Table 1.

Best statistical descriptors, corresponding experimental upper and lower thresholds, and total cumulative sensitivity.

Parameter	Upper Threshold	Lower Threshold	Cummulative Sensitivity
Min. of the reflectance at 414 nm (minus skin)	0.8	−0.33	36%
Absorbance in terms of σ at 477 nm	0.082	0.039	43%
Absorbance in terms of the energy at 477 nm	0.125	0.046	50%
Reflectance in terms of energy at 524 nm	0.28	0.03	64%
Reflectance in terms of the skewness at 721 nm	1.8 × 10−3	−2	71.5%
Reflectance in terms of the mean at 995 nm	0.55	0.4	83%
Absorbance (minus skin) in terms of σ at 1214 nm	0.082	0.04	91%
Minimum of the absorbance at 1613 nm	1.95	1.18	100%