From the CIE Lab values of a standard and a sample, computes the delta-E colour difference, grey-scale fastness grade and pass/fail verdict.
色差质量评估计算器,依据标准样与试样的 CIE Lab 色度值,计算 ΔE 总色差及明度、饱和度、色相分量差,并按灰卡标准评定色牢度等级与合格性。