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Large Language Models (LLMs) have allowed recent LLM-based approaches to achieve excellent performance on long-video understanding benchmarks. We investigate how extensive world knowledge and strong reasoning skills of underlying LLMs…

Computer Vision and Pattern Recognition · Computer Science 2025-06-12 Kanchana Ranasinghe , Xiang Li , Kumara Kahatapitiya , Michael S. Ryoo

Long video understanding remains challenging due to its complex, diverse, and temporally scattered content. Although video large language models (Video-LLMs) can process videos lasting tens of minutes, applying them to truly long sequences…

Computer Vision and Pattern Recognition · Computer Science 2025-10-24 Yuan Sheng , Yanbin Hao , Chenxu Li , Shuo Wang , Xiangnan He

Vision-language models (VLMs) have exhibited impressive capabilities across diverse image understanding tasks, but still struggle in settings that require reasoning over extended sequences of camera frames from a video. This limits their…

Computation and Language · Computer Science 2025-12-01 Philip Schroeder , Ondrej Biza , Thomas Weng , Hongyin Luo , James Glass

Video object segmentation (VOS) is a crucial task in computer vision, but current VOS methods struggle with complex scenes and prolonged object motions. To address these challenges, the MOSE dataset aims to enhance object recognition and…

Computer Vision and Pattern Recognition · Computer Science 2024-08-30 Deshui Miao , Yameng Gu , Xin Li , Zhenyu He , Yaowei Wang , Ming-Hsuan Yang

Video Object Segmentation (VOS) task aims to segmenting a particular object instance throughout the entire video sequence given only the object mask of the first frame. Recently, Segment Anything Model 2 (SAM 2) is proposed, which is a…

Computer Vision and Pattern Recognition · Computer Science 2024-08-27 Feiyu Pan , Hao Fang , Runmin Cong , Wei Zhang , Xiankai Lu

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

We present a novel approach to unsupervised learning for video object segmentation (VOS). Unlike previous work, our formulation allows to learn dense feature representations directly in a fully convolutional regime. We rely on uniform grid…

Computer Vision and Pattern Recognition · Computer Science 2021-11-12 Nikita Araslanov , Simone Schaub-Meyer , Stefan Roth

Remote sensing visual grounding (RSVG) aims to localize objects in remote sensing images based on free-form natural language expressions. Existing approaches are typically constrained to closed-set vocabularies, limiting their applicability…

Computer Vision and Pattern Recognition · Computer Science 2025-11-12 Ke Li , Di Wang , Ting Wang , Fuyu Dong , Yiming Zhang , Luyao Zhang , Xiangyu Wang , Shaofeng Li , Quan Wang

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

Multi-modal Large Language Models (MLLMs) have demonstrated remarkable reasoning capability while lack explicit mechanisms for visual grounding and segmentation, creating a gap between cognitive reasoning and visual perception. To bridge…

Computer Vision and Pattern Recognition · Computer Science 2025-06-06 Yi Lu , Jiawang Cao , Yongliang Wu , Bozheng Li , Licheng Tang , Yangguang Ji , Chong Wu , Jay Wu , Wenbo Zhu

Referring video object segmentation (RVOS) aims to segment objects in a video according to textual descriptions, which requires the integration of multimodal information and temporal dynamics perception. The Segment Anything Model 2 (SAM 2)…

Computer Vision and Pattern Recognition · Computer Science 2025-08-11 Fu Rong , Meng Lan , Qian Zhang , Lefei Zhang

Multimodal Large Language Models (MLLMs) exhibit impressive performance across various visual tasks. Subsequent investigations into enhancing their visual reasoning abilities have significantly expanded their performance envelope. However,…

Computer Vision and Pattern Recognition · Computer Science 2025-08-08 Yang Chen , Yufan Shen , Wenxuan Huang , Sheng Zhou , Qunshu Lin , Xinyu Cai , Zhi Yu , Jiajun Bu , Botian Shi , Yu Qiao

Referring image segmentation (RIS) aims to segment an object mentioned in natural language from an image. The main challenge is text-to-pixel fine-grained correlation. In the previous methods, the final results are obtained by convolutions…

Computer Vision and Pattern Recognition · Computer Science 2024-10-15 Yichen Yan , Xingjian He , Wenxuan Wang , Sihan Chen , Jing Liu

Temporal Action Segmentation (TAS) requires dividing videos into action segments, yet the vast space of activities and alternative breakdowns makes collecting comprehensive datasets infeasible. Existing methods remain limited to closed…

Computer Vision and Pattern Recognition · Computer Science 2026-02-26 Asim Unmesh , Kaki Ramesh , Mayank Patel , Rahul Jain , Karthik Ramani

Open-vocabulary segmentation (OVS) extends the zero-shot recognition capabilities of vision-language models (VLMs) to pixel-level prediction, enabling segmentation of arbitrary categories specified by text prompts. Despite recent progress,…

Computer Vision and Pattern Recognition · Computer Science 2026-02-27 Tilemachos Aravanis , Vladan Stojnić , Bill Psomas , Nikos Komodakis , Giorgos Tolias

Remote sensing video referring object segmentation (RS-RVOS) is challenged by weak target saliency and severe visual information truncation in dynamic scenes, making it extremely difficult to maintain discriminative target representations…

Computer Vision and Pattern Recognition · Computer Science 2026-01-21 H. Jiang , Y. Sun , Z. Dong , T. Liu , Y. Gu

Reasoning segmentation aims to segment target objects in complex scenes based on human intent and spatial reasoning. While recent multimodal large language models (MLLMs) have demonstrated impressive 2D image reasoning segmentation,…

Computer Vision and Pattern Recognition · Computer Science 2025-11-11 Jiaxin Huang , Runnan Chen , Ziwen Li , Zhengqing Gao , Xiao He , Yandong Guo , Mingming Gong , Tongliang Liu

We address semi-supervised video object segmentation, the task of automatically generating accurate and consistent pixel masks for objects in a video sequence, given the first-frame ground truth annotations. Towards this goal, we present…

Computer Vision and Pattern Recognition · Computer Science 2018-11-06 Jonathon Luiten , Paul Voigtlaender , Bastian Leibe

Reference Audio-Visual Segmentation (Ref-AVS) aims to segment objects in audible videos based on multimodal cues in reference expressions. Previous methods overlook the explicit recognition of expression difficulty and dominant modality in…

Multimedia · Computer Science 2026-03-31 Yuan Zhao , Zhenqi Jia , Yongqiang Zhang

Vision Language Models (VLMs) provide rich semantic priors but are underexplored in Semi supervised Semantic Segmentation. Recent attempts to integrate VLMs to inject high level semantics overlook the semantic misalignment between visual…

Computer Vision and Pattern Recognition · Computer Science 2026-03-24 Numair Nadeem , Saeed Anwar , Muhammad Hamza Asad , Abdul Bais