FACTOID # 10: The total number of state executions in 2005 was 60: 19 in Texas and 41 elsewhere. The racial split was 19 Black and 41 White.
 
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Encyclopedia > RGB color space

An RGB color space is any additive color space based on the RGB color model. 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. ... The RGB color model utilizes the additive model in which red, green, and blue light are combined in various ways to create other colors. ...


RGB is shorthand for Red, Green, Blue.


RGB is a convenient color model for computer graphics because the human visual system works in a way that is similar - though not quite identical - to an RGB color space. The most commonly used RGB color spaces are sRGB and Adobe RGB, which has a significantly larger gamut than sRGB. Adobe has recently developed another color space called Adobe Wide Gamut RGB, which is even larger, in detriment of gamut density. Computer graphics (CG) is the field of visual computing, where one utilizes computers both to generate visual images synthetically and to integrate or alter visual and spatial information sampled from the real world. ... CIE 1931 xy chromaticity diagram showing the gamut of the sRGB color space and location of the primaries. ... The Adobe RGB color space is an RGB color space developed by Adobe Systems in 1998. ... In computer graphics, the gamut, or color gamut, is a certain complete subset of colors. ... CIE 1931 xy chromaticity diagram showing the gamut of the sRGB color space and location of the primaries. ... 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. ... 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. ...


As of 2004, sRGB is by far the most commonly used RGB color space, particularly in consumer grade digital cameras, because it is considered adequate for most consumer applications, and its design simplifies previewing on the typical computer display. Adobe RGB is also being built into more medium-range digital cameras, and is favored by many professional graphic artists. 2004 is a leap year starting on Thursday of the Gregorian calendar. ... CIE 1931 xy chromaticity diagram showing the gamut of the sRGB color space and location of the primaries. ... [[Image:monitor. ...


RGB spaces are generally specified by defining three primary colors and a white point. In the table below the three primary colors and white points for various RGB spaces are given. The primary colors are specified in terms of their CIE chromaticity coordinates (x,y). 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. ... CIE is an acronym which can stand for Córas Iompair Éireann, Irish transport company; the International Commission on Illumination; the postnominal of a Companion of the Order of the Indian Empire; Cambridge International Examinations, an international examination board. ...

Some RGB color space parameters (from Susstrunk, Buckley and Swen 2005)
Color Space Gamut White Point Primaries
xR yR xG yG xB yB
ISO RGB Limited floating floating
Extended ISO RGB Unlimited (signed) floating floating
sRGB,
HDTV (ITU-R BT.709-3)
CRT D65 0.64 0.33 0.30 0.60 0.15 0.06
ROMM RGB Wide D50 0.7347 0.2653 0.1596 0.8404 0.0366 0.0001
Adobe RGB 98 CRT D65 0.64 0.34 0.21 0.71 0.15 0.06
Apple RGB CRT D65 0.625 0.34 0.28 0.595 0.155 0.07
NTSC (FCC 1953) CRT Ill. C 0.67 0.33 0.21 0.71 0.14 0.08
NTSC (1979)
(SMPTE C, SMPTE-RP 145)
CRT D65 0.63 0.34 0.31 0.595 0.155 0.07
PAL/SECAM
(EBU 3213, ITU-R BT.470-6)
CRT D65 0.64 0.33 0.29 0.60 0.15 0.06
CIE (1931) Wide E 0.7347 0.2653 0.2738 0.7174 0.1666 0.0089

It has been suggested that High Definition Video be merged into this article or section. ... NTSC is the analog television system in use in Japan, United States and certain other places, mostly in the Americas (see map). ... The abbreviation FCC can refer to: Face-centered cubic (usually fcc), a crystallographic structure Federal Communications Commission, a US government organization Farm Credit Corporation/Farm Credit Canada, a Canadian government organization Families with Children from China, an adoption support organization Florida Christian College, a college in central Florida Fresno City... The Society of Motion Picture and Television Engineers or SMPTE (pronounced simptee or sometimes sumptee) is a US professional association of engineers. ... For other meanings of PAL see PAL (disambiguation). ... SÉCAM (Séquentiel couleur à mémoire, French for sequential colour with memory) is an analog color television system first used in France. ... The European Broadcasting Union (EBU), known in French as LUnion Européenne de Radio-Télévision (UER), and unrelated to the European Union, was formed February 12, 1950 by 23 broadcasting organizations from Europe and the Mediterranean at a conference in the coastal resort of Torquay in Devon... 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. ...

See also

The HSV (Hue, Saturation, Value) model, also called HSB (Hue, Saturation, Brightness), defines a color space in terms of three constituent components: HSV color space as a color wheel Hue, the color type (such as red, blue, or yellow): Ranges from 0-360 (but normalized to 0-100% in some... The HLS color space, also called HSL or HSI, stands for Hue, Saturation, Lightness (also Luminance or Luminosity) / Intensity. ...

External links

  • Susstrunk, Buckley and Swen, "Standard RGB Color Spaces" (PDF)
  • sRGB vs Adobe RGB: The Truth - a summary of the practical aspects of using the two spaces
  • A paper comparing RGB color spaces - an Adobe PDF document
  • RGB Working Space Information

  Results from FactBites:
 
Color - definition of Color in Encyclopedia (4117 words)
Color (or colour) is a sensation which (in humans) derives from the ability of the fine structure of the eye to distinguish three differently filtered analyses of a view.
Structural color is a property of some surfaces that are scored with fine parallel lines, formed of many thin parallel layers, or otherwise composed of periodic microstructures on the scale of the color's wavelength, to make a diffraction grating.
Again, compare variations on gray backgrounds—#7f7f7f, #5f5f5f and #9f9f9f—the eight RGB primaries are equidistant from #7f7f7f in a 3-d geometrical representation of RGB color space—a reminder of the importance of background color for color perception.
RGB color model - Wikipedia, the free encyclopedia (1684 words)
The RGB color model utilizes the additive model in which red, green, and blue light are combined in various ways to create other colors.
One common application of the RGB color model is the display of colors on a cathode ray tube, liquid crystal display, or plasma display, such as a television or a computer's monitor.
Instead, video RGB uses a convention with scaling and offsets such that (16, 16, 16) is fl, (235, 235, 235) is white, etc. For example, these scalings and offsets are used for the digital RGB definition in CCIR 601.
  More results at FactBites »

 
 

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