Digital Photographic RGB Scores used for the Evaluation of Skin Color Treesirichod Arucha1,*, Chansakulporn Somboon1, Wattanapan Pattra2 1Department of Pediatrics, Srinakharinwirot University, HRH Princess, Maha Chakri Sirindhorn Medical Center, Rangsit-Nakhonnayak Road, Ongkharak, Nakhonnayok, Thiland 2Suranaree University of Technology, Thailand *Corresponding Author: Email: trees_ar@yahoo.com
Online published on 3 March, 2016. Abstract Background The photograph is one method that has been used for the evaluation of skin color. The numeric values extracted from the photographs could be of value for statistical assessment. Objective To assess the correlation between skin color evaluation using a narrowband reflectance spectrophotometer (Mexameter MX18) and digital photographic RGB scores. Methods The participants were evaluated for skin color by a narrowband reflectance spectrophotometer (Mexameter MX18) and had taken the photographs for RGB scores assessment from the photography computer program (Adobe® Photoshop CS2 version 9). Skin color was measured on four different anatomical skin sites of each participant. These sites were on the medial aspect of the volar and the dorsal regions of both forearms. Statistical analysis used Pearson correlation Results A total of 208 records from 52 participants were established. The average of R, G, B and sum of the RGB scores from photographs were 162.4±11.9, 147.5±17.6, 135.4±24.8 and 445.3±51.9 respectively. The correlation coefficient of the digital photographic RGB scores and each index; M, E and M plus E indices were at −0.85, -0.81 and -0.85 respectively with a statistical significance of P < 0.001. Conclusions Skin color evaluation using a narrowband reflectance spectrophotometer has shown an inverse correlation with a digital photographic RGB scores. Top Keywords Digital photographic RGB scores, mexameter MX18, narrowband reflectance spectrophotometer. Top |