Real-time video analytics on edge devices for changing scenes remains a
difficult task. As edge devices are usually resource-constrained, edge deep
neural networks (DNNs) have fewer weights and shallower architectures than
general DNNs. As a result, they only perform well in limited scenarios and are
sensitive to data drift. In this paper, we introduce EdgeMA, a practical and
efficient video analytics system designed to adapt models to shifts in
real-world video streams over time, addressing the data drift problem. EdgeMA
extracts the gray level co-occurrence matrix based statistical texture feature
and uses the Random Forest classifier to detect the domain shift. Moreover, we
have incorporated a method of model adaptation based on importance weighting,
specifically designed to update models to cope with the label distribution
shift. Through rigorous evaluation of EdgeMA on a real-world dataset, our
results illustrate that EdgeMA significantly improves inference accuracy.

EdgeMA 是一个实际高效的视频分析系统，通过基于统计纹理特征的灰度共生矩阵提取和随机森林分类器检测领域转变，以及基于重要性加权的模型适应方法，解决了边缘设备上实时视频分析中数据漂移问题，并通过真实数据集的严格评估，结果表明 EdgeMA 显著提高了推理准确性。