Journal article

The use of image analysis to determine the number and position of cattle at a water point

MA Benvenutti, TW Coates, A Imaz, TK Flesch, J Hill, E Charmley, G Hepworth, D Chen

Computers and Electronics in Agriculture | ELSEVIER SCI LTD | Published : 2015

Abstract

This study assessed the application of an image analysis method to accurately determine the number and position of cattle which are critical inputs for enteric methane emission calculations using micrometeorological methods. Animal imagery was collected with three synchronised time-lapse cameras located at 7, 35 and 77m from a 20×30m water point enclosure containing 20 steers, recorded over three consecutive days. Four independent observers counted the number of animals visible in each of 516 images. The counting error increased with distance from the enclosure (0.1%, 3.7% and 15.4% of total animals) as a result of increased overlapping and decreased clarity of the animals on the image. Anim..

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Grants

Funding Acknowledgements

This work was funded by CSIRO through the Livestock Methane Research Cluster. The authors wish to acknowledge Wayne Flintham, Steve Austin, Kevin Barrett and Thomas Stevens for helping with maintenance of equipment and the observers for the image analysis.