which is also referred to as the CIELAB system, originally defined by the CIE in 1976 [8]. Within this system, L is a measure of the lightness of the colour of the sample, a measures the red and green characteristics, and b measures the yellow and blue characteristics [7–9]. These colour-measurement instruments are
widely used throughout the food and agricultural industries to monitor colour of products such as meat [10], coffee [11], tea
[12], cheese [13], tomato [14], and flour [15]