System CIE Lab scale initial CIE has established a scale for measuring color XYZ evidentiary used
to describe red (Red), green (Green) and blue (Blue), but because the colors can not describe the nature of darkness - light. of color CIE has developed a system XYL which described the red, green and brightness (lightness), respectively, such a system, it also lacks the description of the blue CIE has developed a color system later as an established and. The system is currently the most widely used L * -a * -b * color system, which is described by the 3D axis L * describe the brightness (lightness) of the + L * indicates white until it reaches. -L * a * axis represents black to describe the color from green (-a *) to red (+ a *) axis b * to describe the color from blue (-b *) to yellow (. b *) Narrative Feature of the CIE color shown in Figure 2.18 and 2.19, the company Hunter lab in America is another organization that conducts research and development of color measurement. Eventually, the system itself, which is called the Hunter lab color measurement systems, which described the Hunter lab scale in three dimensions, as well as by the Hunter lab system CIE Lab scale to describe the color as well as the L * -a * -. b * of CIE color difference between the CIE and Hunter lab is the formula to calculate the color of the Lab and L * -a * -b * Calculations are based on the total value of XYZ systems.
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