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The difficulty of the fine-grained image classification mainly comes from a shared overall appearance across classes. Thus, recognizing discriminative details, such as eyes and beaks for birds, is a key in the task. However, this is…

Computer Vision and Pattern Recognition · Computer Science 2023-08-02 SuBeen Lee , WonJun Moon , Hyun Seok Seong , Jae-Pil Heo

Long video understanding remains a fundamental challenge for multimodal large language models (MLLMs), particularly in tasks requiring precise temporal reasoning and event localization. Existing approaches typically adopt uniform frame…

Computer Vision and Pattern Recognition · Computer Science 2025-09-12 Chao Yuan , Yang Yang , Yehui Yang , Zach Cheng

In this paper, we consider the problem of temporal action localization under low-shot (zero-shot & few-shot) scenario, with the goal of detecting and classifying the action instances from arbitrary categories within some untrimmed videos,…

Computer Vision and Pattern Recognition · Computer Science 2023-03-22 Chen Ju , Zeqian Li , Peisen Zhao , Ya Zhang , Xiaopeng Zhang , Qi Tian , Yanfeng Wang , Weidi Xie

This paper introduces Stereo Any Video, a powerful framework for video stereo matching. It can estimate spatially accurate and temporally consistent disparities without relying on auxiliary information such as camera poses or optical flow.…

Computer Vision and Pattern Recognition · Computer Science 2025-07-22 Junpeng Jing , Weixun Luo , Ye Mao , Krystian Mikolajczyk

Multi-task and few-shot time series forecasting tasks are commonly encountered in scenarios such as the launch of new products in different cities. However, traditional time series forecasting methods suffer from insufficient historical…

Machine Learning · Computer Science 2025-06-25 Pengpeng Ouyang , Dong Chen , Tong Yang , Shuo Feng , Zhao Jin , Mingliang Xu

Current state-of-the-art human action recognition is focused on the classification of temporally trimmed videos in which only one action occurs per frame. In this work we address the problem of action localisation and instance segmentation…

Computer Vision and Pattern Recognition · Computer Science 2017-08-08 Suman Saha , Gurkirt Singh , Michael Sapienza , Philip H. S. Torr , Fabio Cuzzolin

Few-shot learning (FSL) enables object detection models to recognize novel classes given only a few annotated examples, thereby reducing expensive manual data labeling. This survey examines recent FSL advances for video and 3D object…

Computer Vision and Pattern Recognition · Computer Science 2025-07-24 Md Meftahul Ferdaus , Kendall N. Niles , Joe Tom , Mahdi Abdelguerfi , Elias Ioup

Temporal action localization is an important step towards video understanding. Most current action localization methods depend on untrimmed videos with full temporal annotations of action instances. However, it is expensive and…

Computer Vision and Pattern Recognition · Computer Science 2020-01-23 Ashraful Islam , Richard J. Radke

Despite the significant progress made by deep learning in natural image matting, there has been so far no representative work on deep learning for video matting due to the inherent technical challenges in reasoning temporal domain and lack…

Computer Vision and Pattern Recognition · Computer Science 2021-04-23 Yanan Sun , Guanzhi Wang , Qiao Gu , Chi-Keung Tang , Yu-Wing Tai

Spatial and temporal modeling is one of the most core aspects of few-shot action recognition. Most previous works mainly focus on long-term temporal relation modeling based on high-level spatial representations, without considering the…

Computer Vision and Pattern Recognition · Computer Science 2023-04-11 Jiazheng Xing , Mengmeng Wang , Yong Liu , Boyu Mu

Diffusion models have made significant advances in generating high-quality images, but their application to video generation has remained challenging due to the complexity of temporal motion. Zero-shot video editing offers a solution by…

Computer Vision and Pattern Recognition · Computer Science 2023-12-20 Xirui Li , Chao Ma , Xiaokang Yang , Ming-Hsuan Yang

Temporal modeling plays a crucial role in understanding video content. To tackle this problem, previous studies built complicated temporal relations through time sequence thanks to the development of computationally powerful devices. In…

Computer Vision and Pattern Recognition · Computer Science 2023-08-23 Wenhao Wu , Yuxin Song , Zhun Sun , Jingdong Wang , Chang Xu , Wanli Ouyang

Online Temporal Action Localization (On-TAL) aims to detect the occurrence time and category of actions in untrimmed streaming videos immediately upon their completion. Recent advancements in this field focus on developing more…

Computer Vision and Pattern Recognition · Computer Science 2026-05-12 Chaolei Han , Hongsong Wang , Xin Gong , Jie Gui

Vision-based fall analysis has advanced rapidly, but a key bottleneck remains: visually similarmotions can correspond to very different physical outcomes because small differences in contactmechanics and protective responses are hard to…

Computer Vision and Pattern Recognition · Computer Science 2026-03-17 Xianqi Zhang

Fine-grained human action recognition (FHAR) is challenging because visually similar actions differ by subtle spatio-temporal cues. Many recent systems enhance discriminability with extra modalities (e.g., pose, text, optical flow), but…

Computer Vision and Pattern Recognition · Computer Science 2026-04-14 Imtiaz Ul Hassan , Nik Bessis , Ardhendu Behera

Weakly-Supervised Video Anomaly Detection aims to identify anomalous events using only video-level labels, balancing annotation efficiency with practical applicability. However, existing methods often oversimplify the anomaly space by…

Computer Vision and Pattern Recognition · Computer Science 2025-12-30 Junhee Lee , ChaeBeen Bang , MyoungChul Kim , MyeongAh Cho

Temporal action localization plays an important role in video analysis, which aims to localize and classify actions in untrimmed videos. The previous methods often predict actions on a feature space of a single-temporal scale. However, the…

Computer Vision and Pattern Recognition · Computer Science 2022-08-17 Zan Gao , Xinglei Cui , Tao Zhuo , Zhiyong Cheng , An-An Liu , Meng Wang , Shenyong Chen

Weakly supervised temporal action localization is a challenging vision task due to the absence of ground-truth temporal locations of actions in the training videos. With only video-level supervision during training, most existing methods…

Computer Vision and Pattern Recognition · Computer Science 2021-03-26 Ashraful Islam , Chengjiang Long , Richard Radke

Deep learning models, in particular \textit{image} models, have recently gained generalisability and robustness. %are becoming more general and robust by the day. In this work, we propose to exploit such advances in the realm of…

Computer Vision and Pattern Recognition · Computer Science 2024-11-05 Tanay Agrawal , Abid Ali , Antitza Dantcheva , Francois Bremond

This paper studies how to introduce viewpoint-invariant feature representations that can help action recognition and detection. Although we have witnessed great progress of action recognition in the past decade, it remains challenging yet…

Computer Vision and Pattern Recognition · Computer Science 2020-12-07 Junwei Liang , Liangliang Cao , Xuehan Xiong , Ting Yu , Alexander Hauptmann