Journal
COMPUTERS AND ELECTRONICS IN AGRICULTURE
Volume 121, Issue -, Pages 200-206Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compag.2015.12.008
Keywords
Fruit tissue; Optical properties; Monte Carlo simulation; Non-destructive inspection
Funding
- Fundamental Research Funds for the Central Universities [2662015BQ046]
- Hubei Provincial Natural Science Foundation of China [2015CFB479]
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The propagation of photons in stone fruit tissue was simulated with the Monte Carlo (MC) method. A model of concentric-spherical-layered tissues was built for intact stone fruit. Peaches were used as typical representatives of stone fruit. Diffuse reflectance and inspection efficiency were calculated using the concentric-spherical-layered model. The simulation results were compared with those expected from the classic infinitely-wide planar layered model. Surface curvature increases the diffuse reflectance but decreases the inspection efficiency, especially for the case of short source-detector distance. For small size fruit items, errors in the planar layered tissues model would be increased due to their greater surface curvature. This paper suggests a need to take into account the influence of surface curvature to retrieve the optical absorption and reduced scattering coefficients from Vis-NIR spectroscopy data for fruit. And the experimental arrangements such as the source-detector distance and the integration time for the spectrometer require adjustment accordingly. (C) 2015 Elsevier B.V. All rights reserved.
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