color space

(redirected from Colour space)

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 ?
The projector claims to show 100% DCI-P3 colour space. It also claims to support HDR.
The Huawei Mate 20 thus delivers superb brightness and paired with its HDR10 compatibility and support for larger DCI-P3 colour space brings more colour variety.
"Moreover, it provides the industry-leading wide colour gamuts, complies with the DCI-P3 colour space with gamut ratio 114% and gamut coverage 99%, and supports the BT.2020 colour space.
The colour space conversion tool provides great flexibility in on-board colour space conversion: including RGB to HSI colour space conversion, and RGB to CIE-XYZ colour space conversion.
Summary: New Delhi [India], Mar 18 (ANI): Pantone, a US-based company best known for its proprietary colour space mechanism, announced UltraViolet as its 'Colour of the Year' for 2018.
"Samsung's 2017 QLED TV lineup offers dramatically improved colour performance, displaying DCI-P3 colour space accurately and - in another world first for Samsung, QLED TVs are capable of reproducing 100% colour volume.
These statistics are calculated for each component of the colour space (H, S, and V), and transform (range filter for V component, contours of S component) separately.
[9] presented a method based on YCbCr colour space and K-means clustering algorithm.
BASF says it extends the colour space potential of high chroma shades for packaging, consumer electronics, household appliances, sporting goods and other speciality applications.
The newly developed LED backlight combines with Studio Master Colour technology to achieve an expanded colour space which covers 98 per cent of the DCI standard.
Comparison of three methods for classification of pizza topping using different colour space transformations.
High Chroma Reds from Cathay Industries allows users to broaden the colour space of iron oxide pigments.