Journal ArticleDOI
Determining the optical properties of turbid media by using the adding–doubling method
TLDR
A method is described for finding the optical properties of a slab of turbid material by using total reflection, unscattered transmission, and total transmission measurements and the intrinsic error in the method is < 3% when four quadrature points are used.Abstract:
A method is described for finding the optical properties (scattering, absorption, and scattering anisotropy) of a slab of turbid material by using total reflection, unscattered transmission, and total transmission measurements. This method is applicable to homogeneous turbid slabs with any optical thickness, albedo, or phase function. The slab may have a different index of refraction from its surroundings and may or may not be bounded by glass. The optical properties are obtained by iterating an adding–doubling solution of the radiative transport equation until the calculated values of the reflection and transmission match the measured ones. Exhaustive numerical tests show that the intrinsic error in the method is <3% when four quadrature points are used.read more
Citations
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Intrinsic, widefield optical imaging of hemodynamics in rodent models of Alzheimer’s disease and neurological injury
TL;DR: In this article , the authors discuss the principles and applications of three widefield optical imaging approaches that can measure cerebral hemodynamics: (1) optical intrinsic signal imaging, (2) laser speckle imaging, and (3) spatial frequency domain imaging.
Proceedings ArticleDOI
Optical Spectroscopic Properties of Brown Fat Reveal Pathophysiological Conditions
Lianyu Guo,Wanzhu Jin,Le Qiu,Vladimir Turzhitsky,Edward Vitkin,Eugene B. Hanlon,Irving Itzkan,Lev T. Perelman +7 more
TL;DR: In this paper, a doubleintegrating-sphere system was used to measure the absorption and scattering coefficients of brown and white fat in mice, and the optical spectroscopic properties of the fat tissue were sensitive to the pathophysiological conditions of mice.
Proceedings ArticleDOI
Optical property change of blood on an optical window boundary by 660-nm band laser irradiation
TL;DR: In this paper, an optical interaction on an optical window and blood boundary during the CW laser irradiation in 660 nm============band until blood charring occurrence was studied, where the blood model sandwiched between two glass slides to simulate the interface between blood and the optical window was used.
Journal ArticleDOI
Rapid extraction of skin physiological parameters from hyperspectral images using machine learning
TL;DR: In this paper , a stacked dynamic weighting (SDW) model was introduced to combine the predictions of all three individually trained models, and the SDW model was trained by using only a handful of real-world spectra on top of the ANN, CNN and RF models that were trained using simulated data.
A concise review on color match prediction models
TL;DR: In this paper, the authors proposed a new approach to improve the quality of the data collected by the data collection system, which is referred to as the data augmentation system (CIS).
References
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Journal ArticleDOI
A simplex method for function minimization
John A. Nelder,R. Mead +1 more
TL;DR: A method is described for the minimization of a function of n variables, which depends on the comparison of function values at the (n 41) vertices of a general simplex, followed by the replacement of the vertex with the highest value by another point.
Book
Introduction to Numerical Analysis
Josef Stoer,Roland Bulirsch +1 more
TL;DR: This well written book is enlarged by the following topics: B-splines and their computation, elimination methods for large sparse systems of linear equations, Lanczos algorithm for eigenvalue problems, implicit shift techniques for theLR and QR algorithm, implicit differential equations, differential algebraic systems, new methods for stiff differential equations and preconditioning techniques.
Journal ArticleDOI
A review of the optical properties of biological tissues
TL;DR: The known optical properties (absorption, scattering, total attenuation, effective attenuation and/or anisotropy coefficients) of various biological tissues at a variety of wavelengths are reviewed in this article.
Journal ArticleDOI
New contributions to the optics of intensely light-scattering materials.
TL;DR: In this paper, the Gurevic and Judd formulas were derived from the Kubelka-Munk differential equations, and they are exact under the same conditions as in this paper, that is, when the material is perfectly dull and when the light, is perfectly diffused or if it is parallel and hits the specimen under an angle of 60° from normal.