QUANTIFICATION OF THE “PERCEIVED AGE” in COMET 2017
QUANTIFICATION OF THE “PERCEIVED AGE” OF A FACE BY IMAGE ANALYSIS ON CALIBRATED PHOTOGRAPHS
Jean Christophe PITTET
ORION Concept – 113 rue des Bordiers – 37100 Tours, France
Lot of researches and works were performed to innovate in the biometrology of the skin to demonstrated, objectively, the action of treatment of active molecule onto the skin.
Over the confirmation of their activities, the most important objective for the dermo-cosmetology remains that this effect is perceived by the user of these skin care products.
In consequence, we developed for many years some new approaches by image analysis of standardized photographs to quantify the perception of the effect of the cosmetic product, mainly on the face signs of the ageing : wrinkles an heterogeneity of the pigmentation. These analyses on a large amount of subjects allowed to defined various parameters as the “Age equivalent” and “Visibility index of wrinkles” based on a database containing more than 2000 women.
Acquisitions images : Professional Nikon camera on a dedicated bench with polarized Xenon flashes and standardized positioning of the head of subjects (HeadScan, OriontechnoLab, France). Acquisitions were performed in Crossed and Parallel polarized lighting.
Image analysis performed with a specific software developed by Orion Concept (FrameScan 3.3, OriontechnoLab, France) for the calculation of parametric images and extraction of various parameters in relationship with the ageing.
Panel : collection of 2105 women, aged from 19 to 76 years.
This work allowed to determine with a high accuracy, some new parameters correlated to the clinical evaluation and perception : “Age equivalent” calculated from the heterogeneity of the pigmentation and the “visibility of the wrinkles”. These parameters were calculated directly from quantitative information extracted from native or reconstructed images. The correlation with the clinical evaluation reached 0.91.
Based on this database and the statistical relationship between the objective quantification of the ageing signs extracted from calibrated photographs, we can obtain other parameters directly linked to the appearance and the clinical perception of the quality of face. This methodology is currently in progress to define the skin complexion and radiance.