| Titre : |
UV reflectance photography of skin : what are you imaging ? |
| Type de document : |
texte imprimé |
| Auteurs : |
Jonathan M. Crowther, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 136-145 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Chimie analytique
Emulsions -- Emploi en cosmétologie
Formulation (génie chimique) -- Stabilité
Peau -- analyse
Photographie
Spectroscopie de réflectance
|
| Index. décimale : |
668.5 Parfums et cosmétiques |
| Résumé : |
- OBJECTIVE : Photography can be a powerful tool for researching the skin. Moving outside the visible spectrum and into the ultra violet (UV) presents a unique set of challenges to the skin photographer because of the restrictions imposed by the equipment being used. This article discusses these challenges in relation to camera sensitivity, lens and filter transmission and lighting spectrum, with the aim of demystifying what is actually being captured when imaging skin.
- METHODS : In addition to a discussion of existing data on the subject of camera sensor sensitivity, filter transmission and flash spectral analysis, transmission in the UV of a variety of camera lenses using a new method has been carried out.
- RESULTS : Using the described approach, lens transmission between 280 and 420 nm of a range of lenses has been measured. Combining this with camera sensor sensitivity data and filter and light source characteristics, it has been possible to determine an overall, harmonized, spectral sensitivity curve for what is being imaged with a given setup.
- CONCLUSIONS : UV reflectance photography, while a powerful tool, is often misunderstood and misreported as to what is actually being imaged. By combining measurements on camera sensitivity, lens and filter transmission and light source spectra the researcher can more fully understand what is they are actually measuring, thereby enabling better communication with the consumer on what they are seeing and a more complete description for any claims support. |
| Note de contenu : |
- Factors to consider during equipment choice
- Lens transmission
- Filter transmission
- Light source
- Bringing it all together - harmonization
- Image format - Jpg or RAW |
| DOI : |
https://doi.org/10.1111/ics.12591 |
| En ligne : |
https://drive.google.com/file/d/1-Sxdj2iTELmUu06pUCCO0M7_1ZJjpK-F/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=34504 |
in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE > Vol. 42, N° 2 (04/2020) . - p. 136-145
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UV reflectance photography of skin : what are you imaging ? in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 42, N° 2 (04/2020)
