Results 1 to 10 of about 2,520 (253)

Comparison of Hyperspectral Imaging and Fiber-Optic Reflectance Spectroscopy for Reflectance and Transmittance Measurements of Colored Glass

Heritage, 2022
The work presented in this paper is part of a wider research project, which aims at documenting and analyzing stained glass windows by means of hyperspectral imaging.
Agnese Babini, Phil Green, Sony George, Jon Yngve Hardeberg   +3 more
doaj   +4 more sources

Quantitative model for imaging single fiber reflectance spectroscopy

Scientific Reports
Single-fiber reflectance (SFR) spectroscopy enables quantitative retrieval of tissue optical properties from highly localized measurements through a single multimode fiber, but its diagnostic yield can be limited by small sampling volumes and probe ...
Robin van Zutphen, Ton G. van Leeuwen, Xavier Attendu   +2 more
doaj   +2 more sources

A Preliminary Study on the Differentiation of Linseed and Poppy Oil Using Principal Component Analysis Methods Applied to Fiber Optics Reflectance Spectroscopy and Diffuse Reflectance Imaging Spectroscopy

Sensors, 2020
This paper presents results from the examination of a set of experimental samples using fibre optic reflectance spectroscopy (FORS) and diffuse reflectance imaging spectroscopy in the short-wave infrared (SWIR) range, combined with statistical analysis ...
Silvia Rita Amato, Aviva Burnstock, Anne Michelin   +2 more
doaj   +3 more sources

Reflectance Imaging spectroscopy: Fusion of VNIR and SWIR for Cultural Heritage Analysis. [PDF]

, 2023
Reflectance Imaging Spectroscopy, often referred to as hyperspectral imaging, is an imaging technique that enables the simultaneous capture of spatial and spectral information from a scene without physical contact and in a non-invasive manner. These desirable features make it especially well-suited for applications in Cultural Heritage analysis, where ...
Grillini, Federico
openaire   +4 more sources

Diffuse reflectance spectroscopy and RGB-imaging: a comparative study of non-invasive haemoglobin assessment

Scientific Reports
Non-invasive assessment of haemoglobin (Hb) level in blood is a hot spot in the point-of-care biomedical diagnostics. Several optical methods are suggested as a solution, some of them being approved for clinical use.
Boris Yakimov, Kirill Buiankin, Georgy Denisenko, Yuliya Shitova, Andrey Shkoda, Evgeny Shirshin   +5 more
doaj   +3 more sources

About the use of reflectance terminology in imaging spectroscopy [PDF]

, 2005
Analysing databases, field and airborne spectrometer data, modelling studies and publications, a lack of consistency in the use of definitions and terminology of reflectance quantities can be observed. One example is the term `BRDF¿ (bidirectional reflectance distribution function) assigned to significantly differing quantities, ranging from the ...
Schaepman-Strub, G., Schaepman, M.E., Dangel, S., Painter, T., Martonchik, J.   +4 more
openaire   +2 more sources

UV Hyperspectral Imaging as Process Analytical Tool for the Characterization of Oxide Layers and Copper States on Direct Bonded Copper

Sensors, 2021
Hyperspectral imaging and reflectance spectroscopy in the range from 200–380 nm were used to rapidly detect and characterize copper oxidation states and their layer thicknesses on direct bonded copper in a non-destructive way. Single-point UV reflectance
Mohammad Al Ktash, Mona Stefanakis, Tim Englert, Maryam S. L. Drechsel, Jan Stiedl, Simon Green, Timo Jacob, Barbara Boldrini, Edwin Ostertag, Karsten Rebner, Marc Brecht   +10 more
doaj   +1 more source

Acquisition of High Spectral Resolution Diffuse Reflectance Image Cubes (350–2500 nm) from Archaeological Wall Paintings and Other Immovable Heritage Using a Field-Deployable Spatial Scanning Reflectance Spectrometry Hyperspectral System

Sensors, 2022
There is growing interest in bringing non-invasive laboratory-based analytical imaging tools to field sites to study wall paintings in order to collect molecular information on the macroscale.
Roxanne Radpour, John K. Delaney, Ioanna Kakoulli   +2 more
doaj   +1 more source

Efficient Estimation of Reflectance Parameters From Imaging Spectroscopy [PDF]

IEEE Transactions on Image Processing, 2013
In this paper, we address the problem of efficiently recovering reflectance parameters from a single multispectral or hyperspectral image. To do so, we propose a shapelet based estimator that employs shapelets to recover the shading in the image. The optimization setting presented is based upon a three-step process.
Lin Gu 0003, Antonio Robles-Kelly, Jun Zhou 0001   +2 more
openaire   +3 more sources

Accuracy and resolution of THz reflection spectroscopy for medical imaging [PDF]

Physics in Medicine and Biology, 2010
The use of THz radiation as a potential tool for medical imaging is of increasing interest. In this paper three methods of analysis of THz spectroscopic information for diagnosis of tissue pathologies at THz frequencies are presented. The frequency-dependent absorption coefficients, refractive indices and Debye relaxation times of pure water and pure ...
Reid, Caroline B., Pickwell-MacPherson, Emma, Laufer, Jan G., Gibson, Adam P., Hebden, Jeremy C., Wallace, Vincent P.   +5 more
openaire   +4 more sources