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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BPB2-0033-0012

Czasopismo

Acta Mechanica et Automatica

Tytuł artykułu

3D apple modeling with the use of the structured light method

Autorzy Hryniewicz, M.  Anthonis, J.  Ramon, H. 
Treść / Zawartość
Warianty tytułu
Języki publikacji EN
Abstrakty
EN The geometrical fruit model could affect many physical phenomena, such as heat, mass and moisture transfer, pneumatic transport and mechanical vibrations which occur during handling and processing fruits (Jancsok, 1999). The fruit geometrical model could be further studied by the Finite Element Method (FEM) (Jancsok, 1999). Incidence of bruises is the most important type of postharvest mechanical injury (van Zeebroeck, 2005). The reason for this is that the causes and mechanisms of impact and vibration are complex and interrelated (van Zeebroeck, 2005). In mechanical engineering a geometrical model of the structure to be analyzed is usually available as CAD drawing which can be imported directly in FE software (Jancsok, 1999). However, for agricultural-, bio- and food- materials there are no geometrical models available so they have to be defined manually, which is complicated by the complex shape and the shape variability of these products (Jancsok, 1999). Dintwa (Dintwa, 2006) stated that the 3D simplified models used in the dynamic experiments were not accurate enough, most certainly because of the coarse discretization used with these models. This paper describes a system for complex shapes geometrical modeling. The system was implemented in real apple modeling. It was developed on structured light method elaborated by Sitnik (2002). The method has advantages and disadvantages. Advantages: modeling of complex shapes, recalculation of many points at one moment, at least only 3 views for one figure, measurements without object touching. Disadvantages: problems with light reflection.
Słowa kluczowe
PL modelowanie 3D   metoda elementów skończonych  
EN 3D modeling   finite element method  
Wydawca Oficyna Wydawnicza Politechniki Białostockiej
Czasopismo Acta Mechanica et Automatica
Rocznik 2008
Tom Vol. 2, no. 3
Strony 36--41
Opis fizyczny Bibliogr. 13 poz., il., rys.
Twórcy
autor Hryniewicz, M.
autor Anthonis, J.
autor Ramon, H.
  • Institute for Building, Mechanization and Electrification of Agriculture, ul. Rakowiecka 32, 02-532 Warszawa, Poland, marek.hryniewicz@wp.pl
Bibliografia
1. Curless B. (2000), Overview of Active Vision Techniques, SIGGRAPH 2000 Conference Los Angeles, Course on3D Photography,
2. Dintwa E. (2006), Development of accurate contact force models for use with Discrete Element Method (DEM) modelling of bulk fruit handling processes, PhD work, Doctoraatsproefschrift Nr. 726 aan de Faculteit Faculteit Bio-ingenieurswetenschappen van de K.U. Leuven.
3. Halioua M., Liu H.-Ch. (1986), Optical sensing techniques for 3D machine vision, Proc. SPIE 665, p. 150-161.
4. Jancsok P. (1999), Geometrical model generation for Finite Element Meshes of biological products based on digital image processing, PhD work, Doctoraatsproefschrift Nr. 413 aan de Faculteit Faculteit Landbouwkundige en Togepaste Biologishe Wetenschappen van de K.U. Leuven.
5. Klette R., Schluns K., Kosh A. (1998) Computer Vision Three-Dimensional Data, Image Springer.
6. Kowarschik R., Kühmstedt P., Gerber J., Schreiber W., Notni G. (2000), Adaptive optical three-dimensional measurement with structured light, Opt. Eng., 39, p. 150-158.
7. Osten W., Nadeborn W., Andrae P. (1996), General hierarchical approach in absolute phase measurement, Proc SPIE, 2860.
8. Schwider J., Burow R., Elssner K.E., Grzanna J., Spolaczyk R., Merkel K. (1983), Digital wave-front measuring interferometry: some systematic errors sources, Appl. Opt., 22, p. 3421-3432
9. Seitz S. (1999), An Overview of Passive Vision Techniques, SIGGRAPH 1999 Conference Los Angeles, Course on 3D Photography.
10. Sitnik R. (2002), A fully automatic 3D shape measurement system with data export for engineering and multimedia systems, PhD work, Mechatronics Department of the Warsaw University of Technology.
11. Trucco E., Verro A. (1998), Introductory Techniques for 3-D Computer Vision, Prentice Hall.
12. van Zeebroeck M. (2005), The Discrete Element Method (DEM) to Stimulate Fruit Impact Damage during Transport and Handling, PhD work, Doctoraatsproefschrift Nr. 643 aan de Faculteit Faculteit Bio-ingenieurswetenschappen van de K.U. Leuven.
13. Commission regulation (EC) No 85/2004 of 15 January 2004 laying down the marketing standards for apples.
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