AMI-Net: Adaptive Mask Inpainting Network for Industrial Anomaly Detection and Localization

TL;DR

AMI-Net is an innovative adaptive mask inpainting network that leverages multi-scale semantic features and a novel masking strategy to improve industrial anomaly detection and localization, achieving high accuracy and real-time performance.

Contribution

The paper introduces a new adaptive mask generator and a multi-scale semantic feature-based reconstruction approach for improved anomaly detection.

Findings

Effective anomaly localization on industrial datasets

Achieves real-time detection with high accuracy

Outperforms existing reconstruction-based methods

Abstract

Unsupervised visual anomaly detection is crucial for enhancing industrial production quality and efficiency. Among unsupervised methods, reconstruction approaches are popular due to their simplicity and effectiveness. The key aspect of reconstruction methods lies in the restoration of anomalous regions, which current methods have not satisfactorily achieved. To tackle this issue, we introduce a novel \uline{A}daptive \uline{M}ask \uline{I}npainting \uline{Net}work (AMI-Net) from the perspective of adaptive mask-inpainting. In contrast to traditional reconstruction methods that treat non-semantic image pixels as targets, our method uses a pre-trained network to extract multi-scale semantic features as reconstruction targets. Given the multiscale nature of industrial defects, we incorporate a training strategy involving random positional and quantitative masking. Moreover, we propose an innovative adaptive mask generator capable of generating adaptive masks that effectively mask anomalous regions while preserving normal regions. In this manner, the model can leverage the visible normal global contextual information to restore the masked anomalous regions, thereby effectively suppressing the reconstruction of defects. Extensive experimental results on the MVTec AD and BTAD industrial datasets validate the effectiveness of the proposed method. Additionally, AMI-Net exhibits exceptional real-time performance, striking a favorable balance between detection accuracy and speed, rendering it highly suitable for industrial applications. Code is available at: https://github.com/luow23/AMI-Net