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The open-vocabulary image segmentation task involves partitioning images into semantically meaningful segments and classifying them with flexible text-defined categories. The recent vision-based foundation models such as the Segment…

Computer Vision and Pattern Recognition · Computer Science 2024-06-11 Xiaoqi Wang , Wenbin He , Xiwei Xuan , Clint Sebastian , Jorge Piazentin Ono , Xin Li , Sima Behpour , Thang Doan , Liang Gou , Han Wei Shen , Liu Ren

Video Instance Segmentation (VIS) aims at segmenting and categorizing objects in videos from a closed set of training categories, lacking the generalization ability to handle novel categories in real-world videos. To address this…

Computer Vision and Pattern Recognition · Computer Science 2023-08-08 Haochen Wang , Cilin Yan , Shuai Wang , Xiaolong Jiang , XU Tang , Yao Hu , Weidi Xie , Efstratios Gavves

Open-Vocabulary Segmentation (OVS) aims to segment classes that are not present in the training dataset. However, most existing studies assume that the training data is fixed in advance, overlooking more practical scenarios where new…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Dongjun Hwang , Yejin Kim , Minyoung Lee , Seong Joon Oh , Junsuk Choe

Open-vocabulary image segmentation has been advanced through the synergy between mask generators and vision-language models like Contrastive Language-Image Pre-training (CLIP). Previous approaches focus on generating masks while aligning…

Computer Vision and Pattern Recognition · Computer Science 2025-03-13 Quan-Sheng Zeng , Yunheng Li , Daquan Zhou , Guanbin Li , Qibin Hou , Ming-Ming Cheng

Open-vocabulary semantic segmentation (OVSS) aims to segment objects from arbitrary text categories without requiring densely annotated datasets. Although contrastive learning based models enable zero-shot segmentation, they often lose fine…

Computer Vision and Pattern Recognition · Computer Science 2026-04-30 Huy Che , Vinh-Tiep Nguyen

We introduce the task of open-vocabulary 3D instance segmentation. Current approaches for 3D instance segmentation can typically only recognize object categories from a pre-defined closed set of classes that are annotated in the training…

Computer Vision and Pattern Recognition · Computer Science 2023-10-31 Ayça Takmaz , Elisabetta Fedele , Robert W. Sumner , Marc Pollefeys , Federico Tombari , Francis Engelmann

Open-vocabulary semantic segmentation (OVSS) aims to segment arbitrary category regions in images using open-vocabulary prompts, necessitating that existing methods possess pixel-level vision-language alignment capability. Typically, this…

Computer Vision and Pattern Recognition · Computer Science 2026-04-10 Jiahao Li , Yang Lu , Yachao Zhang , Fangyong Wang , Yuan Xie , Yanyun Qu

Open-vocabulary segmentation aims to identify and segment specific regions and objects based on text-based descriptions. A common solution is to leverage powerful vision-language models (VLMs), such as CLIP, to bridge the gap between vision…

Computer Vision and Pattern Recognition · Computer Science 2025-01-06 Bingyu Li , Da Zhang , Zhiyuan Zhao , Junyu Gao , Xuelong Li

Open-vocabulary semantic segmentation is a challenging task that requires segmenting novel object categories at inference time. Recent studies have explored vision-language pre-training to handle this task, but suffer from unrealistic…

Computer Vision and Pattern Recognition · Computer Science 2024-01-09 Chaofan Ma , Yuhuan Yang , Chen Ju , Fei Zhang , Ya Zhang , Yanfeng Wang

CLIP, as a vision-language model, has significantly advanced Open-Vocabulary Semantic Segmentation (OVSS) with its zero-shot capabilities. Despite its success, its application to OVSS faces challenges due to its initial image-level…

Computer Vision and Pattern Recognition · Computer Science 2024-07-12 Tong Shao , Zhuotao Tian , Hang Zhao , Jingyong Su

Open-vocabulary 3D segmentation enables exploration of 3D spaces using free-form text descriptions. Existing methods for open-vocabulary 3D instance segmentation primarily focus on identifying object-level instances but struggle with…

Computer Vision and Pattern Recognition · Computer Science 2025-01-23 Ayca Takmaz , Alexandros Delitzas , Robert W. Sumner , Francis Engelmann , Johanna Wald , Federico Tombari

Recent success of pre-trained foundation vision-language models makes Open-Vocabulary Segmentation (OVS) possible. Despite the promising performance, this approach introduces heavy computational overheads for two challenges: 1) large model…

Computer Vision and Pattern Recognition · Computer Science 2024-09-18 Jingxuan Xu , Wuyang Chen , Yao Zhao , Yunchao Wei

Existing open-world universal segmentation approaches usually leverage CLIP and pre-computed proposal masks to treat open-world segmentation tasks as proposal classification. However, 1) these works cannot handle universal segmentation in…

Computer Vision and Pattern Recognition · Computer Science 2023-03-14 Bowen Dong , Jiaxi Gu , Jianhua Han , Hang Xu , Wangmeng Zuo

Open-Vocabulary Semantic Segmentation (OVSS) assigns pixel-level labels from an open set of text-defined categories, demanding reliable generalization to unseen classes at inference. Although modern vision-language models (VLMs) support…

Computer Vision and Pattern Recognition · Computer Science 2026-03-23 Saikat Dutta , Biplab Banerjee , Hamid Rezatofighi

Event cameras, known for low-latency operation and superior performance in challenging lighting conditions, are suitable for sensitive computer vision tasks such as semantic segmentation in autonomous driving. However, challenges arise due…

Computer Vision and Pattern Recognition · Computer Science 2024-08-20 Muhammad Rameez Ur Rahman , Jhony H. Giraldo , Indro Spinelli , Stéphane Lathuilière , Fabio Galasso

Training-free open-vocabulary semantic segmentation (OVS) aims to segment images given a set of arbitrary textual categories without costly model fine-tuning. Existing solutions often explore attention mechanisms of pre-trained models, such…

Computer Vision and Pattern Recognition · Computer Science 2025-06-30 Xiwei Xuan , Ziquan Deng , Kwan-Liu Ma

In this paper, we present the One-shot In-context Part Segmentation (OIParts) framework, designed to tackle the challenges of part segmentation by leveraging visual foundation models (VFMs). Existing training-based one-shot part…

Computer Vision and Pattern Recognition · Computer Science 2025-03-04 Zhenqi Dai , Ting Liu , Xingxing Zhang , Yunchao Wei , Yanning Zhang

This paper studies open-vocabulary segmentation (OVS) through calibrating in-vocabulary and domain-biased embedding space with generalized contextual prior of CLIP. As the core of open-vocabulary understanding, alignment of visual content…

Computer Vision and Pattern Recognition · Computer Science 2024-11-27 Yong Liu , Sule Bai , Guanbin Li , Yitong Wang , Yansong Tang

CLIP (Contrastive Language-Image Pretraining) is well-developed for open-vocabulary zero-shot image-level recognition, while its applications in pixel-level tasks are less investigated, where most efforts directly adopt CLIP features…

Computer Vision and Pattern Recognition · Computer Science 2023-04-17 Jie Guo , Qimeng Wang , Yan Gao , Xiaolong Jiang , Xu Tang , Yao Hu , Baochang Zhang

In this work, we address the task of few-shot part segmentation, which aims to segment the different parts of an unseen object using very few labeled examples. It is found that leveraging the textual space of a powerful pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2023-08-25 Mengya Han , Heliang Zheng , Chaoyue Wang , Yong Luo , Han Hu , Jing Zhang , Yonggang Wen