一种用于通用无监督异常检测的特征打乱与恢复策略 / A Feature Shuffling and Restoration Strategy for Universal Unsupervised Anomaly Detection
1️⃣ 一句话总结
这篇论文提出了一种名为FSR的新方法,通过打乱并恢复图像特征而非原始像素,有效解决了现有异常检测模型在不同场景下性能不稳定的问题,从而构建了一个通用的、性能优异的异常检测框架。
Unsupervised anomaly detection is vital in industrial fields, with reconstruction-based methods favored for their simplicity and effectiveness. However, reconstruction methods often encounter an identical shortcut issue, where both normal and anomalous regions can be well reconstructed and fail to identify outliers. The severity of this problem increases with the complexity of the normal data distribution. Consequently, existing methods may exhibit excellent detection performance in a specific scenario, but their performance sharply declines when transferred to another scenario. This paper focuses on establishing a universal model applicable to anomaly detection tasks across different settings, termed as universal anomaly detection. In this work, we introduce a novel, straightforward yet efficient framework for universal anomaly detection: \uline{F}eature \uline{S}huffling and \uline{R}estoration (FSR), which can alleviate the identical shortcut issue across different settings. First and foremost, FSR employs multi-scale features with rich semantic information as reconstruction targets, rather than raw image pixels. Subsequently, these multi-scale features are partitioned into non-overlapping feature blocks, which are randomly shuffled and then restored to their original state using a restoration network. This simple paradigm encourages the model to focus more on global contextual information. Additionally, we introduce a novel concept, the shuffling rate, to regulate the complexity of the FSR task, thereby alleviating the identical shortcut across different settings. Furthermore, we provide theoretical explanations for the effectiveness of FSR framework from two perspectives: network structure and mutual information. Extensive experimental results validate the superiority and efficiency of the FSR framework across different this http URL is available at this https URL.
一种用于通用无监督异常检测的特征打乱与恢复策略 / A Feature Shuffling and Restoration Strategy for Universal Unsupervised Anomaly Detection
这篇论文提出了一种名为FSR的新方法,通过打乱并恢复图像特征而非原始像素,有效解决了现有异常检测模型在不同场景下性能不稳定的问题,从而构建了一个通用的、性能优异的异常检测框架。
源自 arXiv: 2603.22861