arXiv:2412.00290cs.CVcs.AI2024-12被引 3

用智能筛选提升斑马图像识别率,大幅减少人工判读量。

Adapting the re-ID challenge for static sensors

  • 构建多步骤过滤流水线,自动挑选适合重识别的斑马图像。
  • 处理4142张图像仅需120次人工判断,估算误差低于4.6%。
  • 适用于长期野外监测,适合生态研究与保护项目使用。

2016年和2018年的格里维斑马种群普查得益于大格里维斯巡游(GGR)这一公民科学活动,通过专家与算法对志愿者拍摄的图像进行标注,实现种群估算。另一种可扩展、长期的监测方式是部署相机陷阱网络。然而,在两种场景下,绝大多数斑马图像因野外成像条件差而无法用于个体识别;特别是相机陷阱图像存在高遮挡率和图像序列中时空相似性高的问题。本文提出一种过滤流水线,包含动物检测、物种识别、视角估计、质量评估和时间子采样,以获取适合重识别的个体图像,再由LCA决策管理算法进行人工校准。该方法将肯尼亚梅鲁县的GGR-16和GGR-18图像处理为4,142个高度可比的标注,仅需120次对比人工判断即可得出与真实数量相差4.6%的种群估算结果。同时,该方法高效处理了肯尼亚拉基皮亚县姆帕拉研究中心两年内70个相机拍摄的890万张未标注图像,提取出685次斑马出现记录,涵盖173个个体,仅需331次对比人工判断。

原文摘要 · Abstract (English)

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.

生物识别图像筛选生态保护相机陷阱

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