One persistent obstacle in industrial quality inspection is the detection of anomalies. In real-world use cases, two problems must be addressed: anomalous data is sparse and the same types of anomalies need to be detected on previously unseen objects. Current anomaly detection approaches can be trained with sparse nominal data, whereas domain generalization approaches enable detecting objects in previously unseen domains. Utilizing those two observations, we introduce the hybrid task of domain generalization on sparse classes. To introduce an accompanying dataset for this task, we present a modification of the well-established MVTec AD dataset by generating three new datasets. In addition to applying existing methods for benchmark, we design two embedding-based approaches, Spatial Embedding MLP (SEMLP) and Labeled PatchCore. Overall, SEMLP achieves the best performance with an average image-level AUROC of 87.2 % vs. 80.4 % by MIRO. The new and openly available datasets allow for further research to improve industrial anomaly detection.

在工业质量检验中，检测异常数据是一个持久存在的障碍。本文介绍了一种新的领域概括方法，能够训练带有稀疏正常数据的异常检测模型，并能够在之前未见过的对象上检测相同类型的异常。通过生成新的数据集，改进了现有的MVTec AD数据集，并使用两种基于嵌入的方法 SEMLP 和 Labeled PatchCore 进行了设计。整体上，SEMLP取得了最佳的性能表现，图像级平均AUROC为87.2%。这些新的数据集可以为改进工业异常检测的进一步研究提供基础。

领域无关的已知异常检测