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 ?
These knowledge bases contain information about local and global features, context of each of the 11 Mediterranean landscape classes that we used, and information regarding optimal color spaces suitable for the classification of those classes.
It also supports industry standard color spaces including the wider ITU-R BT.
2 in both Adobe RGB and sRGB color spaces offer the truest view of the original image.
They determined the best color space among ten color spaces with fifteen truth images (Jose M Chaves, et al.
Other prevalent color spaces, such as hue-saturation value (HSV) and hue-saturation-luminance (HSL), suffer from the same problems as the RGB color space (Smith 1978).
0 supplies predefined settings and optimized profiles for most popular target color spaces.
GMG gamut mapping ensures that colors are ideally converted between different color spaces.
Andaro tint dispersions are another example of PPG's dedication to improving customers' paint processes and enable automotive manufacturers to express their brands' identities with unique color spaces.
HSV (hue, saturation, and value) is hexcone coordinate representation of points in RGB (red, green, and blue) color model as described in Color Spaces for Computer Graphics (Joblove & Greenberg, 1978).
There are lots of color spaces that have been used in early work of skin detection (5), such as RGB, Normalized RGB and HIS etc.
The segmentation through the perceptually uniform color spaces in the matter of discussion in section 5.
As found in practice there are different kinds of color spaces and solids applicable with a degree of accuracy to different situations.