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Open-vocabulary semantic segmentation enables models to identify novel object categories beyond their training data. While this flexibility represents a significant advancement, current approaches still rely on manually specified class…

Computer Vision and Pattern Recognition · Computer Science 2025-02-18 Klara Reichard , Giulia Rizzoli , Stefano Gasperini , Lukas Hoyer , Pietro Zanuttigh , Nassir Navab , Federico Tombari

Contrastive language-image pretraining (CLIP) using image-text pairs has achieved impressive results on image classification in both zero-shot and transfer learning settings. However, we show that directly applying such models to recognize…

Computer Vision and Pattern Recognition · Computer Science 2021-12-17 Yiwu Zhong , Jianwei Yang , Pengchuan Zhang , Chunyuan Li , Noel Codella , Liunian Harold Li , Luowei Zhou , Xiyang Dai , Lu Yuan , Yin Li , Jianfeng Gao

While Contrastive Language-Image Pre-training (CLIP) has advanced open-vocabulary predictions, its performance on semantic segmentation remains suboptimal. This shortfall primarily stems from its spatial-invariant semantic features and…

Computer Vision and Pattern Recognition · Computer Science 2024-11-15 Yuheng Shi , Minjing Dong , Chang Xu

Despite the remarkable accuracy of deep neural networks in object detection, they are costly to train and scale due to supervision requirements. Particularly, learning more object categories typically requires proportionally more bounding…

Computer Vision and Pattern Recognition · Computer Science 2021-03-16 Alireza Zareian , Kevin Dela Rosa , Derek Hao Hu , Shih-Fu Chang

Open vocabulary object detection has been greatly advanced by the recent development of vision-language pretrained model, which helps recognize novel objects with only semantic categories. The prior works mainly focus on knowledge…

Computer Vision and Pattern Recognition · Computer Science 2026-05-18 Tao Wang , Nan Li

Image segmentation beyond predefined categories is a key challenge in remote sensing, where novel and unseen classes often emerge during inference. Open-vocabulary image Segmentation addresses these generalization issues in traditional…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 Saikat Dutta , Akhil Vasim , Siddhant Gole , Hamid Rezatofighi , Biplab Banerjee

Owing to large-scale image-text contrastive training, pre-trained vision language model (VLM) like CLIP shows superior open-vocabulary recognition ability. Most existing open-vocabulary object detectors attempt to utilize the pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2025-03-07 Xiangyu Gao , Yu Dai , Benliu Qiu , Lanxiao Wang , Heqian Qiu , Hongliang Li

Safe autonomous systems in complex environments require robust road anomaly segmentation to identify unknown obstacles. However, existing approaches often rely on pixel-level statistics to determine whether a region appears anomalous. This…

Computer Vision and Pattern Recognition · Computer Science 2026-03-03 Zhuolin He , Jiacheng Tang , Jian Pu , Xiangyang Xue

To identify objects beyond predefined categories, open-vocabulary aerial object detection (OVAD) leverages the zero-shot capabilities of visual-language models (VLMs) to generalize from base to novel categories. Existing approaches…

Computer Vision and Pattern Recognition · Computer Science 2025-11-25 Jianhang Yao , Yongbin Zheng , Siqi Lu , Wanying Xu , Peng Sun

Open-vocabulary object detection (OVOD) enables models to recognize objects beyond predefined categories, but existing approaches remain limited in practical deployment. On the one hand, multimodal designs often incur substantial…

Computer Vision and Pattern Recognition · Computer Science 2026-05-14 Siheng Wang , Yanshu Li , Bohan Hu , Zhengdao Li , Haibo Zhan , Linshan Li , Weiming Liu , Ruizhi Qian , Guangxin Wu , Hao Zhang , Jifeng Shen , Piotr Koniusz , Zhengtao Yao , Junhao Dong , Qiang Sun

Amodal panoptic segmentation aims to connect the perception of the world to its cognitive understanding. It entails simultaneously predicting the semantic labels of visible scene regions and the entire shape of traffic participant…

Computer Vision and Pattern Recognition · Computer Science 2022-05-31 Rohit Mohan , Abhinav Valada

Recently, pre-trained vision-language models have been increasingly used to tackle the challenging zero-shot segmentation task. Typical solutions follow the paradigm of first generating mask proposals and then adopting CLIP to classify…

Computer Vision and Pattern Recognition · Computer Science 2023-10-03 Siyu Jiao , Yunchao Wei , Yaowei Wang , Yao Zhao , Humphrey Shi

The goal of this paper is open-vocabulary object detection (OVOD) $\unicode{x2013}$ building a model that can detect objects beyond the set of categories seen at training, thus enabling the user to specify categories of interest at…

Computer Vision and Pattern Recognition · Computer Science 2023-06-12 Prannay Kaul , Weidi Xie , Andrew Zisserman

Traditional object detection models are typically trained on a fixed set of classes, limiting their flexibility and making it costly to incorporate new categories. Open-vocabulary object detection addresses this limitation by enabling…

Computer Vision and Pattern Recognition · Computer Science 2025-10-07 Jyoti Kini , Rohit Gupta , Mubarak Shah

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

Open-vocabulary image segmentation aims to partition an image into semantic regions according to arbitrary text descriptions. However, complex visual scenes can be naturally decomposed into simpler parts and abstracted at multiple levels of…

Computer Vision and Pattern Recognition · Computer Science 2023-12-22 Xudong Wang , Shufan Li , Konstantinos Kallidromitis , Yusuke Kato , Kazuki Kozuka , Trevor Darrell

Open-vocabulary image semantic segmentation (OVS) seeks to segment images into semantic regions across an open set of categories. Existing OVS methods commonly depend on foundational vision-language models and utilize similarity computation…

Computer Vision and Pattern Recognition · Computer Science 2024-09-13 Qinglong Cao , Yuntian Chen , Chao Ma , Xiaokang Yang

Most existing remote sensing instance segmentation approaches are designed for close-vocabulary prediction, limiting their ability to recognize novel categories or generalize across datasets. This restricts their applicability in diverse…

Computer Vision and Pattern Recognition · Computer Science 2025-07-30 Shiqi Huang , Shuting He , Huaiyuan Qin , Bihan Wen

It is widely agreed that open-vocabulary-based approaches outperform classical closed-set training solutions for recognizing unseen objects in images for semantic segmentation. Existing open-vocabulary approaches leverage vision-language…

Computer Vision and Pattern Recognition · Computer Science 2026-02-19 Huadong Tang , Youpeng Zhao , Yan Huang , Min Xu , Jun Wang , Qiang Wu

Open-vocabulary segmentation is the task of segmenting anything that can be named in an image. Recently, large-scale vision-language modelling has led to significant advances in open-vocabulary segmentation, but at the cost of gargantuan…

Computer Vision and Pattern Recognition · Computer Science 2024-10-01 Laurynas Karazija , Iro Laina , Andrea Vedaldi , Christian Rupprecht