It is a common practice to prepare tint ladders of each colorant consisting of five or more concentrations in order to develop a colorant database for instrumental-based color matching, characterization of optical properties of a coloration system, and pigment mapping. For two-constant Kubelka-Munk theory, the unit absorption and scattering coefficients for each colorant can be solved by the li...

A new spectral colour prediction model for a fluorescent ink printed on paper is presented. It is based on our previous work on transparent support4 and on a new mathematical formalism which generalizes the Kubelka-Munk theory. The printed paper is modelized by means of three matrices: an interface correction matrix, a matrix exponential modelizing the layer which contains the fluorescent ink, ...

In vivo quantitative assessment of skin lesions is an important step in the evaluation of skin condition. An objective measurement device can help as a valuable tool for skin analysis. We propose an explorative new multispectral camera specifically developed for dermatology/cosmetology applications. The multispectral imaging system provides images of skin reflectance at different wavebands cove...

The colour of colon tissue, which depends on the tissue structure, its optical properties, and the quantities of the pigments present in it, can be predicted by a physics-based model of colouration. The model, created by analysing light interaction with the tissue, is aimed at correlating the histology of the colon and its colours. This could be of a great diagnostic value, as the development o...

This paper combines and extends two optical models based on a two-collimated-flux approach that we previously proposed for the reflectance and transmittance of nonscattering elements, i.e., stacked nonscattering plastic films on the one hand, and films printed in halftone on the other hand. Those two models are revisited and combined by introducing different reflectances and transmittances on t...

Single crystals of 8-hydroxy-5-nitroquinolinium p-toluene sulfonate (HNT) were grown by the slow evaporation solution growth technique. The structure was elucidated single-crystal X-ray diffraction analysis, and crystal belongs to monoclinic system with space group C2/c. crystallinity HNT studied powder analysis. presence functional groups determined FT-IR spectral band gap energy is estimated ...

Hematite concentration is an important climatic proxy for environmental (climatic) studies of soils and sediments. However, the accurate quantification naturally occurring hematite has always been a difficult question, especially those areas with lower concentrations. Diffuse reflectance spectroscopy (DRS) effective method identification detection limits. In this study, we synthesized set sampl...

The worldwide increase in generation of solar based electricity prompts the essentiality research efforts on development energy storage systems. In this regard, self-powered photocapacitors are keen interest as they can directly convert and store form electrical a single device. This study reports photoelectrochemical capacity novel photocapacitor fabricated with FTO/Activated Carbon (AC)/Ag2Cr...

Abstract Measuring the temperature below surface of a thermal barrier coating (TBC) using thin phosphor layer is challenging primarily due to absorption and scattering laser excitation light luminescence as they propagate through coating. One way increase could be use upconversion thermometry, which investigated in current study. It attractive because longer wavelengths reduces TBCs 8 % wt. Ytt...

The increasing prevalence of vascular diseases encourages the development minimally invasive approaches to assess tissue perfusion. A significant challenge facing current state-of-the-art methods is their validation against clinical data. In this study, we introduce an open-source database designed evaluate perfusion during application occlusion protocol. comprises sequences multi-spectral imag...