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Open-vocabulary object detection (OvOD) is set to revolutionize security screening by enabling systems to recognize any item in X-ray scans. However, developing effective OvOD models for X-ray imaging presents unique challenges due to data…

Computer Vision and Pattern Recognition · Computer Science 2025-10-29 Pablo Garcia-Fernandez , Lorenzo Vaquero , Mingxuan Liu , Feng Xue , Daniel Cores , Nicu Sebe , Manuel Mucientes , Elisa Ricci

This paper presents a novel training-free framework for open-vocabulary image segmentation and object recognition (OVSR), which leverages EfficientNetB0, a convolutional neural network, for unsupervised segmentation and CLIP, a…

Computer Vision and Pattern Recognition · Computer Science 2025-10-28 Ying Dai , Wei Yu Chen

Open-vocabulary detection (OVD) is a new object detection paradigm, aiming to localize and recognize unseen objects defined by an unbounded vocabulary. This is challenging since traditional detectors can only learn from pre-defined…

Computer Vision and Pattern Recognition · Computer Science 2023-09-04 Jincheng Li , Chunyu Xie , Xiaoyu Wu , Bin Wang , Dawei Leng

Existing open-vocabulary object detectors typically enlarge their vocabulary sizes by leveraging different forms of weak supervision. This helps generalize to novel objects at inference. Two popular forms of weak-supervision used in…

Computer Vision and Pattern Recognition · Computer Science 2022-11-30 Hanoona Rasheed , Muhammad Maaz , Muhammad Uzair Khattak , Salman Khan , Fahad Shahbaz Khan

Open-vocabulary object detection (OVOD) enables models to detect any object category, including unseen ones. Benefiting from large-scale pre-training, existing OVOD methods achieve strong detection performance on general scenarios (e.g.,…

Computer Vision and Pattern Recognition · Computer Science 2026-04-07 Weihao Cao , Runqi Wang , Xiaoyue Duan , Jinchao Zhang , Ang Yang , Liping Jing

Open-vocabulary 3D object detection (OV-3DDet) aims to localize and recognize both seen and previously unseen object categories within any new 3D scene. While language and vision foundation models have achieved success in handling various…

Computer Vision and Pattern Recognition · Computer Science 2024-07-18 Pengkun Jiao , Na Zhao , Jingjing Chen , Yu-Gang Jiang

Without the demand of training in reality, humans can easily detect a known concept simply based on its language description. Empowering deep learning with this ability undoubtedly enables the neural network to handle complex vision tasks,…

Computer Vision and Pattern Recognition · Computer Science 2022-10-14 Minheng Ni , Zitong Huang , Kailai Feng , Wangmeng Zuo

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

Open-Vocabulary Segmentation (OVS) aims at segmenting images from free-form textual concepts without predefined training classes. While existing vision-language models such as CLIP can generate segmentation masks by leveraging coarse…

Computer Vision and Pattern Recognition · Computer Science 2025-09-17 Luca Barsellotti , Lorenzo Bianchi , Nicola Messina , Fabio Carrara , Marcella Cornia , Lorenzo Baraldi , Fabrizio Falchi , Rita Cucchiara

Open-vocabulary object detection (OVD) aims to scale up vocabulary size to detect objects of novel categories beyond the training vocabulary. Recent work resorts to the rich knowledge in pre-trained vision-language models. However, existing…

Computer Vision and Pattern Recognition · Computer Science 2022-11-28 Peixian Chen , Kekai Sheng , Mengdan Zhang , Mingbao Lin , Yunhang Shen , Shaohui Lin , Bo Ren , Ke Li

To address the limitations of existing open-vocabulary object recognition methods, specifically high system complexity, substantial training costs, and limited generalization, this paper proposes a novel Open-Vocabulary Object Recognition…

Computer Vision and Pattern Recognition · Computer Science 2026-03-09 Wei Yu Chen , Ying Dai

We aim at advancing open-vocabulary object detection, which detects objects described by arbitrary text inputs. The fundamental challenge is the availability of training data. It is costly to further scale up the number of classes contained…

Computer Vision and Pattern Recognition · Computer Science 2022-05-13 Xiuye Gu , Tsung-Yi Lin , Weicheng Kuo , Yin Cui

We introduce the task of open-vocabulary visual instance search (OVIS). Given an arbitrary textual search query, Open-vocabulary Visual Instance Search (OVIS) aims to return a ranked list of visual instances, i.e., image patches, that…

Computer Vision and Pattern Recognition · Computer Science 2021-08-10 Sheng Liu , Kevin Lin , Lijuan Wang , Junsong Yuan , Zicheng Liu

Open-Vocabulary Object Detection (OVOD) aims to detect novel objects beyond a given set of base categories on which the detection model is trained. Recent OVOD methods focus on adapting the image-level pre-trained vision-language models…

Computer Vision and Pattern Recognition · Computer Science 2023-12-20 Ruohuan Fang , Guansong Pang , Xiao Bai

Current methods aggregate multi-level features or introduce edge and skeleton to get more refined saliency maps. However, little attention is paid to how to obtain the complete salient object in cluttered background, where the targets are…

Computer Vision and Pattern Recognition · Computer Science 2023-01-19 Ge Zhu , Jinbao Li , Yahong Guo

Open World Object Detection(OWOD) addresses realistic scenarios where unseen object classes emerge, enabling detectors trained on known classes to detect unknown objects and incrementally incorporate the knowledge they provide. While…

Computer Vision and Pattern Recognition · Computer Science 2025-12-23 Sunoh Lee , Minsik Jeon , Jihong Min , Junwon Seo

Zero-shot out-of-vocabulary detection (ZS-OOVD) aims to accurately recognize objects of in-vocabulary (IV) categories provided at zero-shot inference, while simultaneously rejecting undefined ones (out-of-vocabulary, OOV) that lack…

Computer Vision and Pattern Recognition · Computer Science 2026-02-02 Binyi Su , Chenghao Huang , Haiyong Chen

Semantic segmentation is a fundamental task in visual scene understanding. We focus on the supervised setting, where ground-truth semantic annotations are available. Based on knowledge about the high regularity of real-world scenes, we…

Computer Vision and Pattern Recognition · Computer Science 2023-11-16 Stamatis Alexandropoulos , Christos Sakaridis , Petros Maragos

Fine-grained open-vocabulary object detection (FG-OVD) aims to detect novel object categories described by attribute-rich texts. While existing open-vocabulary detectors show promise at the base-category level, they underperform in…

Computer Vision and Pattern Recognition · Computer Science 2026-03-31 Jiaming Li , Zhijia Liang , Weikai Chen , Lin Ma , Guanbin Li

In recent years, deep neural networks (DNNs) have gained widespread adoption for continuous mobile object detection (OD) tasks, particularly in autonomous systems. However, a prevalent issue in their deployment is the one-size-fits-all…

Machine Learning · Computer Science 2024-04-30 Justin Davis , Mehmet E. Belviranli