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Anomaly detection refers to the task of finding unusual instances that stand out from the normal data. In several applications, these outliers or anomalous instances are of greater interest compared to the normal ones. Specifically in the…

Image and Video Processing · Electrical Eng. & Systems 2020-01-14 Manpreet Singh Minhas , John Zelek

Unsupervised anomaly in industry has been a concerning topic and a stepping stone for high performance industrial automation process. The vast majority of industry-oriented methods focus on learning from good samples to detect anomaly…

Computer Vision and Pattern Recognition · Computer Science 2023-06-21 Simon Thomine , Hichem Snoussi , Mahmoud Soua

Convolutional autoencoders have emerged as popular methods for unsupervised defect segmentation on image data. Most commonly, this task is performed by thresholding a pixel-wise reconstruction error based on an $\ell^p$ distance. This…

Computer Vision and Pattern Recognition · Computer Science 2019-04-09 Paul Bergmann , Sindy Löwe , Michael Fauser , David Sattlegger , Carsten Steger

We present an automated vision-based system for defect detection and classification of laser power meter sensor coatings. Our approach addresses the critical challenge of identifying coating defects such as thermal damage and scratches that…

Computer Vision and Pattern Recognition · Computer Science 2025-09-26 Dongqi Zheng , Wenjin Fu , Guangzong Chen

Despite impressive progress in object detection over the last years, it is still an open challenge to reliably detect objects across visual domains. Although the topic has attracted attention recently, current approaches all rely on the…

Computer Vision and Pattern Recognition · Computer Science 2020-05-26 Antonio D'Innocente , Francesco Cappio Borlino , Silvia Bucci , Barbara Caputo , Tatiana Tommasi

Unsupervised domain adaptation (UDA) plays a crucial role in object detection when adapting a source-trained detector to a target domain without annotated data. In this paper, we propose a novel and effective four-step UDA approach that…

Computer Vision and Pattern Recognition · Computer Science 2023-08-30 Mohamed L. Mekhalfi , Davide Boscaini , Fabio Poiesi

Supervised learning with large scale labeled datasets and deep layered models has made a paradigm shift in diverse areas in learning and recognition. However, this approach still suffers generalization issues under the presence of a domain…

Machine Learning · Statistics 2016-03-28 Ozan Sener , Hyun Oh Song , Ashutosh Saxena , Silvio Savarese

Automatic defect detection for 3D printing processes, which shares many characteristics with change detection problems, is a vital step for quality control of 3D printed products. However, there are some critical challenges in the current…

Computer Vision and Pattern Recognition · Computer Science 2023-08-04 Yushuo Niu , Ethan Chadwick , Anson W. K. Ma , Qian Yang

This work tackles the unsupervised cross-domain object detection problem which aims to generalize a pre-trained object detector to a new target domain without labels. We propose an uncertainty-aware model adaptation method, which is based…

Computer Vision and Pattern Recognition · Computer Science 2021-08-31 Minjie Cai , Minyi Luo , Xionghu Zhong , Hao Chen

Anomalous sound detection (ASD) is, nowadays, one of the topical subjects in machine listening discipline. Unsupervised detection is attracting a lot of interest due to its immediate applicability in many fields. For example, related to…

Audio and Speech Processing · Electrical Eng. & Systems 2020-06-30 Sergi Perez-Castanos , Javier Naranjo-Alcazar , Pedro Zuccarello , Maximo Cobos

The detection of nuclei is one of the most fundamental components of computational pathology. Current state-of-the-art methods are based on deep learning, with the prerequisite that extensive labeled datasets are available. The increasing…

Image and Video Processing · Electrical Eng. & Systems 2019-07-11 Nicolas Brieu , Armin Meier , Ansh Kapil , Ralf Schoenmeyer , Christos G. Gavriel , Peter D. Caie , Günter Schmidt

Surface defect detection is a critical task across numerous industries, aimed at efficiently identifying and localising imperfections or irregularities on manufactured components. While numerous methods have been proposed, many fail to meet…

Computer Vision and Pattern Recognition · Computer Science 2025-10-20 Blaž Rolih , Matic Fučka , Danijel Skočaj

Semi-Supervised classification and segmentation methods have been widely investigated in medical image analysis. Both approaches can improve the performance of fully-supervised methods with additional unlabeled data. However, as a…

Computer Vision and Pattern Recognition · Computer Science 2021-06-04 Hong-Yu Zhou , Chengdi Wang , Haofeng Li , Gang Wang , Shu Zhang , Weimin Li , Yizhou Yu

Deep learning techniques have achieved great success in remote sensing image change detection. Most of them are supervised techniques, which usually require large amounts of training data and are limited to a particular application.…

Image and Video Processing · Electrical Eng. & Systems 2021-10-11 Yuxing Chen , Lorenzo Bruzzone

The surface defect detection method based on visual perception has been widely used in industrial quality inspection. Because defect data are not easy to obtain and the annotation of a large number of defect data will waste a lot of…

Computer Vision and Pattern Recognition · Computer Science 2022-03-14 Qifan Jin , Li Chen

Hyperspectral anomaly detection (HAD), a crucial approach for many civilian and military applications, seeks to identify pixels with spectral signatures that are anomalous relative to a preponderance of background signatures. Significant…

Computer Vision and Pattern Recognition · Computer Science 2025-10-02 Abu Hasnat Mohammad Rubaiyat , Jordan Vincent , Colin Olson

Anomalies can be defined as any non-random structure which deviates from normality. Anomaly detection methods reported in the literature are numerous and diverse, as what is considered anomalous usually varies depending on particular…

Computer Vision and Pattern Recognition · Computer Science 2021-10-07 Matias Tailanian , Pablo Musé , Álvaro Pardo

Surface defect inspection based on machine vision is often affected by uneven illumination. In order to improve the inspection rate of surface defects inspection under uneven illumination condition, this paper proposes a method for…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Hao Wu , Yulong Liu , Wenbin Gao , Xiangrong Xu

In the realm of industrial quality inspection, defect detection stands as a critical component, particularly in high-precision, safety-critical sectors such as automotive components aerospace, and medical devices. Traditional methods,…

Computer Vision and Pattern Recognition · Computer Science 2025-07-09 Shuai Li , Shihan Chen , Wanru Geng , Zhaohua Xu , Xiaolu Liu , Can Dong , Zhen Tian , Changlin Chen

Recently, cross domain transfer has been applied for unsupervised image restoration tasks. However, directly applying existing frameworks would lead to domain-shift problems in translated images due to lack of effective supervision.…

Computer Vision and Pattern Recognition · Computer Science 2020-03-31 Wenchao Du , Hu Chen , Hongyu Yang