ABSTRACT

Choi et al (2014) used computer-aided image analysis to test and compare the three global objective erythema index (OEI) candidates. In the aspect of clinical correlation, the red-blue dierence index (RBI) was unsatisfactory despite its simple algorithm. e a* color values measured by colorimeter or erythema index (EI) by Mexameter and erythema dose (ED) were positively correlated with each other, and both showed a good correlation with subjective erythema index (SEI).