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Sensors 2015, 15(8), 20845-20862; doi:10.3390/s150820845

Distance-Dependent Multimodal Image Registration for Agriculture Tasks

Department of Industrial Engineering and Management, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, Ljubljana 1000, Slovenia
Department of Computer Science, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 1 May 2015 / Revised: 11 August 2015 / Accepted: 11 August 2015 / Published: 21 August 2015
(This article belongs to the Section Physical Sensors)
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Image registration is the process of aligning two or more images of the same scene taken at different times; from different viewpoints; and/or by different sensors. This research focuses on developing a practical method for automatic image registration for agricultural systems that use multimodal sensory systems and operate in natural environments. While not limited to any particular modalities; here we focus on systems with visual and thermal sensory inputs. Our approach is based on pre-calibrating a distance-dependent transformation matrix (DDTM) between the sensors; and representing it in a compact way by regressing the distance-dependent coefficients as distance-dependent functions. The DDTM is measured by calculating a projective transformation matrix for varying distances between the sensors and possible targets. To do so we designed a unique experimental setup including unique Artificial Control Points (ACPs) and their detection algorithms for the two sensors. We demonstrate the utility of our approach using different experiments and evaluation criteria. View Full-Text
Keywords: sensor registration; control points; artificial control points; sensor fusion sensor registration; control points; artificial control points; sensor fusion

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Berenstein, R.; Hočevar, M.; Godeša, T.; Edan, Y.; Ben-Shahar, O. Distance-Dependent Multimodal Image Registration for Agriculture Tasks. Sensors 2015, 15, 20845-20862.

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