color space

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color space

A system for describing color numerically. Also known as a "color model," the most widely used color spaces are RGB for scanners, cameras and displays, CMYK for color printing and YUV for TV/video. Prior to the proliferation of electronic displays, which are all RGB, color spaces were developed that were closer to the way people think about color. For example, the CIE Lab model uses lightness (L) and values on red-green (a) and blue-yellow (b) axes, while HSB uses hue, saturation and brightness. See CIE Lab, HSB, HSL, RGB, sRGB, YUV, xvYCC and color space conversion.


HSB, CIE Lab, RGB and CMYK
All four color spaces in this Photoshop color picker relate to each other. Although numbers can be entered, users mostly move the vertical slider or point into the box to select a color. In this example, the R in RGB is selected, and moving the slider changes Red from 0 to 255 and all related values in the other color spaces at the same time.







A More Intuitive Model
In the 1970s, Alvy Ray Smith developed the HSB model for color selection. Changing red to pink by reducing saturation (S) is more intuitive than changing green and blue in RGB. For details, see HSB. For invaluable information about color spaces and computer graphics (CG) from one of the country's most distinguished experts, visit www.alvyray.com, and click Papers and CG.







Color Space Conversion
Since displays, printers and TV/video all use different color spaces, conversion between them is necessary and commonplace.
References in periodicals archive ?
Therefore, majority of color spaces (YCbCr, HSV, YUV, HSL, YIQ etc.
0 has a clear description of color management systems and the necessity for the use of color spaces that are independent of any device.
Support for the International Color Consortium (ICC) color management specification for mapping RGB color spaces to CMYK
New software in the Color Cue(TM)2 enables designers to translate PANTONE Colors for use in different color spaces and popular image editing software, as well as accurately specify and communicate color for four-color process and Hexachrome(R) printing and the Web.
Including conversion formulas for multiple color spaces in a single guide makes it easier for designers to evaluate color choices when repurposing content for different media.
The sRGB mode is the color space used in most digital cameras, which is an international standard to unify color reproduction and color spaces as defined by the International Electrotechnical Commission (IEC).
It enables high-speed RAW image processing and preview, support for sRGB, Adobe RGB and Wide Gamut RGB color spaces and is Color Management System (CMS) compatible.
files patents on their breakthrough that creates a gateway between all known color spaces and enables easy color formulation for millions of colors in diverse materials.
To its credit, the Canon imageRUNNER and CLC series units continued to lead the monochrome and color spaces.
Source code is also included in the color kit for Agfa Monotype's Color Management System (CMS) and Color Management Module (CMM), which allows for color transformations between standard color spaces.
But combustion 2 is not just about compositing -- its color correction tools, keyer and ability to mix and match color spaces is amazing," said Nagel.