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Anomaly Detection involves identifying deviations from normal data distributions and is critical in fields such as medical diagnostics and industrial defect detection. Traditional AD methods typically require the availability of normal…

Computer Vision and Pattern Recognition · Computer Science 2025-08-12 Alireza Salehi , Mohammadreza Salehi , Reshad Hosseini , Cees G. M. Snoek , Makoto Yamada , Mohammad Sabokrou

In this paper, we present an end-to-end unsupervised anomaly detection framework for 3D point clouds. To the best of our knowledge, this is the first work to tackle the anomaly detection task on a general object represented by a 3D point…

Computer Vision and Pattern Recognition · Computer Science 2023-04-10 Mana Masuda , Ryo Hachiuma , Ryo Fujii , Hideo Saito , Yusuke Sekikawa

High-precision point cloud anomaly detection is the gold standard for identifying the defects of advancing machining and precision manufacturing. Despite some methodological advances in this area, the scarcity of datasets and the lack of a…

Computer Vision and Pattern Recognition · Computer Science 2023-10-24 Jiaqi Liu , Guoyang Xie , Ruitao Chen , Xinpeng Li , Jinbao Wang , Yong Liu , Chengjie Wang , Feng Zheng

Pre-trained point cloud analysis models have shown promising advancements in various downstream tasks, yet their effectiveness is typically suffering from low-quality point cloud (i.e., noise and incompleteness), which is a common issue in…

Computer Vision and Pattern Recognition · Computer Science 2025-07-28 Zixiang Ai , Zhenyu Cui , Yuxin Peng , Jiahuan Zhou

Deep learning-based 3D anomaly detection methods have demonstrated significant potential in industrial manufacturing. However, many approaches are specifically designed for anomaly detection tasks, which limits their generalizability to…

Computer Vision and Pattern Recognition · Computer Science 2025-11-18 Yaohua Zha , Xue Yuerong , Chunlin Fan , Yuansong Wang , Tao Dai , Ke Chen , Shu-Tao Xia

Prompt learning is one of the most effective and trending ways to adapt powerful vision-language foundation models like CLIP to downstream datasets by tuning learnable prompt vectors with very few samples. However, although prompt learning…

Computer Vision and Pattern Recognition · Computer Science 2023-04-03 Cairong Zhao , Yubin Wang , Xinyang Jiang , Yifei Shen , Kaitao Song , Dongsheng Li , Duoqian Miao

Few-normal shot anomaly detection (FNSAD) aims to detect abnormal regions in images using only a few normal training samples, making the task highly challenging due to limited supervision and the diversity of potential defects. Recent…

Computer Vision and Pattern Recognition · Computer Science 2026-01-23 Morteza Poudineh , Marc Lalonde

Surface anomaly classification is critical for manufacturing system fault diagnosis and quality control. However, the following challenges always hinder accurate anomaly classification in practice: (i) Anomaly patterns exhibit intra-class…

Machine Learning · Statistics 2025-02-18 Xuanming Cao , Chengyu Tao , Juan Du

Drone-captured images present significant challenges in object detection due to varying shooting conditions, which can alter object appearance and shape. Factors such as drone altitude, angle, and weather cause these variations, influencing…

Computer Vision and Pattern Recognition · Computer Science 2024-11-15 Chanyeong Park , Heegwang Kim , Joonki Paik

Unsupervised Continuous Anomaly Detection (UCAD) is gaining attention for effectively addressing the catastrophic forgetting and heavy computational burden issues in traditional Unsupervised Anomaly Detection (UAD). However, existing UCAD…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Mingle Zhou , Jiahui Liu , Jin Wan , Gang Li , Min Li

Recently, large vision and language models have shown their success when adapting them to many downstream tasks. In this paper, we present a unified framework named CLIP-ADA for Anomaly Detection by Adapting a pre-trained CLIP model. To…

Computer Vision and Pattern Recognition · Computer Science 2024-03-15 Yuxuan Cai , Xinwei He , Dingkang Liang , Ao Tong , Xiang Bai

Anomaly detection (AD) is an important machine learning task with many real-world uses, including fraud detection, medical diagnosis, and industrial monitoring. Within natural language processing (NLP), AD helps detect issues like spam,…

Computation and Language · Computer Science 2025-10-13 Tiankai Yang , Yi Nian , Shawn Li , Ruiyao Xu , Yuangang Li , Jiaqi Li , Zhuo Xiao , Xiyang Hu , Ryan Rossi , Kaize Ding , Xia Hu , Yue Zhao

Zero-shot (ZS) 3D anomaly detection is crucial for reliable industrial inspection, as it enables detecting and localizing defects without requiring any target-category training data. Existing approaches render 3D point clouds into 2D images…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Kaiqiang Li , Gang Li , Mingle Zhou , Min Li , Delong Han , Jin Wan

Multimodal Prompt Learning (MPL) has emerged as a pivotal technique for adapting large-scale Visual Language Models (VLMs). However, current MPL methods are fundamentally limited by their optimization of a single, static point…

Computer Vision and Pattern Recognition · Computer Science 2025-12-01 Weiran Li , Yeqiang Liu , Yijie Wei , Mina Han , Xin Liu , Zhenbo Li

Change detection and irregular object extraction in 3D point clouds is a challenging task that is of high importance not only for autonomous navigation but also for updating existing digital twin models of various industrial environments.…

Computer Vision and Pattern Recognition · Computer Science 2023-12-18 Nikolaos Stathoulopoulos , Anton Koval , George Nikolakopoulos

Current Point-based detectors can only learn from the provided points, with limited receptive fields and insufficient global learning capabilities for such targets. In this paper, we present a novel Point Dilation Mechanism for single-stage…

Computer Vision and Pattern Recognition · Computer Science 2025-02-13 Ao Liang , Haiyang Hua , Jian Fang , Wenyu Chen , Huaici Zhao

The goal of open-vocabulary detection is to identify novel objects based on arbitrary textual descriptions. In this paper, we address open-vocabulary 3D point-cloud detection by a dividing-and-conquering strategy, which involves: 1)…

Computer Vision and Pattern Recognition · Computer Science 2023-05-18 Yuheng Lu , Chenfeng Xu , Xiaobao Wei , Xiaodong Xie , Masayoshi Tomizuka , Kurt Keutzer , Shanghang Zhang

Prompt-based learning, with its capability to tackle zero-shot and few-shot NLP tasks, has gained much attention in community. The main idea is to bridge the gap between NLP downstream tasks and language modeling (LM), by mapping these…

Computation and Language · Computer Science 2022-11-21 Yulong Chen , Yang Liu , Li Dong , Shuohang Wang , Chenguang Zhu , Michael Zeng , Yue Zhang

Pre-trained 3D vision models have gained significant attention for their promising performance on point cloud data. However, fully fine-tuning these models for downstream tasks is computationally expensive and storage-intensive. Existing…

Computer Vision and Pattern Recognition · Computer Science 2025-09-12 Zixiang Ai , Zichen Liu , Yuanhang Lei , Zhenyu Cui , Xu Zou , Jiahuan Zhou

With the rapid development of multi-cloud environments, it is increasingly important to ensure the security and reliability of intelligent monitoring systems. In this paper, we propose an anomaly detection and early warning mechanism for…

Machine Learning · Computer Science 2025-06-10 Yihong Jin , Ze Yang , Juntian Liu , Xinhe Xu