Color Parameters L A B at Color

Color Parameters L A B. A colorimetrically measured red apple whose chromaticity coordinates are x = 0.4832 and y = 0.3045 can be located in this color space at position a (the blue circle). The values of l*, a*, and b* are calculated according to the formulas below:

Color parameters (L*, a*, and b*) of araçá jam stored at room... Download Scientific Diagram
Color parameters (L*, a*, and b*) of araçá jam stored at room... Download Scientific Diagram from www.researchgate.net

It expresses color as three values: In the cie (l*, a*, and b*) color space, abbreviated cielab, the lightness coefficient, l*, ranges from black = 0 to white = 100. That is, for specimens compared to a standard, color differences (distances) in any direction are of about the same importance (weight).

Color parameters (L*, a*, and b*) of araçá jam stored at room... Download Scientific Diagram

There were several permutations of the hunter l, a, b color scale before the current formulas were released in 1966. In cie l*a*b* colour space, those three matrices are the matrix of pixel values of lightness l, the matrix of pixel values of parameter a (greenness to redness) and the matrix of pixel values of parameter b (blueness to yellowness). The values of l*, a*, and b* are calculated according to the formulas below: The cielab color space also referred to as l*a*b* is a color space defined by the international commission on illumination in 1976.