A mathematical derivative of CIE XYZ (1931) that describes colors using three synthetic primaries: L* (which indicates Lightness), a* (which indicates red-greenness), and b* (which indicates yellow-blueness).
(CIELab) : the color space defined by the CIE in 1976 (also called the Lab color space), built by the CIELAB color model with one channel for luminance (lightness, L) and two color channels ( and ); the axis extends from green (-a) to red (+a) and the axis from blue (-b) to yellow (+b). CIELAB is a response to the problem with the XYZ color space where colorimetric distances between the individual colors do not correspond to perceived color differences; in CIELAB the color differences perceived by human eye correspond to distances measured colorimetrically. Because CIELAB describes how a color looks rather than how much of a particular colorant is needed for a device to produce colors, CIELAB is considered to be a device independent color model. color model color space games : tennis
Color space in which values L*, a* and b* are plotted at right angles to one another to form a three dimensional coordinate system. Equal distances in the space approximately represent equal color differences. Value l* represents Lightness; value a* represents the Redness/Greenness axis; and value B.Arch. represents the yellowness/blueness axis. CIELAB is a popular color space for use in measuring reflective and transmissive objects.
A color system created by the Commission Internationale de l'Eclairage to produce a color space consisting of all visible colors. The CIELAB system, sometimes shortened to just "Lab," forms the basis for most contemporary color-matching systems and lets you convert, for example, RGB image to Lab to CMYK to produce accurate color-matching.
CIE stands for "Commission Internationale de l'Eclairage," an international group of colour scientists whose standards make it possible to accurately communicate colour information. "L" describes relative luminance, "A" represents relative redness-greenness, and "B" represents relative yellowness-blueness. CIELAB colour is a colour space that encompasses RGB and CMYK, and describes generally the visible spectrum that the human eye can see.
is a system that is used to define total colour difference by combining three independent variables based on the three opponent pairs of colour vision: white-black, red-green, and yellow-blue.
Internationally accepted color space model used as a standard to define color within the graphic arts industry,as well as other industries. The three-dimensional model designates L for lightness axis, A for the red-green axis and B for the yellow-blue axis.
A system of colour measurement. L*a*b* measurements are the numerical representation of any colour.
This is a convention for specifying colors via a "color space" which is independent of the type of device or media on which a color image or document is reproduced.
( International Committee on Illumination) The most widely recognized color matching system for describing colors with numbers. A Physical color chip is usually required along with the numeric coordinates to match the color using the system.
A colour model to approximate human vision. The model consists of three variables: L* for luminosity, a* for one colour axis, and b* for the other colour axis. CIELAB is a good model of the Munsell colour system and human vision.
Space chromatic standardized in three dimensions worked out by the Co in 1976. "L *" represents the luminosity, "A *" represents the co-ordinate of the color on the axis Rouge/Green and "B *" represent the co-ordinate of the color on the axis Jaune/Blue. Lab space (as it is often called) is linear according to perception, this fact two colors close one to the other have close co-ordinates numerically. L*: variable of clearness L*= 116 [Y/Yn]1/3 - 16 A * and B *: co-ordinates of chromaticity: a* = 500 [(X/Xn)1/3- (Y/Yn)1/3] b* = 500 [(Y/Yn)1/3 - (Z/Zn)1/3
