Publications des scientifiques de l'IRD

Mannocci L., Villon S., Chaumont M., Guellati N., Mouquet N., Iovan Corina, Vigliola Laurent, Mouillot D. (2021). Leveraging social media and deep learning to detect rare megafauna in video surveys. Conservation Biology, [Early access], p. [11 p.]. ISSN 0888-8892.

Titre du document
Leveraging social media and deep learning to detect rare megafauna in video surveys
Année de publication
2021
Type de document
Article référencé dans le Web of Science WOS:000681599900001
Auteurs
Mannocci L., Villon S., Chaumont M., Guellati N., Mouquet N., Iovan Corina, Vigliola Laurent, Mouillot D.
Source
Conservation Biology, 2021, [Early access], p. [11 p.] ISSN 0888-8892
Deep learning has become a key tool for the automated monitoring of animal populations with video surveys. However, obtaining large numbers of images to train such models is a major challenge for rare and elusive species because field video surveys provide few sightings. We designed a method that takes advantage of videos accumulated on social media for training deep-learning models to detect rare megafauna species in the field. We trained convolutional neural networks (CNNs) with social media images and tested them on images collected from field surveys. We applied our method to aerial video surveys of dugongs (Dugong dugon) in New Caledonia (southwestern Pacific). CNNs trained with 1303 social media images yielded 25% false positives and 38% false negatives when tested on independent field video surveys. Incorporating a small number of images from New Caledonia (equivalent to 12% of social media images) in the training data set resulted in a nearly 50% decrease in false negatives. Our results highlight how and the extent to which images collected on social media can offer a solid basis for training deep-learning models for rare megafauna detection and that the incorporation of a few images from the study site further boosts detection accuracy. Our method provides a new generation of deep-learning models that can be used to rapidly and accurately process field video surveys for the monitoring of rare megafauna.
Plan de classement
Limnologie biologique / Océanographie biologique [034] ; Informatique [122]
Description Géographique
NOUVELLE CALEDONIE
Localisation
Fonds IRD [F B010082629]
Identifiant IRD
fdi:010082629
Contact
  • Coordonnées :
    IST / IRD Ile-de-France
    32 avenue Henri Varagnat
    93140 Bondy Cedex
    France
    Horizon Pleins textes
  •