Adapting the re-ID challenge for static sensors
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Abstract (arXiv)
In both 2016 and 2018, a census of the highly-endangered Grevy's zebra population was enabled by the Great Grevy's Rally (GGR), a citizen science event that produces population estimates via expert and algorithmic curation of volunteer-captured images. A complementary, scalable, and long-term Grevy's population monitoring approach involves deploying camera trap networks. However, in both scenarios, a substantial majority of zebra images are not usable for individual identification due to poor in-the-wild imaging conditions; camera trap images in particular present high rates of occlusion and high spatio-temporal similarity within image bursts. Our proposed filtering pipeline incorporates animal detection, species identification, viewpoint estimation, quality evaluation, and temporal subsampling to obtain individual crops suitable for re-ID, which are subsequently curated by the LCA decision management algorithm. Our method processed images taken during GGR-16 and GGR-18 in Meru County, Kenya, into 4,142 highly-comparable annotations, requiring only 120 contrastive human decisions to produce a population estimate within 4.6% of the ground-truth count. Our method also efficiently processed 8.9M unlabeled camera trap images from 70 cameras at the Mpala Research Centre in Laikipia County, Kenya over two years into 685 encounters of 173 individuals, requiring only 331 contrastive human decisions.
Key facts. Cited by 1 paper in the map (data through 7 Oct 2026). Builds on 13 of its 47 references that are in the map. First posted on arXiv 30 Nov 2024.
Builds on
13 of 47 references.
References · 13
- 2018Recent Advances in Open Set Recognition: A Surveycited by 309
- 2021Seeing biodiversity: perspectives in machine learning for wildlife conservationcited by 129
- 2019Efficient Pipeline for Camera Trap Image Reviewcited by 79
- 2017Pose Invariant Embedding for Deep Person Re-identificationcited by 47
- 2018Past, Present, and Future Approaches Using Computer Vision for Animal Re-Identification from Camera Trap Datacited by 45
- 2019Context R-CNN: Long Term Temporal Context for Per-Camera Object Detectioncited by 45
- 2019A deep active learning system for species identification and counting in camera trap imagescited by 44
- 2019Synthetic Examples Improve Generalization for Rare Classescited by 35
- 2021Perspectives on individual animal identification from biology and computer visioncited by 31
- 2016Human-In-The-Loop Person Re-Identificationcited by 19
- 2019Robust Re-identification of Manta Rays from Natural Markings by Learning Pose Invariant Embeddingscited by 17
- 2021ElephantBook: A Semi-Automated Human-in-the-Loop System for Elephant Re-Identificationcited by 8
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Citing papers per year: 2026: 1.
1 paper.