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Development of an image-based gloss measurement instrument / Frédéric Bernard Leloup in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 4 (07/2019)
[article]
Titre : Development of an image-based gloss measurement instrument Type de document : texte imprimé Auteurs : Frédéric Bernard Leloup, Auteur ; Jan Audenaert, Auteur ; Peter Hanselaer, Auteur Année de publication : 2019 Article en page(s) : p. 913-921 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Aspect peau d'orange (peinture)
Brillance (optique) -- Mesure
Imagerie (technique)Tags : Glossomètre 'Mesure de brillance basée sur l'image' 'Brillant spéculaire' contraste' 'Epluchure d'orange' Index. décimale : 667.9 Revêtements et enduits Résumé : This paper reports on the development of a measurement instrument to perform gloss measurements using an image-based detector. The image-based gloss meter was built according to the specifications of the optical layout of a specular gloss meter in a 60° measurement geometry, as described in ASTM D523-14. The photodiode detector was thereby substituted with a CMOS detector. The optical layout of the system was designed and validated by the use of ray tracing software. A series of 16 matte to high-gloss test samples, with nominal gloss values ranging between 3 and 90 gloss units, was used to compare specular gloss measurements obtained with the developed instrument and a commercial specular gloss meter. An average and maximum deviation of only 1.2 and 2.7 gloss units, respectively, was obtained, confirming the suitability of the system to perform standard specular gloss measurements. The potential benefits of the image-based approach were then studied. By way of example, the optical characterization of orange peel and contrast gloss by the use of the system was discussed, corroborating the fact that the proposed instrument offers important opportunities for a more global characterization of the total gloss impression. Note de contenu : - INSTRUMENT DESIGN : Geometry - General description
- MEASUREMENTS : Specular gloss - Additional attributes of surface gloss
- ORANGE PEEL
- CONTRAST GLOSSDOI : 10.1007/s11998-019-00184-8 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-019-00184-8.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32849
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 16, N° 4 (07/2019) . - p. 913-921[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 21127 - Périodique Bibliothèque principale Documentaires Disponible Quantification and prediction of visually perceived specular gloss at three illumination/viewing geometries / Fereshteh Mirjalili in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 13, N° 2 (03/2016)
[article]
Titre : Quantification and prediction of visually perceived specular gloss at three illumination/viewing geometries Type de document : texte imprimé Auteurs : Fereshteh Mirjalili, Auteur ; Siamak Moradian, Auteur ; Farhad Ameri, Auteur ; Mohammad Amani Tehran, Auteur Année de publication : 2016 Article en page(s) : p. 239-256 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Brillance (optique)
Eclairage
Evaluation visuelle
Mesure
vision des couleursTags : 'Brillant spéculaire' 'Evaluation visuelle' 'Niveau de brillance achromatique' 'Eclairage unidirectionnel' 'Brillance mètre trois angles' Index. décimale : 667.9 Revêtements et enduits Résumé : In the present study, attempts were made to clarify the existence of a correlation between visually perceived and instrumentally measured specular gloss of a series of achromatic samples. To this end, seven achromatic physical scales of specular gloss each consisting of 10 or 11 samples were prepared using lithographically printed black, white, and five in between gray papers. The samples were visually assessed and subsequently quantified in terms of a visually uniform color constant lightness scale, by a panel of 14 observers in an especially designed unidirectional light compartment at three illumination/observation geometries, namely 20°/20°, 60°/60°, and 85°/85°. Four statistical parameters were utilized to determine the correlation between visually perceived and instrumentally measured specular gloss. The results show that the instrumental 60°/60° geometry is capable of efficiently quantifying the equivalent specular gloss as perceived by a human observer. Surprisingly, it was also possible to accurately predict the visually quantified specular gloss both at the 20° and the 85° geometries by the aid of applying special linear relationships derived from the instrumentally measured specular gloss of the 60° geometry. Note de contenu : - EXPERIMENTAL : Preparation of specular gloss scales - Instrumental characterization - Visual assessments
- RESULTS AND DISCUSSION : Correlation between visual results and instrumental measurementsDOI : 10.1007/s11998-015-9756-2 En ligne : https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9756-2.pdf Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26109
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 13, N° 2 (03/2016) . - p. 239-256[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 17962 - Périodique Bibliothèque principale Documentaires Disponible