A Discriminative DeepLab Model (DDLM) for Surface Anomaly Detection and Localization
Nana Kankam Gyimah, Kishor Datta Gupta, Mahmoud Nabil, Xuyang Yan, Abenezer Girma, Abdollah Homaifar, Daniel Opoku · 2023
Recent reconstructive model-based visual anomaly detection (AD) methods have been shown to reconstruct the normal regions of the image but often struggle to detect the required anomalous deviations. These approaches are typically trained on images without anomalies and consequently require manual post-processing techniques to localize the anomalies. In this paper, we proposed a discriminative deeplab model that is trained discriminatively end-to-end on out-of-distribution simulated anomalies. Our proposed framework directly localizes anomalies without the need for complex post-processing via learning a combined representation of anomalous images and a decision boundary between anomalous and normal samples. The effectiveness of our DDLM is evaluated extensively on the MVTec AD dataset. Our results show that the DDLM framework outperformed state-of-the-art frameworks between 1.5% and 18.8% in AUROC on the anomaly detection challenge and between 20.2% and 22.9% with regards to the AP on the anomaly localization challenge.