Fig 1.
The Fitzpatrick skin phototype scale.
Fig 2.
The CIELAB colour space.
Fig 3.
Equation used to calculate the individual typology angle using L* and b* values from the CIELAB colour space.
Table 1.
Skin colour categories as proposed by Del Bino et al. based on individual typology angle (ITA°) calculated from reflectance spectrophotometry measurements.
Fig 4.
A thermal image of a participants arm with electrical tape in situ (El1).
Table 2.
Self-reported ethnicity of participants into categories outlined in the 2011 population census of England and Wales.
Table 3.
The distribution of participants according to Fitzpatrick Skin Phototyping (FST) group and the mean calculated emissivity for each FST group.
Table 4.
The distribution of participants according to individual typology angle (ITA°) group and the mean calculated emissivity for each ITA° group.