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Open AccessArticle

An Automatic Head Surface Temperature Extraction Method for Top-View Thermal Image with Individual Broiler

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College of Engineering/Jiangsu Province Engineering Lab for Modern Facility Agriculture Technology & Equipment, Nanjing Agricultural University, Nanjing 210031, China
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Jiangsu Lihua Animal Husbandry CO., LTD., Changzhou 213168, China
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M3-BIORES- Measure, Model & Manage Bioresponses, KU Leuven, Kasteelpark Arenberg 30, B-3001 Leuven, Belgium
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BioRICS nv, Technologielaan 3, 3001 Leuven, Vlaams-Brabant, Belgium
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(23), 5286; https://doi.org/10.3390/s19235286
Received: 20 September 2019 / Revised: 5 November 2019 / Accepted: 27 November 2019 / Published: 30 November 2019
(This article belongs to the Special Issue Smart Sensing Technologies for Agriculture)
Surface temperature variation in a broiler’s head can be used as an indicator of its health status. Surface temperatures in the existing thermograph based animal health assessment studies were mostly obtained manually. 2185 thermal images, each of which had an individual broiler, were captured from 20 broilers. Where 15 broilers served as the experimental group, they were injected with 0.1mL of pasteurella inoculum. The rest, 5 broilers, served as the control group. An algorithm was developed to extract head surface temperature automatically from the top-view broiler thermal image. Adaptive K-means clustering and ellipse fitting were applied to locate the broiler’s head region. The maximum temperature inside the head region was extracted as the head surface temperature. The developed algorithm was tested in Matlab® (R2016a) and the testing results indicated that the head region in 92.77% of the broiler thermal images could be located correctly. The maximum error of the extracted head surface temperatures was not greater than 0.1 °C. Different trend features were observed in the smoothed head surface temperature time series of the broilers in experimental and control groups. Head surface temperature extracted by the presented algorithm lays a foundation for the development of an automatic system for febrile broiler identification. View Full-Text
Keywords: broiler surface temperature extraction; thermal image processing; head region locating; adaptive K-means; ellipse fitting broiler surface temperature extraction; thermal image processing; head region locating; adaptive K-means; ellipse fitting
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Xiong, X.; Lu, M.; Yang, W.; Duan, G.; Yuan, Q.; Shen, M.; Norton, T.; Berckmans, D. An Automatic Head Surface Temperature Extraction Method for Top-View Thermal Image with Individual Broiler. Sensors 2019, 19, 5286.

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