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Pre-trained vision-language models (VLMs) have enabled significant progress in open vocabulary computer vision tasks such as image classification, object detection and image segmentation. Some recent works have focused on extending VLMs to…

Computer Vision and Pattern Recognition · Computer Science 2025-10-14 Rohit Gupta , Mamshad Nayeem Rizve , Jayakrishnan Unnikrishnan , Ashish Tawari , Son Tran , Mubarak Shah , Benjamin Yao , Trishul Chilimbi

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

Recently, a few open-vocabulary methods have been proposed by employing a unified architecture to tackle generic segmentation and detection tasks. However, their performance still lags behind the task-specific models due to the conflict…

Computer Vision and Pattern Recognition · Computer Science 2023-12-13 Shuai Li , Minghan Li , Pengfei Wang , Lei Zhang

Despite the significant progress in deep learning for dense visual recognition problems, such as semantic segmentation, traditional methods are constrained by fixed class sets. Meanwhile, vision-language foundation models, such as CLIP,…

Computer Vision and Pattern Recognition · Computer Science 2024-09-18 Sina Hajimiri , Ismail Ben Ayed , Jose Dolz

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

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

A key benefit of deep vision-language models such as CLIP is that they enable zero-shot open vocabulary classification; the user has the ability to define novel class labels via natural language prompts at inference time. However, while…

Computer Vision and Pattern Recognition · Computer Science 2024-01-05 A K Nirala , A Joshi , C Hegde , S Sarkar

Open-vocabulary segmentation is a challenging task requiring segmenting and recognizing objects from an open set of categories. One way to address this challenge is to leverage multi-modal models, such as CLIP, to provide image and text…

Computer Vision and Pattern Recognition · Computer Science 2023-11-16 Qihang Yu , Ju He , Xueqing Deng , Xiaohui Shen , Liang-Chieh Chen

Open-vocabulary semantic segmentation (OVSS) employs pixel-level vision-language alignment to associate category-related prompts with corresponding pixels. A key challenge is enhancing the multimodal dense prediction capability,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-21 Jiahao Li , Yang Lu , Yachao Zhang , Yong Xie , Fangyong Wang , Yuan Xie , Yanyun Qu

Open-vocabulary part segmentation (OVPS) is an emerging research area focused on segmenting fine-grained entities using diverse and previously unseen vocabularies. Our study highlights the inherent complexities of part segmentation due to…

Computer Vision and Pattern Recognition · Computer Science 2024-12-09 Jiho Choi , Seonho Lee , Seungho Lee , Minhyun Lee , Hyunjung Shim

Open-Vocabulary Video Instance Segmentation (VIS) is attracting increasing attention due to its ability to segment and track arbitrary objects. However, the recent Open-Vocabulary VIS attempts obtained unsatisfactory results, especially in…

Computer Vision and Pattern Recognition · Computer Science 2024-07-15 Hao Fang , Peng Wu , Yawei Li , Xinxin Zhang , Xiankai Lu

Benefiting from the inductive biases learned from large-scale datasets, open-vocabulary semantic segmentation (OVSS) leverages the power of vision-language models, such as CLIP, to achieve remarkable progress without requiring task-specific…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Qiming Huang , Hao Ai , Jianbo Jiao

Open-Vocabulary Segmentation (OVS) methods are capable of performing semantic segmentation without relying on a fixed vocabulary, and in some cases, without training or fine-tuning. However, OVS methods typically require a human in the loop…

Computer Vision and Pattern Recognition · Computer Science 2025-03-13 Osman Ülger , Maksymilian Kulicki , Yuki Asano , Martin R. Oswald

Open-Vocabulary Segmentation (OVS) has drawn increasing attention for its capacity to generalize segmentation beyond predefined categories. However, existing methods typically predict segmentation masks with simple forward inference,…

Computer Vision and Pattern Recognition · Computer Science 2025-08-04 Zongyan Han , Jiale Cao , Shuo Chen , Tong Wang , Jorma Laaksonen , Rao Muhammad Anwer

Open-vocabulary panoptic segmentation remains hindered by two coupled issues: (i) mask selection bias, where objectness heads trained on closed vocabularies suppress masks of categories not observed in training, and (ii) limited regional…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Nikolay Kormushev , Josip Šarić , Matej Kristan

Recent state-of-the-art semi-supervised Video Object Segmentation (VOS) methods have shown significant improvements in target object segmentation accuracy when information from preceding frames is used in segmenting the current frame. In…

Computer Vision and Pattern Recognition · Computer Science 2024-02-15 Amir Nazemi , Mohammad Javad Shafiee , Zahra Gharaee , Paul Fieguth

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 Segmentation (OVS) aims to segment image regions beyond predefined category sets by leveraging semantic descriptions. While CLIP based approaches excel in semantic generalization, they frequently lack the fine-grained…

Computer Vision and Pattern Recognition · Computer Science 2026-04-10 Haoxi Zeng , Qiankun Liu , Yi Bin , Haiyue Zhang , Yujuan Ding , Guoqing Wang , Deqiang Ouyang , Heng Tao Shen

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

Recent advances in foundational Vision Language Models (VLMs) have reshaped the evaluation paradigm in computer vision tasks. These foundational models, especially CLIP, have accelerated research in open-vocabulary computer vision tasks,…

Computer Vision and Pattern Recognition · Computer Science 2025-04-15 M. Arda Aydın , Efe Mert Çırpar , Elvin Abdinli , Gozde Unal , Yusuf H. Sahin