Machine Vision Retrofit System for Mechanical Weed Control in Precision Agriculture Applications

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ID: 268050
2018
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Abstract
This paper presents a machine vision retrofit system designed for upgrading used tractors to allow the control of the tillage implements and enable real-time field operation. The retrofit package comprises an acquisition system placed in the cabin, a front-mounted RGB camera sensor, and a rear-mounted Peiseler encoder wheel. The method combines shape analysis and colorimetric k-nearest neighbor (k-NN) clustering for in-field weed discrimination. This low-cost retrofit package can use interchangeable sensors, supplying flexibility of use with different farming implements. Field tests were conducted within lettuce and broccoli crops to develop the image analysis system for the autonomous control of an intra-row hoeing implement. The performance showed by the system in the trials was judged in terms of accuracy and speed. The system was capable of discriminating weed plants from crop with few errors, achieving a fairly high performance, given the severe degree of weed infestation encountered. The actuation time for image processing, currently implemented in MATLAB integrated with the retrofit kit, was about 7 s. The correct detection rate was higher for lettuce (from 69% to 96%) than for broccoli (from 65% to 79%), also considering the negative effect of shadows. To be implementable, the experimental code needs to be optimized to reduce acquisition and processing times. A software utility was developed in Java to reach a processing time of two images per second.
Reference Key
pallottino2018sustainabilitymachine Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Federico Pallottino;Paolo Menesatti;Simone Figorilli;Francesca Antonucci;Roberto Tomasone;Andrea Colantoni;Corrado Costa;Pallottino, Federico;Menesatti, Paolo;Figorilli, Simone;Antonucci, Francesca;Tomasone, Roberto;Colantoni, Andrea;Costa, Corrado;
Journal sustainability
Year 2018
DOI
10.3390/su10072209
URL
https://www.mdpi.com/2071-1050/10/7/2209
Keywords
image analysis computer vision mechanical weeding k-nn open-source

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