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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Journal ArticleDOI
Quantification of the optical properties of two-layer turbid materials using a hyperspectral imaging-based spatially-resolved technique
Haiyan Cen,Renfu Lu +1 more
TL;DR: An inverse algorithm along with the sensitivity coefficient analysis for a two-layer diffusion model was developed for the extraction of optical properties from the spatially-resolved diffuse reflectance data acquired using a hyperspectral imaging system.
Journal ArticleDOI
Optical properties of blueberry flesh and skin and Monte Carlo multi-layered simulation of light interaction with fruit tissues.
TL;DR: In this article, the authors measured the absorption coefficient (μa), reduced scattering coefficient ( μ s ), and scattering anisotropy (g) of blueberry skin and skin in the spectral regions of 500-800 nm and 930-1400 nm using Monte Carlo multi-layered (MCML) simulation.
Book
Light & Skin Interactions: Simulations for Computer Graphics Applications
TL;DR: The fundamental biophysical processes that affect skin appearance are illuminated, and seminal related works aimed at applications in life and health sciences are reviewed, as well as definitive algorithms that can be used to generate realistic images depicting skin appearance.
Journal ArticleDOI
Characterization of spatial and temporal variations in the optical properties of tissuelike media with diffuse reflectance imaging.
TL;DR: It is found that this analytical expression for R holds with good approximation even if the investigated medium presents curved or irregular surfaces, and it is possible to translate spatial or temporal changes in the relative diffuse reflectance from a turbid medium into quantitative estimates of the corresponding changes of mu(a)/mu(s)')(1/2).
Journal ArticleDOI
Characterisation of a phantom for multiwavelength quantitative photoacoustic imaging.
TL;DR: PVCP's acoustic properties were assessed for various formulations, as well as its intrinsic optical absorption, and scattering with added TiO2, over a range of wavelengths from 400-2000 nm, by characterising its multiwavelength optical properties, broadband acoustic properties and thermoelastic behaviour.
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.