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Segmenting images is critical for visual understanding but demands extensive pixel-level annotations. Foundational models have enabled new paradigms for predicting new classes guided by textual prompts, without annotations from the target…

Computer Vision and Pattern Recognition · Computer Science 2026-05-20 Gabriele Rosi , Fabio Cermelli , Carlo Masone , Barbara Caputo

Large vision-language models revolutionized image classification and semantic segmentation paradigms. However, they typically assume a pre-defined set of categories, or vocabulary, at test time for composing textual prompts. This assumption…

Computer Vision and Pattern Recognition · Computer Science 2024-04-18 Alessandro Conti , Enrico Fini , Massimiliano Mancini , Paolo Rota , Yiming Wang , Elisa Ricci

Semantic segmentation in videos has been a focal point of recent research. However, existing models encounter challenges when faced with unfamiliar categories. To address this, we introduce the Open Vocabulary Video Semantic Segmentation…

Multimedia · Computer Science 2024-12-13 Xinhao Li , Yun Liu , Guolei Sun , Min Wu , Le Zhang , Ce Zhu

The Diffusion Model has not only garnered noteworthy achievements in the realm of image generation but has also demonstrated its potential as an effective pretraining method utilizing unlabeled data. Drawing from the extensive potential…

Computer Vision and Pattern Recognition · Computer Science 2024-10-30 Muzhi Zhu , Yang Liu , Zekai Luo , Chenchen Jing , Hao Chen , Guangkai Xu , Xinlong Wang , Chunhua Shen

Diffusion models are generative models with impressive text-to-image synthesis capabilities and have spurred a new wave of creative methods for classical machine learning tasks. However, the best way to harness the perceptual knowledge of…

Computer Vision and Pattern Recognition · Computer Science 2024-04-02 Neehar Kondapaneni , Markus Marks , Manuel Knott , Rogerio Guimaraes , Pietro Perona

Open-vocabulary semantic segmentation aims to assign labels to every pixel in an image based on text labels. Existing approaches typically utilize vision-language models (VLMs), such as CLIP, for dense prediction. However, VLMs, pre-trained…

Computer Vision and Pattern Recognition · Computer Science 2026-01-29 Zhen Yao , Xin Li , Taotao Jing , Shuai Zhang , Mooi Choo Chuah

Fully supervised semantic segmentation learns from dense masks, which requires heavy annotation cost for closed set. In this paper, we use natural language as supervision without any pixel-level annotation for open world segmentation. We…

Computer Vision and Pattern Recognition · Computer Science 2022-12-15 Yi Li , Huifeng Yao , Hualiang Wang , Xiaomeng Li

We propose a training-free method for open-vocabulary semantic segmentation using Vision-and-Language Models (VLMs). Our approach enhances the initial per-patch predictions of VLMs through label propagation, which jointly optimizes…

Computer Vision and Pattern Recognition · Computer Science 2025-06-26 Vladan Stojnić , Yannis Kalantidis , Jiří Matas , Giorgos Tolias

Diffusion models (DMs) have become the new trend of generative models and have demonstrated a powerful ability of conditional synthesis. Among those, text-to-image diffusion models pre-trained on large-scale image-text pairs are highly…

Computer Vision and Pattern Recognition · Computer Science 2023-03-06 Wenliang Zhao , Yongming Rao , Zuyan Liu , Benlin Liu , Jie Zhou , Jiwen Lu

Open-Vocabulary Semantic Segmentation (OVSS) has advanced with recent vision-language models (VLMs), enabling segmentation beyond predefined categories through various learning schemes. Notably, training-free methods offer scalable, easily…

Computer Vision and Pattern Recognition · Computer Science 2025-04-08 Chanyoung Kim , Dayun Ju , Woojung Han , Ming-Hsuan Yang , Seong Jae Hwang

The emergence of CLIP has opened the way for open-world image perception. The zero-shot classification capabilities of the model are impressive but are harder to use for dense tasks such as image segmentation. Several methods have proposed…

Computer Vision and Pattern Recognition · Computer Science 2023-11-29 Monika Wysoczańska , Michaël Ramamonjisoa , Tomasz Trzciński , Oriane Siméoni

To bridge the gap between supervised semantic segmentation and real-world applications that acquires one model to recognize arbitrary new concepts, recent zero-shot segmentation attracts a lot of attention by exploring the relationships…

Computer Vision and Pattern Recognition · Computer Science 2022-11-01 Quande Liu , Youpeng Wen , Jianhua Han , Chunjing Xu , Hang Xu , Xiaodan Liang

The performance of image segmentation models has historically been constrained by the high cost of collecting large-scale annotated data. The Segment Anything Model (SAM) alleviates this original problem through a promptable,…

Computer Vision and Pattern Recognition · Computer Science 2026-02-04 Miguel Espinosa , Chenhongyi Yang , Linus Ericsson , Steven McDonagh , Elliot J. Crowley

Open-vocabulary image segmentation is attracting increasing attention due to its critical applications in the real world. Traditional closed-vocabulary segmentation methods are not able to characterize novel objects, whereas several recent…

Computer Vision and Pattern Recognition · Computer Science 2023-07-18 Xi Chen , Shuang Li , Ser-Nam Lim , Antonio Torralba , Hengshuang Zhao

Most recent 3D instance segmentation methods are open vocabulary, offering a greater flexibility than closed-vocabulary methods. Yet, they are limited to reasoning within a specific set of concepts, \ie the vocabulary, prompted by the user…

Computer Vision and Pattern Recognition · Computer Science 2025-03-31 Guofeng Mei , Luigi Riz , Yiming Wang , Fabio Poiesi

Open-vocabulary 3D scene understanding presents a significant challenge in the field. Recent works have sought to transfer knowledge embedded in vision-language models from 2D to 3D domains. However, these approaches often require prior…

Computer Vision and Pattern Recognition · Computer Science 2024-09-06 Hanchen Tai , Qingdong He , Jiangning Zhang , Yijie Qian , Zhenyu Zhang , Xiaobin Hu , Xiangtai Li , Yabiao Wang , Yong Liu

Recently, groundbreaking results have been presented on open-vocabulary semantic image segmentation. Such methods segment each pixel in an image into arbitrary categories provided at run-time in the form of text prompts, as opposed to a…

Robotics · Computer Science 2023-03-21 Kenneth Blomqvist , Francesco Milano , Jen Jen Chung , Lionel Ott , Roland Siegwart

Open compound domain adaptation (OCDA) is a domain adaptation setting, where target domain is modeled as a compound of multiple unknown homogeneous domains, which brings the advantage of improved generalization to unseen domains. In this…

Computer Vision and Pattern Recognition · Computer Science 2020-12-16 Rui Gong , Yuhua Chen , Danda Pani Paudel , Yawei Li , Ajad Chhatkuli , Wen Li , Dengxin Dai , Luc Van Gool

Open-vocabulary semantic segmentation enables models to segment objects or image regions beyond fixed class sets, offering flexibility in dynamic environments. However, existing methods often rely on single-view images and struggle with…

Computer Vision and Pattern Recognition · Computer Science 2026-04-20 Thomas Campagnolo , Ezio Malis , Philippe Martinet , Gaétan Bahl

Current state-of-the-art open-vocabulary segmentation methods typically rely on image-mask-text triplet annotations for supervision. However, acquiring such detailed annotations is labour-intensive and poses scalability challenges in…

Computer Vision and Pattern Recognition · Computer Science 2024-06-12 Zhaoqing Wang , Xiaobo Xia , Ziye Chen , Xiao He , Yandong Guo , Mingming Gong , Tongliang Liu