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Development and qualification of a machine learning algorithm for automated hair counting in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° S1 (11/2021)
[article]
Titre : Development and qualification of a machine learning algorithm for automated hair counting Type de document : document électronique Année de publication : 2021 Article en page(s) : p. 34-41 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Cheveux -- Comptage
Cheveux -- Croissance
Cheveux -- Soins et hygiène
Comptage
Imagerie (technique)
StatistiqueIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Determining the amount of hair on the scalp has always been an important metric of patient satisfaction for hair growth and hair retention technologies. While simple in concept, this measurement is a difficult, resource intensive task for the dermatologist and the research scientist. Specifically, counting and measuring hair in phototrichogram images is very time consuming and labour intensive. Due to cost, often only a fraction of available images is manually analysed. There is a need for an automated method that can significantly increase speed and throughput while reducing the cost of counting and measuring hair in phototrichogram images.
- Methods : Recent advances in machine learning and deep convolutional neural networks (deep learning) have led to a revolution in the analysis of image, video, speech, text and other sensor data. Image diagnostics have seen remarkable improvements with completely automated methods outperforming both human experts and human-engineered analysis methods. Deep learning methods can also provide speed and cost benefits. To enable use of a deep learning, we created a data set of 288 manually annotated phototrichogram images with marked location and length of each hair (the training dataset). We designed a custom neural network architecture and custom image processing algorithms to best utilize the available training data and to maximize performance for hair counting and length measurement. The performance of the algorithm was qualified by comparing hair count and length measurements to an independent ground truth method, the semi-manual Canfield's Hair Metrix method.
- Results : Leveraging deep neural networks, we have developed capability to apply machine learning to reduce the time needed to acquire data from phototrichograms of patients’ scalp from months to seconds. Our algorithm enables fast and fully automated hair counting and length measurement. The algorithm shows high agreement with human manually assisted analysis (ground truth).
- Conclusions : We have trained and deployed an algorithm utilizing this technology and have demonstrated the reproducibility, accuracy and speed of this algorithm that, once deployed, requires little to no recurring cost or manual intervention for its operation. The method allows fast analysis of large number of images, reducing study cost and significantly reducing study analysis time.Note de contenu : - Study design and statistical analysis
- Imaging area preparation
- Image capture
- Dataset selection
- Creation of training labels & training approach
- Automated hair detection method
- Image capture for treatment benefit confirmation
- Qualification / acceptance criteria
- Table 1 : Confirmation of ability to detect treatment benefits for hair countEn ligne : https://drive.google.com/file/d/1ffvEGbZIZECRgmeLo4cRVukZvv4ruIBF/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36878
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 43, N° S1 (11/2021) . - p. 34-41[article]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 Differences between perceived age and chronological age in women : A multi-ethnic and multi-centre study / Rainer Voegeli in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 5 (10/2021)
[article]
Titre : Differences between perceived age and chronological age in women : A multi-ethnic and multi-centre study Type de document : document électronique Auteurs : Rainer Voegeli, Auteur ; Rotraut Schoop, Auteur ; Elodie Prestat-Marquis, Auteur ; Anthony V. Rawlings, Auteur ; Todd K. Shackelford, Auteur ; Bernhard Fink, Auteur Année de publication : 2021 Article en page(s) : p. 547-560 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Âge chronologique
Femmes
Groupe ethnique
Imagerie (technique)
Perception de l'âge
StatistiqueIndex. décimale : 668.5 Parfums et cosmétiques Résumé : - Objective : Accuracy in assessing age from facial cues is important in social perception given reports of strong negative correlations between perceived age and assessments of health and attractiveness. In a multi-ethnic and multi-centre study, we previously documented similar patterns of female facial age assessments across ethnicities, influenced by gender and ethnicity of assessors.
- Methods : Here we extend these findings by examining differences between estimated age from digital portraits and chronological age (Δ age) for 180 women from three age groups (20–34, 35–49, 50–66 years) and five ethnicities (36 images of each ethnicity, assessed for age on a continuous scale by 120 female and male raters of each ethnicity).
- Results : Across ethnicities, Δ age was smallest in French assessors and largest in South African assessors. Numerically, French women were judged oldest and Chinese women youngest relative to chronological age. In younger women, Δ age was larger than in middle-aged and older women. This effect was particularly evident when considering the interaction of women's age with assessor gender and ethnicity, independently and together, on Δ age.
- Conclusion : Collectively, our findings suggest that accuracy in assessments of female age from digital portraits depends on the chronological age and ethnicity of the photographed women and the ethnicity and gender of the assessor. We discuss the findings concerning ethnic variation in skin pigmentation and visible signs of ageing and comment on implications for cosmetic science.Note de contenu : - Study sample
- Facial imaging
- Face ratings
- Statistical analysis
- Table 1 : Sociodemographic information and skin pigmentation of female and male assessors in the rating study
- Table 2 : Sociodemographic information and skin pigmentation of imaged female participants (n = 12 for each group, chronological age in years ± SD)
- Table 3 : Main and interaction effects of assessor ethnicity and gender, and participant ethnicity and age group, on differences between perceived and chronological age (Δ age) of female portraitsDOI : https://doi.org/10.1111/ics.12727 En ligne : https://drive.google.com/file/d/17PMapcZcJhKn_-Sd2WHq4uZ8M7av_CJ-/view?usp=shari [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36859
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 43, N° 5 (10/2021) . - p. 547-560[article]Les dispositifs térahertz pour scruter le coeur des matériaux / Thierry Antonini in INDUSTRIE & TECHNOLOGIES, N° 1051 (03/2022)
[article]
Titre : Les dispositifs térahertz pour scruter le coeur des matériaux Type de document : texte imprimé Auteurs : Thierry Antonini, Auteur Année de publication : 2022 Article en page(s) : p. 49-55 Langues : Français (fre) Catégories : Détection de défauts (Ingénierie)
Détection de dommages (matériaux)
Imagerie (technique)
Spectroscopie terahertzIndex. décimale : 664.07 Tests, analyses, contrôle de qualité Résumé : Les industriels recherchent de nouveaux outils pour contrôler les défauts à l'intérieur des matériaux complexes. Les dispositifs à ondes térahertz sont apparus pour réaliser de telles inspections, notamment dans des applications de contrôle en ligne des produits. Note de contenu : 1. Un nouveau champ à explorer
2. Plusieurs technologies coexistantes
3. Comment cartographier le matériau
4. Des possibilités pour mesurer l'épaissesur
5. La technique de l'imagerie volumique en 3D
6. Une technologie prometteuse
- Fig. 1 : Zone térahertz du spectre électromagnétique
- Fig. 2 : Les différentes configurations des dispositifs d'analyse par ondes térahertz
- Fig. 3 : Cartographie en 2D pour l'industrie
- Fig. 4 : Analyse par mesure du temps de vol
- Fig. 5 : Mesure de l'épaisseur de couches dans un revêtement ou un assemblage multi-matériauPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37059
in INDUSTRIE & TECHNOLOGIES > N° 1051 (03/2022) . - p. 49-55[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23243 - Périodique Bibliothèque principale Documentaires Disponible Dual functional replacement syntans for leather / Jaya Prakash Alla in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA), Vol. CXVI, N° 3 (03/2021)
[article]
Titre : Dual functional replacement syntans for leather Type de document : texte imprimé Auteurs : Jaya Prakash Alla, Auteur ; Nishad Fathima Nishter, Auteur ; Jonnalagadda Raghava Rao, Auteur Année de publication : 2021 Article en page(s) : p. 83-88 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse thermique
Calorimétrie
Cuirs et peaux -- Analyse
Cuirs et peaux -- Propriétés organoleptiques
Encapsulation
Imagerie (technique)
Microscopie électronique à balayage
Syntans
Transition de phaseEn physique, une transition de phase est une transformation du système étudié provoquée par la variation d'un paramètre extérieur particulier (température, champ magnétique...).
Cette transition a lieu lorsque le paramètre atteint une valeur seuil (plancher ou plafond selon le sens de variation). La transformation est un changement des propriétés du système.Index. décimale : 675.2 Préparation du cuir naturel. Tannage Résumé : In the present study we have synthesised thermoresponsive syntan using phase changing material (PCM) encapsulated into a replacement syntan. Syntan was analysed for their particle size, thermal response was verified using Differential scanning calorimetry (DSC) and surface morphology was analysed using scanning electron microscopy (SEM). These syntans were applied to leathers for making leather thermoresponsive. The thermal comfort range achieved on leathers prepared using the experimental syntan was about 2.5℃, compared to control of about 0.5℃ with an error of ±0.5℃. The physical and strength properties of experimental leathers were superior compared to control. Note de contenu : - MATERIALS AND METHODS : Materials - Syntan preparation - Leather application - Analysis of syntan - Analysis of leather - Strength property analysis - Organoleptic property analysis
- RESULTS AND DISCUSSION : Solid content and particle size analysis - Scanning Electron Microscopy aAnalysis of syntan - Differential Scanning Calorimetry analysis of syntan - Infra-red thermal imaging leathers - Scanning electron microscopy anlaysis of leather - Physical strength analysis of leathers - Organoleptic property analysis of leathers
- Table 1 : Detail description of leather processing
- Table 2 : Thermal analysis of control and experimental leathers
- Table 3 : Strength property analysis of control and experimental leathersDOI : https://doi.org/10.34314/jalca.v116i3.4248 En ligne : https://drive.google.com/file/d/1FTq1NucauDz-DFOooCMC6TOuyc3jXVA-/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35435
in JOURNAL OF THE AMERICAN LEATHER CHEMISTS ASSOCIATION (JALCA) > Vol. CXVI, N° 3 (03/2021) . - p. 83-88[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 22638 - Périodique Bibliothèque principale Documentaires Disponible Dynamic interferometric imaging of the thickness distribution of evaporating thin liquid films / Jacqueline Stamm in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 16, N° 6 (11/2019)
PermalinkEcotoxicological diagnosis in the tanning industry / Mwinyikione Mwinyihija / New York [United States] : Springer (2010)
PermalinkEffect of zein additive on perfume evaporation / Armelle Cabin-Flaman in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 40, N° 6 (12/2018)
PermalinkEffects of hair sprays on colour perception : a hyperspectral imaging approach to shine and chroma on heads / G. Puccetti in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 2 (04/2017)
PermalinkEliminating material dependency in spectra measurement via non-neighbouring band regression / Hui-Liang Shen in COLORATION TECHNOLOGY, Vol. 132, N° 2 (04/2016)
PermalinkEvaluating cracking using image analysis / B. Pourdeyhimi in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/95 (11/1995)
PermalinkFabric defect detection based on golden image subtraction / Jun-Feng Jing in COLORATION TECHNOLOGY, Vol. 133, N° 1 (02/2017)
PermalinkFast and reliable non-destructive inspection of composites / Vincent Revol in JEC COMPOSITES MAGAZINE, N° 106 (07/2016)
PermalinkFreezing of supercooled water drops on cold solid substrates : initiation and mechanism / Faryar Tavakoli in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 5 (09/2015)
PermalinkHigh-speed imaging the effect of snap-off distance and squeegee speed on the ink transfer mechanism of screen-printed carbon pastes / Sarah-Jane Potts in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 17, N° 2 (03/2020)
PermalinkHow rheological properties affect fine-line screen printing of pastes : a combined rheological and high-speed video imaging study / Chenhui Xu in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 15, N° 6 (11/2018)
PermalinkImagerie spectrographique et contrôle colorimétrique en ligne / Frédéric Jagneaux in L'INDUSTRIE TEXTILE, N° 1343 (07-08/2002)
PermalinkImagerie de suspensions pour la mesure des contraintes particulaires dans les suspensions non-browniennes / E. d'Ambrosio in RHEOLOGIE, Vol. 40 (12/2021)
PermalinkImageries électrochimiques et surfaces fonctionnelles / Sophie Griveau in L'ACTUALITE CHIMIQUE, N° 400-401 (10-11/2015)
PermalinkImaging and visualization : A game changer in claim substantiation / Remo Campiche in SOFW JOURNAL, Vol. 147, N° 12 (12/2021)
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