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State-of-the-art Object Detection (OD) methods predominantly operate under a closed-world assumption, where test-time categories match those encountered during training. However, detecting and localizing unknown objects is crucial for…

Computer Vision and Pattern Recognition · Computer Science 2025-06-18 Daniel Montoya , Aymen Bouguerra , Alexandra Gomez-Villa , Fabio Arnez

Traditional object detection models are constrained by the limitations of closed-set datasets, detecting only categories encountered during training. While multimodal models have extended category recognition by aligning text and image…

Computer Vision and Pattern Recognition · Computer Science 2024-12-31 Lihao Liu , Juexiao Feng , Hui Chen , Ao Wang , Lin Song , Jungong Han , Guiguang Ding

We address the task of open-world class-agnostic object detection, i.e., detecting every object in an image by learning from a limited number of base object classes. State-of-the-art RGB-based models suffer from overfitting the training…

Computer Vision and Pattern Recognition · Computer Science 2023-02-06 Haiwen Huang , Andreas Geiger , Dan Zhang

Tracking and detecting any object, including ones never-seen-before during model training, is a crucial but elusive capability of autonomous systems. An autonomous agent that is blind to never-seen-before objects poses a safety hazard when…

Computer Vision and Pattern Recognition · Computer Science 2022-03-30 Yang Liu , Idil Esen Zulfikar , Jonathon Luiten , Achal Dave , Deva Ramanan , Bastian Leibe , Aljoša Ošep , Laura Leal-Taixé

Out-of-distribution (OOD) object detection is a critical task focused on detecting objects that originate from a data distribution different from that of the training data. In this study, we investigate to what extent state-of-the-art…

Computer Vision and Pattern Recognition · Computer Science 2024-08-22 Sadia Ilyas , Ido Freeman , Matthias Rottmann

Object detectors are typically trained once and for all on a fixed set of classes. However, this closed-world assumption is unrealistic in practice, as new classes will inevitably emerge after the detector is deployed in the wild. In this…

Computer Vision and Pattern Recognition · Computer Science 2024-05-01 Tyler L. Hayes , César R. de Souza , Namil Kim , Jiwon Kim , Riccardo Volpi , Diane Larlus

Existing 3D object detectors encounter extreme challenges in localizing unseen 3D objects and recognizing them as unseen, which is a crucial technology in autonomous driving in the wild. To address these challenges, we propose practical…

Computer Vision and Pattern Recognition · Computer Science 2025-05-28 Hyunjun Choi , Daeho Um , Hawook Jeong

Modern object detectors have achieved impressive progress under the close-set setup. However, open-set object detection (OSOD) remains challenging since objects of unknown categories are often misclassified to existing known classes. In…

Computer Vision and Pattern Recognition · Computer Science 2022-05-10 Jiaming Han , Yuqiang Ren , Jian Ding , Xingjia Pan , Ke Yan , Gui-Song Xia

Unknown Object Detection (UOD) aims to identify objects of unseen categories, differing from the traditional detection paradigm limited by the closed-world assumption. A key component of UOD is learning a generalized representation, i.e.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-16 Haomiao Liu , Hao Xu , Chuhuai Yue , Bo Ma

Few-shot Open-set Object Detection (FOOD) poses a challenge in many open-world scenarios. It aims to train an open-set detector to detect known objects while rejecting unknowns with scarce training samples. Existing FOOD methods are subject…

Computer Vision and Pattern Recognition · Computer Science 2025-05-22 Zhaowei Wu , Binyi Su , Qichuan Geng , Hua Zhang , Zhong Zhou

Despite great progress in object detection, most existing methods work only on a limited set of object categories, due to the tremendous human effort needed for bounding-box annotations of training data. To alleviate the problem, recent…

Computer Vision and Pattern Recognition · Computer Science 2022-07-14 Mingfei Gao , Chen Xing , Juan Carlos Niebles , Junnan Li , Ran Xu , Wenhao Liu , Caiming Xiong

3D object detection plays a crucial role in autonomous systems, yet existing methods are limited by closed-set assumptions and struggle to recognize novel objects and their attributes in real-world scenarios. We propose OVODA, a novel…

Computer Vision and Pattern Recognition · Computer Science 2025-08-26 Xinhao Xiang , Kuan-Chuan Peng , Suhas Lohit , Michael J. Jones , Jiawei Zhang

Recent developments for Semi-Supervised Object Detection (SSOD) have shown the promise of leveraging unlabeled data to improve an object detector. However, thus far these methods have assumed that the unlabeled data does not contain…

Computer Vision and Pattern Recognition · Computer Science 2022-08-30 Yen-Cheng Liu , Chih-Yao Ma , Xiaoliang Dai , Junjiao Tian , Peter Vajda , Zijian He , Zsolt Kira

Autonomous systems rely on accurate 3D object detection from LiDAR data, yet most detectors are limited to a predefined set of known classes, making them vulnerable to unexpected out-of-distribution (OOD) objects. In this work, we present…

Computer Vision and Pattern Recognition · Computer Science 2025-09-16 Louis Soum-Fontez , Jean-Emmanuel Deschaud , François Goulette

Open world object detection aims at detecting objects that are absent in the object classes of the training data as unknown objects without explicit supervision. Furthermore, the exact classes of the unknown objects must be identified…

Computer Vision and Pattern Recognition · Computer Science 2022-12-07 Na Dong , Yongqiang Zhang , Mingli Ding , Gim Hee Lee

Traditional semi-supervised object detection methods assume a fixed set of object classes (in-distribution or ID classes) during training and deployment, which limits performance in real-world scenarios where unseen classes…

Computer Vision and Pattern Recognition · Computer Science 2024-11-05 Garvita Allabadi , Ana Lucic , Siddarth Aananth , Tiffany Yang , Yu-Xiong Wang , Vikram Adve

We show that classifiers trained with random region proposals achieve state-of-the-art Open-world Object Detection (OWOD): they can not only maintain the accuracy of the known objects (w/ training labels), but also considerably improve the…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Yanghao Wang , Zhongqi Yue , Xian-Sheng Hua , Hanwang Zhang

This paper addresses the significant challenge in open-set object detection (OSOD): the tendency of state-of-the-art detectors to erroneously classify unknown objects as known categories with high confidence. We present a novel approach…

Computer Vision and Pattern Recognition · Computer Science 2024-01-22 Prakash Mallick , Feras Dayoub , Jamie Sherrah

Current closed-set instance segmentation models rely on pre-defined class labels for each mask during training and evaluation, largely limiting their ability to detect novel objects. Open-world instance segmentation (OWIS) models address…

Computer Vision and Pattern Recognition · Computer Science 2023-08-15 Muzhi Zhu , Hengtao Li , Hao Chen , Chengxiang Fan , Weian Mao , Chenchen Jing , Yifan Liu , Chunhua Shen

Traditional object detection answers two questions; "what" (what the object is?) and "where" (where the object is?). "what" part of the object detection can be fine-grained further i.e. "what type", "what shape" and "what material" etc.…

Computer Vision and Pattern Recognition · Computer Science 2022-04-20 Addel Zafar , Umar Khalid