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In this paper, we study the problem of unsupervised object detection from 3D point clouds in self-driving scenes. We present a simple yet effective method that exploits (i) point clustering in near-range areas where the point clouds are…

Computer Vision and Pattern Recognition · Computer Science 2023-11-06 Lunjun Zhang , Anqi Joyce Yang , Yuwen Xiong , Sergio Casas , Bin Yang , Mengye Ren , Raquel Urtasun

Unsupervised 3D object detection methods have emerged to leverage vast amounts of data without requiring manual labels for training. Recent approaches rely on dynamic objects for learning to detect mobile objects but penalize the detections…

Computer Vision and Pattern Recognition · Computer Science 2025-02-20 Ted Lentsch , Holger Caesar , Dariu M. Gavrila

Using unlabeled data to regularize the machine learning models has demonstrated promise for improving safety and reliability in detecting out-of-distribution (OOD) data. Harnessing the power of unlabeled in-the-wild data is non-trivial due…

Machine Learning · Computer Science 2024-02-07 Xuefeng Du , Zhen Fang , Ilias Diakonikolas , Yixuan Li

Unsupervised out-of-distribution (OOD) detection aims to identify out-of-domain data by learning only from unlabeled In-Distribution (ID) training samples, which is crucial for developing a safe real-world machine learning system. Current…

Computer Vision and Pattern Recognition · Computer Science 2026-02-03 Ying Yang , De Cheng , Chaowei Fang , Yubiao Wang , Changzhe Jiao , Lechao Cheng , Nannan Wang

Recently, similarity-preserving hashing methods have been extensively studied for large-scale image retrieval. Compared with unsupervised hashing, supervised hashing methods for labeled data have usually better performance by utilizing…

Computer Vision and Pattern Recognition · Computer Science 2018-11-27 Rong-Cheng Tu , Xian-Ling Mao , Bo-Si Feng , Bing-Bing Bian , Yu-shu Ying

Out-of-distribution (OOD) detection aims to detect "unknown" data whose labels have not been seen during the in-distribution (ID) training process. Recent progress in representation learning gives rise to distance-based OOD detection that…

Computer Vision and Pattern Recognition · Computer Science 2023-08-22 Ji Zhang , Lianli Gao , Bingguang Hao , Hao Huang , Jingkuan Song , Hengtao Shen

Out-of-distribution (OOD) detection empowers the model trained on the closed image set to identify unknown data in the open world. Though many prior techniques have yielded considerable improvements in this research direction, two crucial…

Computer Vision and Pattern Recognition · Computer Science 2024-01-18 Sen Pei

Deep Learning models perform unreliably when the data comes from a distribution different from the training one. In critical applications such as medical imaging, out-of-distribution (OOD) detection methods help to identify such data…

Image and Video Processing · Electrical Eng. & Systems 2023-06-26 Anton Vasiliuk , Daria Frolova , Mikhail Belyaev , Boris Shirokikh

3D object detection plays an important role in autonomous driving and other robotics applications. However, these detectors usually require training on large amounts of annotated data that is expensive and time-consuming to collect.…

Computer Vision and Pattern Recognition · Computer Science 2023-03-08 Jianren Wang , Haiming Gang , Siddharth Ancha , Yi-Ting Chen , David Held

Multimodal fusion, leveraging data like vision and language, is rapidly gaining traction. This enriched data representation improves performance across various tasks. Existing methods for out-of-distribution (OOD) detection, a critical area…

Computer Vision and Pattern Recognition · Computer Science 2024-08-29 Jinglun Li , Xinyu Zhou , Kaixun Jiang , Lingyi Hong , Pinxue Guo , Zhaoyu Chen , Weifeng Ge , Wenqiang Zhang

LiDAR-based 3D object detection is an indispensable task in advanced autonomous driving systems. Though impressive detection results have been achieved by superior 3D detectors, they suffer from significant performance degeneration when…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Yan Wang , Junbo Yin , Wei Li , Pascal Frossard , Ruigang Yang , Jianbing Shen

Semi-supervised learning (semi-SL) is a promising alternative to supervised learning for medical image analysis when obtaining good quality supervision for medical imaging is difficult. However, semi-SL assumes that the underlying…

Computer Vision and Pattern Recognition · Computer Science 2023-03-20 Nikhil Cherian Kurian , Varsha S , Abhijit Patil , Shashikant Khade , Amit Sethi

In this paper, we delve into semi-supervised object detection where unlabeled images are leveraged to break through the upper bound of fully-supervised object detection models. Previous semi-supervised methods based on pseudo labels are…

Computer Vision and Pattern Recognition · Computer Science 2021-03-31 Zhenyu Wang , Yali Li , Ye Guo , Lu Fang , Shengjin Wang

As deep learning methods form a critical part in commercially important applications such as autonomous driving and medical diagnostics, it is important to reliably detect out-of-distribution (OOD) inputs while employing these algorithms.…

Machine Learning · Computer Science 2018-09-12 Apoorv Vyas , Nataraj Jammalamadaka , Xia Zhu , Dipankar Das , Bharat Kaul , Theodore L. Willke

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

Unsupervised object discovery aims to localize objects in images, while removing the dependence on annotations required by most deep learning-based methods. To address this problem, we propose a fully unsupervised, bottom-up approach, for…

Computer Vision and Pattern Recognition · Computer Science 2022-12-21 Sandra Kara , Hejer Ammar , Florian Chabot , Quoc-Cuong Pham

Open-set object detection (OSOD), a task involving the detection of unknown objects while accurately detecting known objects, has recently gained attention. However, we identify a fundamental issue with the problem formulation employed in…

Computer Vision and Pattern Recognition · Computer Science 2025-12-23 Yusuke Hosoya , Masanori Suganuma , Takayuki Okatani

Passive methods for object detection and segmentation treat images of the same scene as individual samples and do not exploit object permanence across multiple views. Generalization to novel or difficult viewpoints thus requires additional…

Computer Vision and Pattern Recognition · Computer Science 2021-03-30 Zhaoyuan Fang , Ayush Jain , Gabriel Sarch , Adam W. Harley , Katerina Fragkiadaki

Out-of-distribution (OOD) detection has recently received special attention due to its critical role in safely deploying modern deep learning (DL) architectures. This work proposes a reconstruction-based multi-class OOD detector that…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Sabri Mustafa Kahya , Muhammet Sami Yavuz , Eckehard Steinbach

Predictive machine learning models generally excel on in-distribution data, but their performance degrades on out-of-distribution (OOD) inputs. Reliable deployment therefore requires robust OOD detection, yet this is particularly…

Machine Learning · Computer Science 2026-02-19 David Graber , Victor Armegioiu , Rebecca Buller , Siddhartha Mishra