High-speed imaging system and motion estimation methods applied to the control of mineral fertilizer spreading

F. Cointault

doi:10.1117/12.516727

1 August 2003 High-speed imaging system and motion estimation methods applied to the control of mineral fertilizer spreading

F. Cointault

Author Affiliations +

Proceedings Volume 4948, 25th International Congress on High-Speed Photography and Photonics; (2003) https://doi.org/10.1117/12.516727
Event: 25th international Congress on High-Speed photography and Photonics, 2002, Beaune, France

Abstract

Although mechanically simple, centrifugal spreaders used for mineral fertilization involve complex physics that cannot be fully characterized at the present time. To avoid fertilizer misadjustments in the field, centrifugal spreading, and especially the initial conditions of flight of the granules, have to be accurately understood. The work described in this paper led to the conception of a high speed images collection system for characterizing the centrifugal spreading in a laboratory. This patented multiexposure system allows to determine granule trajectories after their ejection, with the use of a high resolution low cost digital camera, combined with a set of flashes, and different motion estimation methods. The Markov Random Fields (MRFs) method gives very accurate and better results in comparison with intercorrelation or theoretical modeling of the granule throws methods. This establishment allows to use the results in ballistic model to predict the fertilizer repartition on the ground. A fourth motion estimation method based on Gabor filters is moreover currently investigated.

Citation Download Citation

F. Cointault "High-speed imaging system and motion estimation methods applied to the control of mineral fertilizer spreading", Proc. SPIE 4948, 25th International Congress on High-Speed Photography and Photonics, (1 August 2003); https://doi.org/10.1117/12.516727

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Motion estimation

Motion models

Imaging systems

Particles

Minerals

Cameras

Control systems

Show All Keywords

Keywords/Phrases

Search In:

Publication Years