Validation of the Visia ® Camera System for skin analysis through assessment of the correlations among the three offered measurements – the percentile, feature count and absolute score – as well as the three capture perspectives, from the left, front and right
Helga Henseler
Abstract
Objective: Camera System in terms of providing data on various skin aspects via the establishment of the correlations among the obtained measurements - the percentile, feature count and absolute score. Method: Camera System, which provided measurements firstly as percentiles, secondly as feature counts and thirdly as absolute scores on eight different skin aspects. The eight skin criteria were spots, wrinkles, skin texture, pores, UV spots, brown spots, red marks and porphyrins. Data on the facial skin were gathered from three different perspectives, namely the left, front and right views. The correlations between pairs of the three obtained measurements, i.e., the percentile, the feature count and the absolute score, were calculated. Further, the correlation coefficients for the three capture perspectives, from the left, front and right, were calculated. Data from the two time points, i.e., before and after application of the skin care cosmetic line were analysed. The statistical analyses were conducted using R (R Core Team 2016). Results: Camera System was found to be an objective tool with which to examine the effects of a cosmeceutical skin care regime. However, there was a learning curve associated with the application of this system. Conclusion: Camera System was successfully validated by investigation of the correlations between measurement methods and capture perspectives. The camera system can not only serve as a tool with which to visualise, provide communications concerning or sell a skin care product, but it can also provide objective data for clinical follow-up studies. Thus, investigations into which skin aspect can be improved the most by a cosmetic product line are possible.