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Open AccessArticle

High Speed Stereovision Setup for Position and Motion Estimation of Fertilizer Particles Leaving a Centrifugal Spreader

Institute of Agricultural and Fisheries Research, Burg. van Gansberghelaan 115, Merelbeke 9820, Belgium
Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, boulevard du Docteur Petitjean 26, Dijon 21079, France
Laboratoire d'Etude de l'Apprentissage et du Developpement, University of Burgundy, Esplanade Erasme 11, Dijon 21000, France
Department of Biosystems Engineering, Ghent University, Coupure links 653, Gent 9000, Belgium
Author to whom correspondence should be addressed.
Sensors 2014, 14(11), 21466-21482;
Received: 22 September 2014 / Revised: 28 October 2014 / Accepted: 31 October 2014 / Published: 13 November 2014
(This article belongs to the Special Issue Agriculture and Forestry: Sensors, Technologies and Procedures)
A 3D imaging technique using a high speed binocular stereovision system was developed in combination with corresponding image processing algorithms for accurate determination of the parameters of particles leaving the spinning disks of centrifugal fertilizer spreaders. Validation of the stereo-matching algorithm using a virtual 3D stereovision simulator indicated an error of less than 2 pixels for 90% of the particles. The setup was validated using the cylindrical spread pattern of an experimental spreader. A 2D correlation coefficient of 90% and a Relative Error of 27% was found between the experimental results and the (simulated) spread pattern obtained with the developed setup. In combination with a ballistic flight model, the developed image acquisition and processing algorithms can enable fast determination and evaluation of the spread pattern which can be used as a tool for spreader design and precise machine calibration. View Full-Text
Keywords: stereovision; motion estimation; fertilizer; centrifugal spreader stereovision; motion estimation; fertilizer; centrifugal spreader
MDPI and ACS Style

Hijazi, B.; Cool, S.; Vangeyte, J.; Mertens, K.C.; Cointault, F.; Paindavoine, M.; Pieters, J.G. High Speed Stereovision Setup for Position and Motion Estimation of Fertilizer Particles Leaving a Centrifugal Spreader. Sensors 2014, 14, 21466-21482.

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