color space


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Related to color space: color space conversion

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 ?
So from the HSI color space 'S' image plane was used for the segmentation of fruit regions.
The Lab* color space is based on the three attributes of color: hue, saturation and lightness.
The formula to transform XYZ to CIELab color space is defined as:
The performance was measured by conversion of 125 million pixels from RGB to HSV color space.
From this experiments, we concluded that the best performance was obtained using RGB vector color space when compare to k-means cluster algorithm to segment the skin pixels in the given color images.
Figure 5 shows the result of segmenting a flower from the leaves using single phase levelset through the HSI color space.
To add a bit of drama, three color spaces are marked "Backward.
Caetano and Barone (2001) presented a multivariate statistical model in the chromatic subspace of normalized RGB color space for human skin-color identification over the skin samples of black and white people.
2020) color space employed in the 4K TV broadcasting tests carried out earlier this year in Japan, the firmware upgrade for the EOS C500 and EOS C500 PL camera models facilitates the capture of high-resolution video supporting the color space employed in the ITU-R BT.
In fact this color space was used very often in skin pixel classification (Gonzales & al.
But it isn t only the size of the screen that makes the monitor so adept with multimedia, the EA93 accurately captures 100 percent of the defined sRGB color space, and the monitor delivers 300nit brightness for higher quality, more lifelike colors.
CIELAB-based color management uses the CIELAB color space to quantify color, independent of the device used to produce that color.