Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Using YOLO Object Detection to Identify Hare and Roe Deer in Thermal Aerial Video Footage—Possible Future Applications in Real-Time Automatic Drone Surveillance and Wildlife Monitoring

Version 1 : Received: 24 November 2023 / Approved: 24 November 2023 / Online: 27 November 2023 (11:17:09 CET)

A peer-reviewed article of this Preprint also exists.

Povlsen, P.; Bruhn, D.; Durdevic, P.; Arroyo, D.O.; Pertoldi, C. Using YOLO Object Detection to Identify Hare and Roe Deer in Thermal Aerial Video Footage—Possible Future Applications in Real-Time Automatic Drone Surveillance and Wildlife Monitoring. Drones 2024, 8, 2. Povlsen, P.; Bruhn, D.; Durdevic, P.; Arroyo, D.O.; Pertoldi, C. Using YOLO Object Detection to Identify Hare and Roe Deer in Thermal Aerial Video Footage—Possible Future Applications in Real-Time Automatic Drone Surveillance and Wildlife Monitoring. Drones 2024, 8, 2.

Abstract

Wildlife monitoring can be time-consuming and expensive, but the fast-developing technologies of uncrewed aerial vehicles, sensors, and machine learning pave the way for automated monitoring. In this study we trained YOLOv5 neural networks to detect Points of Interest, hare (Lepus europaeus), and roe deer (Capreolus capreolus) in thermal aerial footage and proposed a method to manually assess the parameter mean average precision (mAP), compared to the number of actual false positive and false negative detections in a subsample. This showed that a mAP close to 1 for a trained model does not necessarily mean perfect detection and provided a method to gain insights into the parameters affecting the trained models' precision. Furthermore, we provided a basic, conceptual algorithm for implementing real-time object detection in uncrewed aircraft systems equipped with thermal sensors, with high zoom capabilities, and a laser rangefinder. Real-time object detection is becoming an invaluable complementary tool for the monitoring of cryptic and nocturnal animals with the use of thermal sensors.

Keywords

Wildlife monitoring; uncrewed aerial systems; UAV; UAS; RPAS; aerial survey; thermal imagery; YOLOv5; neural network training; Capreolus capreolus; Lepus europaeus

Subject

Biology and Life Sciences, Ecology, Evolution, Behavior and Systematics

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