Multispectral measurement of scattering-angular light distribution in apple skin and flesh samples
TypeArticles dans des revues avec comité de lecture
Knowledge of the optical properties of apple tissues such as skin and flesh is essential to better understand the light–tissue interaction process and to apply optical methods for apple quality inspection. This work aimed at estimating the anisotropy factor of thin skin and flesh samples extracted from three apple cultivars. The scatter-ing-angular light distribution in each tissue sample was measured at four wavelengths (λ 633, 763, 784, and 852 nm), by means of a goniometer setup. Based on the recorded angular intensity I θ;λ , the effective anisotropy factor geff of each tissue type was first estimated using the mean statistics applied to the random variable cos θ. Next, the measured data were fitted with three predefined and modified phase functions—Henyey-Greenstein (pMHG), Gegenbauer kernel (pMGK), and Mie (pMie)—in order to retrieve the corresponding anisotropy factors gMHG, gMGK, and gM Mie. Typically, the anisotropy factors of skin and flesh amount to 0.6–0.8 in the abovementioned wavelength range.
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
Assessment of tissue optical parameters in a spherical geometry using three different optical spectroscopy methods: comparison based on a theoretical approach VAUDELLE, Fabrice; ASKOURA, Mohamed Lamine; L'HUILLIER, Jean-Pierre (The Society of Photo-Optical Instrumentation Engineers (SPIE), 2015)The non-invasive research of information inside the biological tissues can be made by means of continuous, time dependent or frequency modulated light source, emitting in the visible or infrared range. Moreover, the ...
Use of steady-state imaging setup for assessing the internal optical properties of non-spherical apple samples ASKOURA, Mohamed Lamine; VAUDELLE, Fabrice; L'HUILLIER, Jean-Pierre (Elsevier BV, 2019)The aim of this paper was to retrieve the absorption (µa) and reduced scattering (µ's) coefficients of whole apples which exhibit a complex shape. The effect of the local boundary curvature on the retrieved optical properties ...
Light source distribution and scattering phase function influence light transport in diffuse multi-layered media VAUDELLE, Fabrice; L’HUILLIER, Jean-Pierre; ASKOURA, Mohamed Lamine (Elsevier BV, 2017)Red and near-Infrared light is often used as a useful diagnostic and imaging probe for highly scattering media such as biological tissues, fruits and vegetables. Part of diﬀusively reﬂected light gives interesting information ...
ASKOURA, Mohamed Lamine; VAUDELLE, Fabrice; L’HUILLIER, Jean-Pierre (MDPI AG, 2015)This paper reports on the quantiﬁcation of light transport in apple models using Monte Carlo simulations. To this end, apple was modeled as a two-layer spherical model including skin and ﬂesh bulk tissues. The optical ...
ASKOURA, Mohamed Lamine; VAUDELLE, Fabrice; L’HUILLIER, Jean-Pierre (MDPI AG, 2016)This work aimed at high lighting the role played by the skin in the light propagation through the apple ﬂesh. A multispectral Visible-Near Infrared (Vis-NIR) steady-state imaging setup based on the use of four continuous ...