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kNN is a very effective Instance based learning method, and it is easy to implement. Due to heterogeneous nature of data, noises from different possible sources are also widespread in nature especially in case of large-scale databases. For…

Machine Learning · Computer Science 2020-05-19 Joydip Dhar , Ashaya Shukla , Mukul Kumar , Prashant Gupta

This paper introduces a universal approach to seamlessly combine out-of-distribution (OOD) detection scores. These scores encompass a wide range of techniques that leverage the self-confidence of deep learning models and the anomalous…

Machine Learning · Statistics 2024-06-25 Eduardo Dadalto , Florence Alberge , Pierre Duhamel , Pablo Piantanida

Outlier detection has received special attention in various fields, mainly for those dealing with machine learning and artificial intelligence. As strong outliers, anomalies are divided into the point, contextual and collective outliers.…

Machine Learning · Computer Science 2020-01-29 Rasoul Kiani , Amin Keshavarzi , Mahdi Bohlouli

Safety-critical applications like autonomous driving use Deep Neural Networks (DNNs) for object detection and segmentation. The DNNs fail to predict when they observe an Out-of-Distribution (OOD) input leading to catastrophic consequences.…

Computer Vision and Pattern Recognition · Computer Science 2022-11-14 Lokesh Veeramacheneni , Matias Valdenegro-Toro

Advances in computational power and hardware efficiency have enabled tackling increasingly complex, high-dimensional problems. While artificial intelligence (AI) achieves remarkable results, the interpretability of high-dimensional…

Machine Learning · Computer Science 2025-03-11 Federico Tessari , Kunpeng Yao , Neville Hogan

In this paper, we introduce a new framework called the sentiment-aspect attribution module (SAAM). SAAM works on top of traditional neural networks and is designed to address the problem of multi-aspect sentiment classification and…

Computation and Language · Computer Science 2020-12-16 Yifan Zhang , Fan Yang , Marjan Hosseinia , Arjun Mukherjee

Unsupervised anomaly detection stands as an important problem in machine learning, with applications in financial fraud prevention, network security and medical diagnostics. Existing unsupervised anomaly detection algorithms rarely perform…

Machine Learning · Computer Science 2026-02-04 Pritam Kar , Rahul Bordoloi , Olaf Wolkenhauer , Saptarshi Bej

Out-of-distribution (OOD) detection is an indispensable aspect of secure AI when deploying machine learning models in real-world applications. Previous paradigms either explore better scoring functions or utilize the knowledge of outliers…

Machine Learning · Computer Science 2023-06-07 Jianing Zhu , Hengzhuang Li , Jiangchao Yao , Tongliang Liu , Jianliang Xu , Bo Han

Out-of-Distribution (OOD) detection, aiming to distinguish outliers from known categories, has gained prominence in practical scenarios. Recently, the advent of vision-language models (VLM) has heightened interest in enhancing OOD detection…

Computer Vision and Pattern Recognition · Computer Science 2025-02-27 Fanhu Zeng , Zhen Cheng , Fei Zhu , Hongxin Wei , Xu-Yao Zhang

The adaptive asymmetric trimmed mean is a known way of estimating central location, usually in conjunction with the bootstrap. It is here modified and applied to meta-analysis, as a way of dealing with outlying results by down-weighting the…

Applications · Statistics 2019-07-17 Rose Baker

Out-of-Domain (OOD) generalization is the ability of a model trained on one or more domains to generalize to unseen domains. In the ImageNet era of computer vision, evaluation sets for measuring a model's OOD performance were designed to be…

Computer Vision and Pattern Recognition · Computer Science 2025-06-09 Prasanna Mayilvahanan , Roland S. Zimmermann , Thaddäus Wiedemer , Evgenia Rusak , Attila Juhos , Matthias Bethge , Wieland Brendel

The reliability of supervised classifiers is severely hampered by their limitations in dealing with unexpected inputs, leading to great interest in out-of-distribution (OOD) detection. Recently, OOD detectors trained on synthetic outliers,…

Computer Vision and Pattern Recognition · Computer Science 2024-11-22 Lars Doorenbos , Raphael Sznitman , Pablo Márquez-Neila

Out-of-Distribution (OOD) detection is essential for the trustworthiness of AI systems. Methods using prior information (i.e., subspace-based methods) have shown effective performance by extracting information geometry to detect OOD data…

Computer Vision and Pattern Recognition · Computer Science 2025-06-25 Kaiyu Guo , Zijian Wang , Tan Pan , Brian C. Lovell , Mahsa Baktashmotlagh

Classifying imbalanced datasets remains a significant challenge in machine learning, particularly with big data where instances are unevenly distributed among classes, leading to class imbalance issues that impact classifier performance.…

Machine Learning · Computer Science 2025-04-18 Khaled SH. Raslan , Almohammady S. Alsharkawy , K. R. Raslan

Local feature matching is a critical component of many computer vision pipelines, including among others Structure-from-Motion, SLAM, and Visual Localization. However, due to limitations in the descriptors, raw matches are often…

Computer Vision and Pattern Recognition · Computer Science 2020-06-09 Luca Cavalli , Viktor Larsson , Martin Ralf Oswald , Torsten Sattler , Marc Pollefeys

OAM spectrum reflects the OAM component included in measured light field which is crucial in OAM -based application. However, traditional definition-based OAM spectrum algorithm is extraordinary time-consuming and limited to prior knowledge…

Optics · Physics 2024-09-11 Zheng Han , Bowen Yang , Xiao Chen , Yiquan Wang

We present a principled approach for detecting out-of-distribution (OOD) and adversarial samples in deep neural networks. Our approach consists in modeling the outputs of the various layers (deep features) with parametric probability…

Machine Learning · Statistics 2019-09-27 Nilesh A. Ahuja , Ibrahima Ndiour , Trushant Kalyanpur , Omesh Tickoo

A key feature of out-of-distribution (OOD) detection is to exploit a trained neural network by extracting statistical patterns and relationships through the multi-layer classifier to detect shifts in the expected input data distribution.…

Machine Learning · Computer Science 2023-06-07 Eduardo Dadalto , Pierre Colombo , Guillaume Staerman , Nathan Noiry , Pablo Piantanida

Out-of-Distribution (OOD) detection is a critical task that has garnered significant attention. The emergence of CLIP has spurred extensive research into zero-shot OOD detection, often employing a training-free approach. Current methods…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 Haoran Xu , Yanlin Liu , Zizhao Tong , Jiaze Li , Kexue Fu , Yuyang Zhang , Longxiang Gao , Shuaiguang Li , Xingyu Li , Yanran Xu , Changwei Wang

Abdominal multi-organ segmentation of computed tomography (CT) images has been the subject of extensive research interest. It presents a substantial challenge in medical image processing, as the shape and distribution of abdominal organs…

Computer Vision and Pattern Recognition · Computer Science 2020-02-12 Yuchen Xu , Olivia Tang , Yucheng Tang , Ho Hin Lee , Yunqiang Chen , Dashan Gao , Shizhong Han , Riqiang Gao , Michael R. Savona , Richard G. Abramson , Yuankai Huo , Bennett A. Landman
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