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Find location of image anomalies using neural net trained on simulated anomalies

Updated: Aug 27, 2021

Find location of image anomalies using neural net trained on simulated anomalies


DRÆM -- A discriminatively trained reconstruction embedding for surface anomaly detection



Visual surface anomaly detection aims to detect local image regions that significantly deviate from normal appearance.


Recent surface anomaly detection methods rely on generative models ... trained only on anomaly-free images, and often require hand-crafted post-processing steps to localize the anomalies


... propose ... (DRAEM) ... learns a joint representation of an anomalous image and its anomaly-free reconstruction, while simultaneously learning a decision boundary between normal and anomalous examples.


... enables direct anomaly localization without the need for additional complicated post-processing of the network output and can be trained using simple and general anomaly simulations.


... DRAEM outperforms the current state-of-the-art unsupervised methods by a large margin and even delivers detection performance close to the fully-supervised methods on the widely used DAGM surface-defect detection dataset, while substantially outperforming them in localization accuracy.



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