The distribution of laser light in the tissue of Golden Delicious and Idared apples was measured with backscattering imaging and simulated with Monte Carlo (MC) method. The settings of the vision system (sensitivity and resolution) and the parameters of the laser modules (wavelength, power and beam diameter) were used in a time resolved MC model to optimize the computation. The 1 ns pulse containing 1.42 × 10
(at 670 nm) and 2.49 × 10
(at 785 nm) photons was selected for the simulation of backscattering on the fruit surface. The statistical effect of the scattering coefficient (µ
), absorption coefficient (μ
), and anisotropy factor (
) on photon flux and shape of the backscattering profile was evaluated within ±20 % range relative to expected mean values for apple tissue (µ
= 0.63 cm
= 30.0 cm
= 0.8). The multi-factor ANOVA test pointed out the highest importance (p<0.001) of the anisotropy factor compared to the scattering and absorption coefficients. Decreasing value of anisotropy factor enhanced the maximum intensity and increased the decline of the gradient resulting in a rotation of the intensity profiles. The measured backscattering profiles for Golden Delicious apples responded to bruising (p<0.05) already after one day storage.
Binzoni, T., Leung, T.S., Giust, R., Rüfenacht, D., Gandjbakhche, A.H. (2008) Light transport in tissue by 3D Monte Carlo: Influence of boundary voxelization.
Computer Methods and Programs in Biomedicine
, 89: 14–23
Gandjbakhche A.H., 'Light transport in tissue by 3D Monte Carlo: Influence of boundary voxelization' (2008) 89Computer Methods and Programs in Biomedicine: 14-23.
Gandjbakhche A.H.Light transport in tissue by 3D Monte Carlo: Influence of boundary voxelizationComputer Methods and Programs in Biomedicine2008891423)| false
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Sempau J.PENELOPE. A code system for Monte Carlo simulation of electron and photon transport2001)| false
Scot, V., Fernandez, J.E., Vincze, L., Janssens, K. (2007) 3D extension of the Monte Carlo code MCSHAPE for photon-matter interactions in heterogeneous media.
Nuclear Instruments and Methods in Physics Research B
, 263: 204–208
Janssens K., '3D extension of the Monte Carlo code MCSHAPE for photon-matter interactions in heterogeneous media' (2007) 263Nuclear Instruments and Methods in Physics Research B: 204-208.
Janssens K.3D extension of the Monte Carlo code MCSHAPE for photon-matter interactions in heterogeneous mediaNuclear Instruments and Methods in Physics Research B2007263204208)| false
Zude, M., Spinelli, L., Torricelli, A. (2008) Approach for non-destructive pigment analysis in model liquids and carrots by means of time-of-flight and multi-wavelength remittance readings.
Analytica Chimica Acta
, 623: 204–212
Torricelli A., 'Approach for non-destructive pigment analysis in model liquids and carrots by means of time-of-flight and multi-wavelength remittance readings' (2008) 623Analytica Chimica Acta: 204-212.
Torricelli A.Approach for non-destructive pigment analysis in model liquids and carrots by means of time-of-flight and multi-wavelength remittance readingsAnalytica Chimica Acta2008623204212)| false
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Progress in Agricultural Engineering Sciences
2021 Volume 17
Magyar Tudományos Akadémia
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