What is the CIELAB system?

Published in 1976 by the International Commission on Illumination, the CIELAB. system has become the universally accepted colorimetric reference system for. quantifying and communicating color. CIELAB is the reference color model used. by the paper making and graphic arts industries.

How is chroma represented in CIELAB?

Hue and chroma can be visualized and quantified by using the a*b*-plane of the CIELAB color space. A saturated (or brilliant) color is represented by a color point that is far away from the lightness axis. The color point of a pale (or dull, or pastel) color, a color of low saturation, is close to the L*-axis.

What is CIELAB used for?

CIELAB or CIE L*a*b* is a device-independent, 3D color space that enables accurate measurement and comparison of all perceivable colors using three color values. In this color space, numerical differences between values roughly correspond to the amount of change humans see between colors.

What is white in CIELAB?

The reference white provides information about how a highly reflective (white) surface would look under these lighting conditions, which then allows other colors to be interpreted relative to that white. In the “Luminance” (L) axis of CIELab space, this white would be the 100 on the 0-100 scale.

What is Lab color scheme?

Lab Color is a more accurate color space. It specifies a color using a 3-axis system. The a-axis (green to red), b-axis (blue to yellow) and Lightness axis. The best thing about Lab Color is that it’s device-independent. That means that it’s easier to achieve exactly the same color across different media.

What is chroma and hue angle?

Value (lightness) describes overall intensity to how light or dark a color is. It is the only dimension of color that may exist by itself. Chroma (Saturation) may be defined as the strength or dominance of the hue. On the outer edge of the hue wheel are the intensely saturated hues.

Is hue a color?

Hue literally means colour. When it is used in a colour name, it indicates that a modern pigment has been used instead of the traditional one. For example, Cadmium Red Pale Hue is a “colour of cadmium red pale”. It is important to note that a hue colour is not necessarily inferior.

Why is CIELAB a color space?

CIELAB is less uniform in the color axes, but is useful for predicting small differences in color. The CIELAB coordinate space represents the entire gamut of human photopic (daylight) vision, and far exceeds the gamut for sRGB or CMYK.

What is lab values in printing?

LAB Color Values / Color Spaces Like geographic coordinates – longitude, latitude, and altitude – L*a*b* color values give us a way to locate and communicate colors.

What is lab vs RGB?

RGB operates on three channels: red, green and blue. Lab is a conversion of the same information to a lightness component L*, and two color components – a* and b*. Lightness is kept separate from color, so that you can adjust one without affecting the other.

What is CIE color model?

The CIE color model is a color space model created by the International Commission on Illumination known as the Commission Internationale de l’Elcairage (CIE).

What is CIE Lab color space?

The CIELAB color space (also known as CIE L*a*b* or sometimes abbreviated as simply “Lab” color space) is a color space defined by the International Commission on Illumination (CIE) in 1976. It expresses color as three numerical values, L* for the lightness and a* and b* for the green–red and blue–yellow color components.

What is CIE 1976 Lab color space?

The CIE 1976 L*a*b* color space (also referred to as CIELAB) is one of the most popular color spaces for measuring object colors . It was defined by CIE in 1976 for color communication and is widely adopted today in many industries for color control and management.

What is Lab color space?

A Lab color space is a color-opponent space with dimension L for lightness and a and b for the color-opponent dimensions, based on nonlinearly compressed CIE XYZ color space coordinates.