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arXiv 2004.027582020-04cs.CVcs.LGeess.IVstat.ML

Towards Detection of Sheep Onboard a UAV

Engineering Research Institute（工程研究所）；High Perf. Comp. Research Lab.（高性能计算实验室）；Auckland University of Technology（奥克兰理工大学）

Farah Sarwar, Anthony Griffin, Saeed Ur Rehman, Timotius Pasang

备注：: This was accepted for publication and presentation at the Embedded AI for Real-time Machine Vision 2019 in conjunction with the British Machine Vision Conference (BMVC) 2019. It was presented on 12 September 2019 in Cardiff, Wales. 10 pages, 3 figures, and 1 table, note that this is a web-friendly format as used at BMVC, so the pages are about A5 size (but not exactly!)

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In this work we consider the task of detecting sheep onboard an unmanned aerial vehicle (UAV) flying at an altitude of 80 m. At this height, the sheep are relatively small, only about 15 pixels across. Although deep learning strategies have gained enormous popularity in the last decade and are now extensively used for object detection in many fields, state-of-the-art detectors perform poorly in the case of smaller objects. We develop a novel dataset of UAV imagery of sheep and consider a variety of object detectors to determine which is the most suitable for our task in terms of both accuracy and speed. Our findings indicate that a UNet detector using the weighted Hausdorff distance as a loss function during training is an excellent option for detection of sheep onboard a UAV.

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