Commission Internationale de l’Eclairage (CIE), a non-profit organization considered to be the authority on the science of light and color, has defined color spaces, including CIE XYZ, CIE L*a*b*, and CIE L*C*h, for communicating and expressing object color.

CIE-based LCh color spaces are transformations of the two chroma values (ab or uv) into the polar coordinate. The source color spaces are still very well-regarded for their uniformity, and the transformation does not cause degradation in this aspect.

The LCh (or HLC) color space is not the same as the HSV, HSL or HSB color models, although their values can also be interpreted as a base color, saturation and lightness of a color. The HSL values are a polar coordinate transformation of what is technically defined RGB cube color space.

CIE L*C*h color space is a vector representation of the CIE L*a*b* color space. L* indicates lightness, the C* is the chroma axis and h is the hue angle.

2025年1月9日 · CIE Lab is extensively used in many industries apart from printing and photography. Its uses include providing exact colour specifications for paint (including automotive, household, etc.), dyes (including textiles, plastics, etc.), printing ink and paper.

2024年12月4日 · CIE LCH. CIE LCH is the cylindrical model of CIE Lab equivalent to HSV of RGB in which LCH represents Lightness, Chroma, and Hue (this Hue is similar to HSV Hue, but red is 24 degrees, green is 162 degrees, and blue is 246 degrees [6]).

2022年12月10日 · LCH is a color space designed to represent colors in a way that is more similar to how the human eye perceives them. This quality, known as perceptual uniformity, makes LCH an excellent choice for creating accessible, consistent, and predictable color systems in design.

2021年12月6日 · LCh is only a conversion from cartesian coordinates to polar coordinates, but the underlying color model is the same. Longer Answer. The 1931 CIE "standard observer" is a device independent "virtual eye" that is based on studies of human perception of color.

2020年11月30日 · D65 is the CIE standard, and D65 is the standard for nearly all display colorspaces and working spaces including sRGB which is the default standard for web content. This seems related to the use of ICC profiles where OpenColorIO LUTs may be more appropriate (especially for HDR).

The CIELAB, or CIE L*a*b* which is an improvement on the CIE Lab, is a color space that has been specifically designed to accurately map color perception. It is commonly used in color manipulation software since it so accurately stores and aids in …