ReMP-AD: Retrieval-enhanced Multi-modal Prompt Fusion for Few-Shot Industrial Visual Anomaly Detection

Hongchi Ma, Guanglei Yang, Debin Zhao, Yanli Ji, Wangmeng Zuo; Proceedings of the IEEE/CVF International Conference on Computer Vision (ICCV), 2025, pp. 20425-20434

Industrial visual inspection is crucial for detecting defects in manufactured products, but it traditionally relies on human operators, leading to inefficiencies. Industrial Visual Anomaly Detection (IVAD) has emerged as a promising solution, with methods such as zero-shot, few-shot, and reconstruction-based techniques. However, zero-shot methods struggle with subtle anomalies, and reconstruction-based methods fail to capture fine-grained details. Few-shot methods, which use limited samples and prompts, offer a more efficient approach. Despite their promise, challenges remain in managing intra-class variation among references and in effectively extracting more representative anomaly features.This paper presents Retrieval-enhanced Multi-modal Prompt Fusion Anomaly Detection (ReMP-AD), a framework that introduces Intra-Class Token Retrieval (ICTR) to reduce noise in the memory bank and Vision-Language Prior Fusion (VLPF) to guide the encoder in capturing more distinctive and relevant features of anomalies. Experiments on the VisA and MVTec-AD datasets demonstrate that ReMP-AD outperforms existing methods, achieving 97.8%/94.1% performance in 4-shot anomaly segmentation and classification. Our approach also shows strong results on the PCB-Bank dataset, highlighting its effectiveness in few-shot industrial anomaly detection. Code is available at https://github.com/cshcma/ReMP-AD.git