A sequential method for estimating the optical properties of two-layer agro-products from spatially-resolved diffuse reflectance: Simulation
Aichen Wang,Xinhua Wei +1 more
- Vol. 3, pp 69-78
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TLDR
In this paper, a sequential method for estimating the optical properties of two-layer biological tissues with spatially-resolved diffuse reflectance was proposed and validated using Monte Carlo simulations, and the relationship between the penetration depth of detected photons and source-detector separation was first studied.Abstract:
A sequential method for estimating the optical properties of two-layer biological tissues with spatially-resolved diffuse reflectance was proposed and validated using Monte Carlo simulations. The relationship between the penetration depth of detected photons and source-detector separation was first studied. Photons detected at larger source-detector separations generally penetrated deeper into the medium than those detected at small source-detector separations. The effect of each parameter involved in the two-layer diffusion model (i.e., the absorption and reduced scattering coefficients (μa and μs′) of each layer, and the thickness of top layer) on reflectance was investigated. It was found that the relationship between the optical properties and thickness of top layer was a critical factor in determining whether photons would have sufficient interactions with the top layer and also penetrate into the bottom layer. The constraints for the proposed sequential estimation method were quantitatively determined by the curve fitting procedure coupled with error contour map analyses. Results showed that the optical properties of top layer could be determined within 10% error using the semi-infinite diffusion model for reflectance profiles with properly selected start and end points, when the thickness of top layer was larger than two times its mean free path (mfp′). And the optical properties of the bottom layer could be estimated within 10% error by the two-layer diffusion model, when the thickness of top layer wasread more
Citations
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Assessment of Tomato Maturity in Different Layers by Spatially Resolved Spectroscopy.
TL;DR: It is demonstrated that spatially resolved spectroscopy has potential for assessing tomato maturity in different layers and even if in the same source-detector distances, the classification results were influenced by the measurement location due to the heterogeneity for tomato.
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Numerical Simulation on Spatial-Frequency Domain Imaging for Estimating Optical Absorption and Scattering Properties of Two-Layered Horticultural Products
TL;DR: In this paper, the effect of varying optical properties on reflectance prediction was first simulated, which indicated that there is good separation in diffuse reflectance over a large range of spatial frequencies for different reduced scattering values in the top layer, whereas there is less separation in the bottom layer.
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A Method for Obtaining Optical Properties of Two-Layer Tissue such as Thin-Skinned Fruits by Using Spatial Frequency Domain Imaging
TL;DR: In this article , a two-layer model was proposed by optimizing the reflectivity of the flesh layer through the optical properties and thickness of the skin layer, which can be further used for nondestructive fruit quality evaluations.
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Optical parameters inversion of tissue using spatially resolved diffuse reflection imaging combined with LSTM-attention network
TL;DR: In this article , a novel data-driven model based on a long short-term memory network and attention mechanism (LSTM-attention network) combined with spatially resolved diffuse reflectance (SRDR) is proposed for the accurate estimation of the optical properties of turbid media.
References
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Proceedings ArticleDOI
Accessing deep optical properties of skin using diffuse reflectance spectroscopy
TL;DR: In this paper, a low-cost spatially resolved diffuse reflectance spectroscopy instrument was developed in a laboratory to characterize composition and structure of tissues by determining their scattering and absorption properties.
Proceedings ArticleDOI
Analytical solutions of the radiative transport equation for the reflectance and fluorescence from layered media illuminated by a finite beam
André Liemert,Alwin Kienle +1 more
TL;DR: In this paper, exact and efficient analytical solutions of the three dimensional radiative transport equation in the spatial frequency, the spatial, the temporal frequency, and time domains were derived for two-layered scattering media.
Determination of optical parameters in biological tissues and application to medical imaging
TL;DR: Chen et al. as mentioned in this paper developed a reflectance imaging method to inversely determine the optical and geometric parameters of skin tissues through phantom study, which can provide optical markers for early detection of lesions such as skin cancers.
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