arXiv:2603.26754cs.CVcs.AI2026-03被引 1

用真实相机陷阱图像生成野生动物健康异常的合成数据,解决训练数据缺失问题。

Generating Synthetic Wildlife Health Data from Camera Trap Imagery: A Pipeline for Alopecia and Body Condition Training Data

  • 基于真实图像和生成模型,可控生成脱毛与消瘦症状的合成图像。
  • 从201张基础图像生成553张合格合成图像,通过率83%。
  • 合成数据可直接用于健康筛查,实测准确率达0.85 AUROC。

目前缺乏公开可用、适用于机器学习的相机陷阱影像野生动物健康数据集,严重制约自动化健康筛查的发展。本文提出一个合成数据生成流程,从真实相机陷阱图像中生成体现脱毛和体况恶化症状的合成图像。该流程基于iWildCam数据集,利用MegaDetector检测框并采用中心帧加权分层采样策略,构建涵盖8种北美洲动物的精选基础图像集。通过生成型表型编辑系统,可控生成符合疥螨病和消瘦特征的严重程度变化图像。采用自适应场景漂移质量控制机制,结合假预过滤与解耦掩码评分方法,结合昼夜互补指标,有效剔除生成模型改变原始场景的图像。将整个流程明确界定为筛查数据来源。从4个物种的201张基础图像出发,生成553张通过质量控制的合成变体,整体通过率达83%。仅使用合成数据训练并在真实相机陷阱图像上测试疑似健康异常样本的模拟到真实迁移实验,取得0.85 AUROC,证明合成数据已捕捉足够视觉特征以支持筛查任务。

原文摘要 · Abstract (English)

No publicly available, ML ready datasets exist for wildlife health conditions in camera trap imagery, creating a fundamental barrier to automated health screening. We present a pipeline for generating synthetic training images depicting alopecia and body condition deterioration in wildlife from real camera trap photographs. Our pipeline constructs a curated base image set from iWildCam using MegaDetector derived bounding boxes and center frame weighted stratified sampling across 8 North American species. A generative phenotype editing system produces controlled severity variants depicting hair loss consistent with mange and emaciation. An adaptive scene drift quality control system uses a sham prefilter and decoupled mask then score approach with complementary day or night metrics to reject images where the generative model altered the original scene. We frame the pipeline explicitly as a screening data source. From 201 base images across 4 species, we generate 553 QC passing synthetic variants with an overall pass rate of 83 percent. A sim to real transfer experiment training exclusively on synthetic data and testing on real camera trap images of suspected health conditions achieves 0.85 AUROC, demonstrating that the synthetic data captures visual features sufficient for screening.

合成数据野生动物健康监测生成模型

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