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Title: A 3D contour based geometrical model generator for complex-shaped horticultural products
Authors: Rogge, Seppe
Defraeye, Thijs
Herremans, Els
Verboven, Pieter
Nicolai, Bart # ×
Issue Date: 14-Feb-2015
Publisher: Applied Science Publishers
Series Title: Journal of Food Engineering vol:157 pages:24-32
Abstract: A novel geometric model generator for horticultural products is presented, which generates 3D models of
fruits using shape description techniques based on shapes obtained experimentally from a measured
dataset of fruits by non-destructive X-ray CT imaging. For this purpose, the 3D contour of each fruit in
the scanned dataset was represented with a 2D shape signature, obtained after applying the spherical
coordinate transformation. After normalisation, these signatures were described with 2D Fourier descriptors.
Statistical analysis of these descriptors for all scanned fruits allowed automatic generation of new
geometric fruit models, representative of the measured dataset. The accuracy of the generator was
validated by means of the distributions of volumes and surface area to volume ratios of fruit scans and
the newly generated shapes. This 3D shape description and generation method allows to process the
entire 3D contour of the observed objects and can be applied to all star-shaped objects (shapes that do
not curve back on themselves with respect to the centre of mass). This way, more accurate geometrical
models can be produced compared to similar model generators based on shape description using 2D
cross-sections. This generator enables fast generation of geometrical models to be used in numerical
simulations of heat or mass transport phenomena within horticultural products or their exchange processes
with the surrounding environment.
ISSN: 0260-8774
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
× corresponding author
# (joint) last author

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