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The remarkable zero-shot reasoning capabilities of large-scale Visual Language Models (VLMs) on static images have yet to be fully translated to the video domain. Conventional video understanding models often rely on extensive,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-14 Shihao Ji , Zihui Song

Recent advances in Vision Language Models (VLMs) and Vision Foundation Models (VFMs) have opened new opportunities for zero-shot text-guided segmentation of remote sensing imagery. However, most existing approaches still rely on additional…

Computer Vision and Pattern Recognition · Computer Science 2026-02-23 Jose Sosa , Danila Rukhovich , Anis Kacem , Djamila Aouada

Zero-shot classification capabilities naturally arise in models trained within a vision-language contrastive framework. Despite their classification prowess, these models struggle in dense tasks like zero-shot open-vocabulary segmentation.…

Computer Vision and Pattern Recognition · Computer Science 2025-10-16 Thomas Stegmüller , Tim Lebailly , Nikola Dukic , Behzad Bozorgtabar , Tinne Tuytelaars , Jean-Philippe Thiran

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 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

Segmenting and recognizing diverse object parts is a crucial ability in applications spanning various computer vision and robotic tasks. While significant progress has been made in object-level Open-Vocabulary Semantic Segmentation (OVSS),…

Computer Vision and Pattern Recognition · Computer Science 2023-10-10 Meng Wei , Xiaoyu Yue , Wenwei Zhang , Shu Kong , Xihui Liu , Jiangmiao Pang

Video temporal grounding aims to identify video segments within untrimmed videos that are most relevant to a given natural language query. Existing video temporal localization models rely on specific datasets for training and have high data…

Computer Vision and Pattern Recognition · Computer Science 2024-08-30 Minghang Zheng , Xinhao Cai , Qingchao Chen , Yuxin Peng , Yang Liu

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

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 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

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

We introduce the first zero-shot approach for Video Semantic Segmentation (VSS) based on pre-trained diffusion models. A growing research direction attempts to employ diffusion models to perform downstream vision tasks by exploiting their…

Computer Vision and Pattern Recognition · Computer Science 2024-05-28 Qian Wang , Abdelrahman Eldesokey , Mohit Mendiratta , Fangneng Zhan , Adam Kortylewski , Christian Theobalt , Peter Wonka

Accurate video moment retrieval (VMR) requires universal visual-textual correlations that can handle unknown vocabulary and unseen scenes. However, the learned correlations are likely either biased when derived from a limited amount of…

Computer Vision and Pattern Recognition · Computer Science 2023-09-06 Dezhao Luo , Jiabo Huang , Shaogang Gong , Hailin Jin , Yang Liu

Open-vocabulary semantic segmentation (OVSS) conducts pixel-level classification via text-driven alignment, where the domain discrepancy between base category training and open-vocabulary inference poses challenges in discriminative…

Computer Vision and Pattern Recognition · Computer Science 2025-09-04 Jiahao Li , Yang Lu , Yachao Zhang , Fangyong Wang , Yuan Xie , Yanyun Qu

Spatio-temporal action detection (STAD) is an important fine-grained video understanding task. Current methods require box and label supervision for all action classes in advance. However, in real-world applications, it is very likely to…

Computer Vision and Pattern Recognition · Computer Science 2024-05-20 Tao Wu , Shuqiu Ge , Jie Qin , Gangshan Wu , Limin Wang

Recently, test-time adaptation has attracted wide interest in the context of vision-language models for image classification. However, to the best of our knowledge, the problem is completely overlooked in dense prediction tasks such as…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Mehrdad Noori , David Osowiechi , Gustavo Adolfo Vargas Hakim , Ali Bahri , Moslem Yazdanpanah , Sahar Dastani , Farzad Beizaee , Ismail Ben Ayed , Christian Desrosiers

Open-Vocabulary Temporal Action Localization (OVTAL) enables a model to recognize any desired action category in videos without the need to explicitly curate training data for all categories. However, this flexibility poses significant…

Computer Vision and Pattern Recognition · Computer Science 2024-06-25 Akshita Gupta , Aditya Arora , Sanath Narayan , Salman Khan , Fahad Shahbaz Khan , Graham W. Taylor

From image-text pairs, large-scale vision-language models (VLMs) learn to implicitly associate image regions with words, which prove effective for tasks like visual question answering. However, leveraging the learned association for…

Computer Vision and Pattern Recognition · Computer Science 2024-06-18 Jiayun Luo , Siddhesh Khandelwal , Leonid Sigal , Boyang Li

Temporal action segmentation (TAS) in videos aims at densely identifying video frames in minutes-long videos with multiple action classes. As a long-range video understanding task, researchers have developed an extended collection of…

Computer Vision and Pattern Recognition · Computer Science 2023-10-24 Guodong Ding , Fadime Sener , Angela Yao

Action detection aims to detect (recognize and localize) human actions spatially and temporally in videos. Existing approaches focus on the closed-set setting where an action detector is trained and tested on videos from a fixed set of…

Computer Vision and Pattern Recognition · Computer Science 2024-11-19 Wentao Bao , Kai Li , Yuxiao Chen , Deep Patel , Martin Renqiang Min , Yu Kong