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Robust principal component analysis (RPCA) is a critical tool in modern machine learning, which detects outliers in the task of low-rank matrix reconstruction. In this paper, we propose a scalable and learnable non-convex approach for…

Machine Learning · Computer Science 2023-02-28 HanQin Cai , Jialin Liu , Wotao Yin

Clustering, or unsupervised classification, is a task often plagued by outliers. Yet there is a paucity of work on handling outliers in clustering. Outlier identification algorithms tend to fall into three broad categories: outlier…

Methodology · Statistics 2024-05-31 Katharine M. Clark , Paul D. McNicholas

In conventional supervised learning, a training dataset is given with ground-truth labels from a known label set, and the learned model will classify unseen instances to known labels. This paper studies a new problem setting in which there…

Machine Learning · Computer Science 2024-06-03 Peng Zhao , Jia-Wei Shan , Yu-Jie Zhang , Zhi-Hua Zhou

Model deficiency that results from incomplete training data is a form of structural blindness that leads to costly errors, oftentimes with high confidence. During the training of classification tasks, underrepresented class-conditional…

Machine Learning · Computer Science 2021-02-09 Bruno Abrahao , Zheng Wang , Haider Ahmed , Yuchen Zhu

The outlying property detection problem is the problem of discovering the properties distinguishing a given object, known in advance to be an outlier in a database, from the other database objects. In this paper, we analyze the problem…

Machine Learning · Computer Science 2013-06-18 Fabrizio Angiulli , Fabio Fassetti , Luigi Palopoli , Giuseppe Manco

We propose a neural network for unsupervised anomaly detection with a novel robust subspace recovery layer (RSR layer). This layer seeks to extract the underlying subspace from a latent representation of the given data and removes outliers…

Machine Learning · Computer Science 2022-01-19 Chieh-Hsin Lai , Dongmian Zou , Gilad Lerman

We consider the challenging problem of zero-shot video object segmentation (VOS). That is, segmenting and tracking multiple moving objects within a video fully automatically, without any manual initialization. We treat this as a grouping…

Computer Vision and Pattern Recognition · Computer Science 2020-08-17 Shreyank N Gowda , Panagiotis Eustratiadis , Timothy Hospedales , Laura Sevilla-Lara

We attack the problem of learning concepts automatically from noisy web image search results. Going beyond low level attributes, such as colour and texture, we explore weakly-labelled datasets for the learning of higher level concepts, such…

Computer Vision and Pattern Recognition · Computer Science 2013-12-17 Eren Golge , Pinar Duygulu

Various technologies, including computer vision models, are employed for the automatic monitoring of manual assembly processes in production. These models detect and classify events such as the presence of components in an assembly area or…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Anton Sergeev , Victor Minchenkov , Aleksei Soldatov , Vasiliy Kakurin , Yaroslav Mazikov

The detection of out of distribution samples for image classification has been widely researched. Safety critical applications, such as autonomous driving, would benefit from the ability to localise the unusual objects causing the image to…

Computer Vision and Pattern Recognition · Computer Science 2019-11-11 Matt Angus , Krzysztof Czarnecki , Rick Salay

We critically appraise the recent interest in out-of-distribution (OOD) detection and question the practical relevance of existing benchmarks. While the currently prevalent trend is to consider different datasets as OOD, we argue that…

Computer Vision and Pattern Recognition · Computer Science 2019-11-25 Faruk Ahmed , Aaron Courville

Out-of-distribution (OoD) inputs pose a persistent challenge to deep learning models, often triggering overconfident predictions on non-target objects. While prior work has primarily focused on refining scoring functions and adjusting…

Computer Vision and Pattern Recognition · Computer Science 2026-01-05 Changshun Wu , Weicheng He , Chih-Hong Cheng , Xiaowei Huang , Saddek Bensalem

Segmenting object parts such as cup handles and animal bodies is important in many real-world applications but requires more annotation effort. The largest dataset nowadays contains merely two hundred object categories, implying the…

Computer Vision and Pattern Recognition · Computer Science 2023-05-29 Tai-Yu Pan , Qing Liu , Wei-Lun Chao , Brian Price

Accurate object segmentation is a crucial task in the context of robotic manipulation. However, creating sufficient annotated training data for neural networks is particularly time consuming and often requires manual labeling. To this end,…

Computer Vision and Pattern Recognition · Computer Science 2020-11-09 Wout Boerdijk , Martin Sundermeyer , Maximilian Durner , Rudolph Triebel

While reinforcement learning (RL) algorithms have been successfully applied across numerous sequential decision-making problems, their generalization to unforeseen testing environments remains a significant concern. In this paper, we study…

Machine Learning · Computer Science 2024-04-11 Linas Nasvytis , Kai Sandbrink , Jakob Foerster , Tim Franzmeyer , Christian Schroeder de Witt

The detection of unknown traffic obstacles is vital to ensure safe autonomous driving. The standard object-detection methods cannot identify unknown objects that are not included under predefined categories. This is because object-detection…

Computer Vision and Pattern Recognition · Computer Science 2024-03-28 Chihiro Noguchi , Toshiaki Ohgushi , Masao Yamanaka

Most of the existing methods for anomaly detection use only positive data to learn the data distribution, thus they usually need a pre-defined threshold at the detection stage to determine whether a test instance is an outlier.…

Machine Learning · Computer Science 2019-03-19 Kai Tian , Shuigeng Zhou , Jianping Fan , Jihong Guan

We hypothesize that similar objects should have similar outlier scores. To our knowledge, all existing outlier detectors calculate the outlier score for each object independently regardless of the outlier scores of the other objects.…

Machine Learning · Computer Science 2023-03-20 Jiawei Yang , Susanto Rahardja , Pasi Franti

Outlier detection is an important task in data mining and many technologies have been explored in various applications. However, due to the default assumption that outliers are non-concentrated, unsupervised outlier detection may not…

Machine Learning · Computer Science 2020-03-10 Zhe Li , Chunhua Sun , Chunli Liu , Xiayu Chen , Meng Wang , Yezheng Liu

Unsupervised semantic segmentation (USS) aims to achieve high-quality segmentation without manual pixel-level annotations. Existing USS models provide coarse category classification for regions, but the results often have blurry and…

Multimedia · Computer Science 2024-05-21 Tingting Li , Gensheng Pei , Xinhao Cai , Huafeng Liu , Qiong Wang , Yazhou Yao