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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

In this paper, we consider the problem of open-vocabulary semantic segmentation (OVS), which aims to segment objects of arbitrary classes instead of pre-defined, closed-set categories. The main contributions are as follows: First, we…

Computer Vision and Pattern Recognition · Computer Science 2023-03-06 Jilan Xu , Junlin Hou , Yuejie Zhang , Rui Feng , Yi Wang , Yu Qiao , Weidi Xie

Understanding 3D scenes in open-world settings poses fundamental challenges for vision and robotics, particularly due to the limitations of closed-vocabulary supervision and static annotations. To address this, we propose a unified…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Fei Yu , Quan Deng , Shengeng Tang , Yuehua Li , Lechao Cheng

Modern diffusion-based image generative models have made significant progress and become promising to enrich training data for the object detection task. However, the generation quality and the controllability for complex scenes containing…

Computer Vision and Pattern Recognition · Computer Science 2024-11-07 Jingyuan Zhu , Shiyu Li , Yuxuan Liu , Ping Huang , Jiulong Shan , Huimin Ma , Jian Yuan

Open-vocabulary object detection (OVD) aims to recognize and localize object categories beyond the training set. Recent approaches leverage vision-language models to generate pseudo-labels using image-text alignment, allowing detectors to…

Computer Vision and Pattern Recognition · Computer Science 2026-03-19 Hojun Choi , Youngsun Lim , Jaeyo Shin , Hyunjung Shim

Unmanned aerial vehicle (UAV) based object detection is a critical but challenging task, when applied in dynamically changing scenarios with limited annotated training data. Layout-to-image generation approaches have proved effective in…

Computer Vision and Pattern Recognition · Computer Science 2026-04-06 Wenhao Li , Zimeng Wu , Yu Wu , Zehua Fu , Jiaxin Chen

Open-vocabulary object detection (OVOD) aims to detect both seen and unseen categories, yet existing methods often struggle to generalize to novel objects due to limited integration of global and local contextual cues. We propose…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Soichiro Okazaki , Tatsuya Sasaki , Hiroki Ohashi

We present Region-aware Open-vocabulary Vision Transformers (RO-ViT) - a contrastive image-text pretraining recipe to bridge the gap between image-level pretraining and open-vocabulary object detection. At the pretraining phase, we propose…

Computer Vision and Pattern Recognition · Computer Science 2023-08-29 Dahun Kim , Anelia Angelova , Weicheng Kuo

Open-vocabulary object detection (OVD) has been studied with Vision-Language Models (VLMs) to detect novel objects beyond the pre-trained categories. Previous approaches improve the generalization ability to expand the knowledge of the…

Computer Vision and Pattern Recognition · Computer Science 2024-04-09 Jooyeon Kim , Eulrang Cho , Sehyung Kim , Hyunwoo J. Kim

Open-vocabulary 3D object detection has recently attracted considerable attention due to its broad applications in autonomous driving and robotics, which aims to effectively recognize novel classes in previously unseen domains. However,…

Computer Vision and Pattern Recognition · Computer Science 2024-11-26 Rui Huang , Henry Zheng , Yan Wang , Zhuofan Xia , Marco Pavone , Gao Huang

Vision language models (VLMs) have experienced rapid advancements through the integration of large language models (LLMs) with image-text pairs, yet they struggle with detailed regional visual understanding due to limited spatial awareness…

Computer Vision and Pattern Recognition · Computer Science 2024-03-05 Qiushan Guo , Shalini De Mello , Hongxu Yin , Wonmin Byeon , Ka Chun Cheung , Yizhou Yu , Ping Luo , Sifei Liu

Vision-language modeling has enabled open-vocabulary tasks where predictions can be queried using any text prompt in a zero-shot manner. Existing open-vocabulary tasks focus on object classes, whereas research on object attributes is…

Computer Vision and Pattern Recognition · Computer Science 2023-03-10 María A. Bravo , Sudhanshu Mittal , Simon Ging , Thomas Brox

Change detection is a fundamental task in remote sensing, aiming to quantify the impacts of human activities and ecological dynamics on land-cover changes. Existing change detection methods are limited to predefined classes in training…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 You Su , Yonghong Song , Jingqi Chen , Zehan Wen

Open-vocabulary object detection (OVOD) aims to detect known and unknown objects in the open world by leveraging text prompts. Benefiting from the emergence of large-scale vision--language pre-trained models, OVOD has demonstrated strong…

Computer Vision and Pattern Recognition · Computer Science 2026-03-30 Jiaming Liang , Yifeng Zhan , Chunlin Liu , Weihua Zheng , Bingye Peng , Qiwei Liang , Boyang Cai , Xiaochun Mai , Qiang Nie

Building robust and generic object detection frameworks requires scaling to larger label spaces and bigger training datasets. However, it is prohibitively costly to acquire annotations for thousands of categories at a large scale. We…

Computer Vision and Pattern Recognition · Computer Science 2022-07-20 Shiyu Zhao , Zhixing Zhang , Samuel Schulter , Long Zhao , Vijay Kumar B. G , Anastasis Stathopoulos , Manmohan Chandraker , Dimitris Metaxas

Inspired by the outstanding zero-shot capability of vision language models (VLMs) in image classification tasks, open-vocabulary object detection has attracted increasing interest by distilling the broad VLM knowledge into detector…

Computer Vision and Pattern Recognition · Computer Science 2024-02-08 Sheng Jin , Xueying Jiang , Jiaxing Huang , Lewei Lu , Shijian Lu

Online construction of open-ended language scenes is crucial for robotic applications, where open-vocabulary interactive scene understanding is required. Recently, neural implicit representation has provided a promising direction for online…

Computer Vision and Pattern Recognition · Computer Science 2025-04-22 Muer Tie , Julong Wei , Zhengjun Wang , Ke Wu , Shansuai Yuan , Kaizhao Zhang , Jie Jia , Jieru Zhao , Zhongxue Gan , Wenchao Ding

Scene graph generation (SGG) is a fundamental task aimed at detecting visual relations between objects in an image. The prevailing SGG methods require all object classes to be given in the training set. Such a closed setting limits the…

Computer Vision and Pattern Recognition · Computer Science 2022-10-17 Tao He , Lianli Gao , Jingkuan Song , Yuan-Fang Li

Vision-language models (VLMs) excel in visual understanding but often lack reliable grounding capabilities and actionable inference rates. Integrating them with open-vocabulary object detection (OVD), instance segmentation, and tracking…

Computer Vision and Pattern Recognition · Computer Science 2025-10-21 Bastian Pätzold , Jan Nogga , Sven Behnke

This paper addresses the challenging problem of open-vocabulary object detection (OVOD) where an object detector must identify both seen and unseen classes in test images without labeled examples of the unseen classes in training. A typical…

Computer Vision and Pattern Recognition · Computer Science 2024-06-04 Chau Pham , Truong Vu , Khoi Nguyen