Video-based paired comparison to evaluate some cosmetic products under camera movement for dynamic performance / Emilie Yokoyama in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 45, N° 4 (08/2023)  

[article]  inINTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 45, N° 4 (08/2023) . - p. 480-487 Titre : Video-based paired comparison to evaluate some cosmetic products under camera movement for dynamic performance Type de document : document électronique Auteurs : Emilie Yokoyama, Auteur ; Ghislain Francois, Auteur ; Margalith Harrar, Auteur ; Chafik Bachatene, Auteur ; Kumiko Udodaira, Auteur ; Solène Trevisan, Auteur ; Alexandre Nicolas, Auteur ; Damien Velleman, Auteur ; Frédéric Flament, Auteur Année de publication : 2023 Article en page(s) : p. 480-487 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Brillance (optique) -- Mesure Cosmétiques Couleur Evaluation Imagerie numérique Justification de l'allégation Maquillage Méthodologie Statistiques Index. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Until now, standardized evaluation of cosmetic effects was conducted mainly in still conditions such as pictures. In real life, the consumers' experience of their cosmetics' effects is dynamic and some of the benefits can be better observed under movement. In order to capture motion-related performance of cosmetics, we developed a video-based paired comparison on an online platform. - Methods : We validated this new tool through the evaluation of eyeshadow with high light reflection and colour gradation, especially visible under motion according to the observer point of view. This formula was compared with two marketed benchmarks. The three products were applied sequentially on the eyelid of eight Japanese women. Videos were taken in standardized light, speed and face position with a rotating camera around the face. The videos were uploaded on an online secured platform and eyelid 3D effect, highlight and colour gradation were evaluated through paired comparison test by 60 Japanese women from home on their PC or tablets. Those results were compared with picture-based paired comparison by the same observers. - Results : Video-based paired comparison provided higher discrimination of products compared to picture-based comparison. - Conclusion : As compared to still camera acquisition, the evaluation of cosmetics based on videos is closer to real-life experience and can bring higher discrimination, especially for motion-related attributes. Note de contenu : - MATERIALS AND METHODS : Methodology - Subjects - Makeup application - Video and picture recording - Online evaluation system - Raters - Test flow - Statistical analysis - RESULTS : User interface DOI : https://doi.org/10.1111/ics.12857 En ligne : https://drive.google.com/file/d/16Rs4ZcqjTn2cIyKDm5Zzc_Py_Jx0nU4a/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39878 [article]

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