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Abstract
Machine vision evolved considerably in the last decade. The positive price evolution and robustness of the cameras combined with the high accuracy have led to their widespread use in different agricultural sectors. Our consortium presented different image based methods to measure the speed and direction of fertiliser grains. Currently, a first attempt to extract 3D-information with an image acquisition system based on stereoscopy is presented. The system uses previously developed and tested 2-D techniques. Depending on the imposed vertical angle, the first stereovision system showed an average error between 0,1% and 2,2% for measuring distance and height difference between grains. The second set-up showed promising results when comparing the measured values to the imposed velocity. Preliminary tests indicated that the designed stereovision system is capable of performing high speed 3D measurements on grains. More tests and research are necessary to further develop this first approach to a useful tool for spreading.
Keywords
stereovision, centrifugal spreaders

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Please use this url to cite or link to this publication:

MLA
Hijazi, Bilal et al. “A 3-D Stereovision System for Fertilizer Granule Characterization.” Agricultural Engineering, International Conference, Abstracts. Montpellier, France: Cemagref, 2010. Print.
APA
Hijazi, B., Cointault, F., Vangeyte, J., Dubois, J., Paindavoine, M., & Pieters, J. (2010). A 3-D stereovision system for fertilizer granule characterization. Agricultural Engineering, International conference, Abstracts. Presented at the 2010 International conference on Agricultural Engineering (AgEng 2010), Montpellier, France: Cemagref.
Chicago author-date
Hijazi, Bilal, Frédéric Cointault, Jürgen Vangeyte, Julien Dubois, Michel Paindavoine, and Jan Pieters. 2010. “A 3-D Stereovision System for Fertilizer Granule Characterization.” In Agricultural Engineering, International Conference, Abstracts. Montpellier, France: Cemagref.
Chicago author-date (all authors)
Hijazi, Bilal, Frédéric Cointault, Jürgen Vangeyte, Julien Dubois, Michel Paindavoine, and Jan Pieters. 2010. “A 3-D Stereovision System for Fertilizer Granule Characterization.” In Agricultural Engineering, International Conference, Abstracts. Montpellier, France: Cemagref.
Vancouver
1.
Hijazi B, Cointault F, Vangeyte J, Dubois J, Paindavoine M, Pieters J. A 3-D stereovision system for fertilizer granule characterization. Agricultural Engineering, International conference, Abstracts. Montpellier, France: Cemagref; 2010.
IEEE
[1]
B. Hijazi, F. Cointault, J. Vangeyte, J. Dubois, M. Paindavoine, and J. Pieters, “A 3-D stereovision system for fertilizer granule characterization,” in Agricultural Engineering, International conference, Abstracts, Clermont-Ferrand, France, 2010.
@inproceedings{1174398,
  abstract     = {{Machine vision evolved considerably in the last decade. The positive price evolution and robustness of the cameras combined with the high accuracy have led to their widespread use in different agricultural sectors. Our consortium presented different image based methods to measure the speed and direction of fertiliser grains. Currently, a first attempt to extract 3D-information with an image acquisition system based on stereoscopy is presented. The system uses previously developed and tested 2-D techniques. Depending on the imposed vertical angle, the first stereovision system showed an average error between 0,1% and 2,2% for measuring distance and height difference between grains. The second set-up showed promising results when comparing the measured values to the imposed velocity. Preliminary tests indicated that the designed stereovision system is capable of performing high speed 3D measurements on grains. More tests and research are necessary to further develop this first approach to a useful tool for spreading.}},
  author       = {{Hijazi, Bilal and Cointault, Frédéric and Vangeyte, Jürgen and Dubois, Julien and Paindavoine, Michel and Pieters, Jan}},
  booktitle    = {{Agricultural Engineering, International conference, Abstracts}},
  keywords     = {{stereovision,centrifugal spreaders}},
  language     = {{eng}},
  location     = {{Clermont-Ferrand, France}},
  publisher    = {{Cemagref}},
  title        = {{A 3-D stereovision system for fertilizer granule characterization}},
  year         = {{2010}},
}