bits, or 256 discrete levels of color per channel. Any color space based on such a 24-bit RGB model is thus limited to a gamut of 256×256×256 ≈ 16.7 million colors. Some implementations use 16 bits per component, resulting in the same range with a greater density of distinct colors. This is especially important when working with wide-gamut color spaces (where most of the more common colors are located relatively close together), or when a large number of digital filtering algorithms are used consecutively. The same principle applies for any color spaces based on the same color model, but implemented in different bit depths. 2006 is a common year starting on Sunday of the Gregorian calendar. ...
This article is about the unit of information. ...
This article is actively undergoing a major edit. ...
Partial list of color spaces CIE 1931 XYZ color space was one of the first attempts to produce a color space based on measurements of human color perception (earlier efforts were by James Clerk Maxwell, König & Dieterici, and Abney at Imperial College) [1] and it is the basis for almost all other color spaces. Derivatives of the CIE XYZ space include: In the study of the perception of color, one of the first mathematically defined color spaces was the CIE XYZ color space (also known as CIE 1931 color space), created by the International Commission on Illumination (CIE) in 1931. ...
James Clerk Maxwell (13 June 1831 – 5 November 1879) was a Scottish mathematician and theoretical physicist. ...
Royal School of Mines Entrance Imperial College London is a college of the University of London which focuses on science and technology, and is located in South Kensington in London. ...
- CIELUV color space - a modification to display color differences more conveniently, replacing:
- CIE 1964 U*V*W* Uniform color space
- CIELAB color space
Also related is the CIE 1964 supplementary standard observer, which was based on measurements over a larger field of view (10 degrees) than the 1931 XYZ color space, producing slightly different results. Without further qualification, Lab color space refers to that of Hunter (Richard S Hunter, JOSA, 38, p 661 (1948)), which is an Adams Chromatic Valance Space. ...
Without further qualification, Lab color space refers to that of Hunter (Richard S Hunter, JOSA, 38, p 661 (1948)), which is an Adams Chromatic Valance Space. ...
Generic color models RGB uses additive color mixing, because it describes what kind of light needs to be emitted to produce a given color. Light is added together to create form from out of the darkness. RGB stores individual values for red, green and blue. RGBA is RGB with an additional channel, alpha, to indicate transparency. Image File history File links AdditiveColor. ...
Image File history File links AdditiveColor. ...
Image File history File links SubtractiveColor. ...
Image File history File links SubtractiveColor. ...
An RGB color space is any additive color space based on the RGB color model. ...
Additive color mixing: adding red to green yields yellow; adding yellow to blue yields white. ...
RGBA color space stands for Red Green Blue Alpha. ...
Common color spaces based on the RGB model include sRGB, Adobe RGB and Adobe Wide Gamut RGB. The title given to this article is incorrect due to technical limitations. ...
The Adobe RGB color space is an RGB color space developed by Adobe Systems in 1998. ...
The Adobe Wide Gamut RGB color space is an RGB color space developed by Adobe Systems as an alternative to the standard sRGB color space. ...
CMYK uses subtractive color mixing used in the printing process, because it describes what kind of inks need to be applied so the light remitted from the substrate and through the inks produces a given color. One starts with a white substrate (canvas, page, etc), and uses ink to subtract color from white to create an image. CMYK stores ink values for cyan, magenta, yellow and black. There are many CMYK colorspaces for different sets of inks, substrates, and press characteristics (which change the dot gain or transfer function for each ink and thus change the appearance). Cyan, magenta, yellow, and key (black) CMYK (or sometimes YMCK) is a subtractive color model used in color printing. ...
Subtractive color mixing An 1877 color photo by Louis Ducos du Hauron, a French pioneer of color photography. ...
An ink is a liquid containing various pigments and/or dyes used for colouring a surface to render an image or text. ...
Remission (lat. ...
Cyan, magenta, yellow, and key (black) CMYK (or sometimes YMCK) is a subtractive color model used in color printing. ...
YIQ was formerly used in NTSC (North America, Japan and elsewhere) television broadcasts for historical reasons. This system stores a luminance value with two chrominance values, corresponding approximately to the amounts of blue and red in the color. It corresponds closely to the YUV scheme used in PAL (Australia, Europe, except France, which uses SECAM) television except that the YIQ color space is rotated 33° with respect to the YUV color space. The YDbDr scheme used by SECAM television is rotated in another way. This article needs to be cleaned up to conform to a higher standard of quality. ...
The references in this article would be clearer with a different and/or consistent style of citation, footnoting or external linking. ...
Example of U-V color plane, Y value = 0. ...
Television encoding systems by nation PAL, short for Phase Alternating Line, is a colour encoding system used in broadcast television systems in large parts of the world. ...
SECAM, also written SÉCAM (Séquentiel couleur à mémoire, French for Sequential Color with Memory), is an analog color television system first used in France. ...
An image along with its Y, Db, and Dr components. ...
SECAM, also written SÉCAM (Séquentiel couleur à mémoire, French for Sequential Color with Memory), is an analog color television system first used in France. ...
YPbPr is a scaled version of YUV. It is most commonly seen in its digital form, YCbCr, used widely in video and image compression schemes such as MPEG and JPEG. YPbPr (also referred to as YPrPb, PrPbY, and PbPrY) is a color space used in video electronics. ...
A colour image and the Y, Cb and Cr elements of it. ...
Video compression refers to making a digital video signal use less data, without noticeably reducing the quality of the picture. ...
Image compression is the application of data compression on digital images. ...
The Moving Picture Experts Group or MPEG is a working group of ISO/IEC charged with the development of video and audio encoding standards. ...
In computing, JPEG (pronounced JAY-peg; IPA: ) is a commonly used standard method of compression for photographic images. ...
xvYCC is a new international digital video color space standard published by the IEC (IEC 61966-2-4). It is based on the ITU BT.601 and BT.709 standards but extends the gamut beyond the R/G/B primaries specified in those standards. xvYCC or Extended-gamut YCC is a new color space used in video electronics. ...
The International Electrotechnical Commission (IEC) is an international standards organization dealing with electrical, electronic and related technologies. ...
HSV (hue, saturation, value), also known as HSB (hue, saturation, brightness) is often used by artists because it is often more natural to think about a color in terms of hue and saturation than in terms of additive or subtractive color components. HSV is a transformation of an RGB colorspace, and its components and colorimetry are relative to the RGB colorspace from which it was derived. This article or section does not cite its references or sources. ...
HSL (hue, saturation, lightness/luminance), also known as HLS or HSI (hue, saturation, intensity) is quite similar to HSV, with "lightness" replacing "brightness". The difference is that the brightness of a pure color is equal to the brightness of white, while the lightness of a pure color is equal to the lightness of a medium gray. 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. ...
YBR (luminance, normalized red, normalized blue).
Commercial color spaces Munsell Color Wheel In colorimetry, the Munsell color system is a color system that specifies colors based on three color dimensions. ...
The Natural Color System (NCS) is a perceptual color model published by the Scandinavian Colour Institute of Stockholm, Sweden. ...
Special-purpose color spaces - The RG Chromaticity space is used in Computer vision applications, and shows the color of light (red, yellow, green etc.), but not its intensity (dark, bright).
The rg-chromaticity space is a two-dimensional color space in which there is no color intensity information. ...
Computer vision is the science and technology of machines that see. ...
Obsolete color spaces Early color spaces had two components. They largely ignored blue light because the added complexity of a 3-component process provided only a marginal increase in fidelity when compared to the jump from monochrome to 2-component color. The RG color space can produce shades of red, green, and yellow. ...
Logo celebrating Technicolors 90th Anniversary Technicolor is the trademark for a series of color film processes pioneered by Technicolor Motion Picture Corporation (a subsidiary of Technicolor, Inc. ...
References - ^ William David Wright, "50 years of the 1931 CIE Standard Observer. Die Farbe, 29:4/6 (1981).
- R. W. G. Hunt, The Reproduction of Colour in Photography, Printing & Television, 5th Ed. Fountain Press, England, 1995. ISBN 0-86343-381-2
- Mark D. Fairchild, Color Appearance Models, Addison-Wesley, Reading, MA (1998). ISBN 0-201-63464-3
- Charles A. Poynton, Introduction to Video Colour Spaces
See also . ...
Additive color mixing: adding red to green yields yellow; adding yellow to blue yields white. ...
Subtractive color mixing An 1877 color photo by Louis Ducos du Hauron, a French pioneer of color photography. ...
A color model is an abstract mathematical model describing the way colors can be represented as tuples of numbers, typically as three or four values or color components. ...
In the arts of painting, graphic design, and photography, color theory is a body of practical guidance to color mixing and the visual impact of specific color combinations. ...
A Color space consists of a color model along with a specific mapping of that model onto an absolute color space. ...
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