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We address the problem of temporal localization of repetitive activities in a video, i.e., the problem of identifying all segments of a video that contain some sort of repetitive or periodic motion. To do so, the proposed method represents…

计算机视觉与模式识别 · 计算机科学 2019-10-15 Giorgos Karvounas , Iason Oikonomidis , Antonis Argyros

We consider the problem of conducting frame rate dependent video quality assessment (VQA) on videos of diverse frame rates, including high frame rate (HFR) videos. More generally, we study how perceptual quality is affected by frame rate,…

多媒体 · 计算机科学 2021-09-28 Pavan C. Madhusudana , Neil Birkbeck , Yilin Wang , Balu Adsumilli , Alan C. Bovik

Most existing real-time deep models trained with each frame independently may produce inconsistent results across the temporal axis when tested on a video sequence. A few methods take the correlations in the video sequence into…

计算机视觉与模式识别 · 计算机科学 2022-02-28 Yifan Liu , Chunhua Shen , Changqian Yu , Jingdong Wang

Abnormal event detection or anomaly detection in surveillance videos is currently a challenge because of the diversity of possible events. Due to the lack of anomalous events at training time, anomaly detection requires the design of…

计算机视觉与模式识别 · 计算机科学 2024-09-17 Darshan Venkatrayappa

With the development of video understanding, there is a proliferation of tasks for clip-level temporal video analysis, including temporal action detection (TAD), temporal action segmentation (TAS), and generic event boundary detection…

计算机视觉与模式识别 · 计算机科学 2024-09-30 Min Yang , Zichen Zhang , Limin Wang

Understanding abnormal events in videos is a vital and challenging task that has garnered significant attention in a wide range of applications. Although current video understanding Multi-modal Large Language Models (MLLMs) are capable of…

计算机视觉与模式识别 · 计算机科学 2025-11-04 Yingxian Chen , Jiahui Liu , Ruidi Fan , Yanwei Li , Chirui Chang , Shizhen Zhao , Wilton W. T. Fok , Xiaojuan Qi , Yik-Chung Wu

Video Copy Detection (VCD) plays a crucial role in copyright protection and content verification by identifying duplicates and near-duplicates in large-scale video databases. The META AI Challenge on video copy detection provided a…

计算机视觉与模式识别 · 计算机科学 2025-01-22 Katarzyna Fojcik , Piotr Syga

Motivated by the previous success of Two-Dimensional Convolutional Neural Network (2D CNN) on image recognition, researchers endeavor to leverage it to characterize videos. However, one limitation of applying 2D CNN to analyze videos is…

计算机视觉与模式识别 · 计算机科学 2020-07-16 Junwu Weng , Donghao Luo , Yabiao Wang , Ying Tai , Chengjie Wang , Jilin Li , Feiyue Huang , Xudong Jiang , Junsong Yuan

Video-based person re-identification (ReID) is a challenging problem, where some video tracks of people across non-overlapping cameras are available for matching. Feature aggregation from a video track is a key step for video-based person…

计算机视觉与模式识别 · 计算机科学 2019-04-30 Xingyu Liao , Lingxiao He , Zhouwang Yang , Chi Zhang

How to make a segmentation model efficiently adapt to a specific video and to online target appearance variations are fundamentally crucial issues in the field of video object segmentation. In this work, a graph memory network is developed…

计算机视觉与模式识别 · 计算机科学 2020-12-10 Xiankai Lu , Wenguan Wang , Martin Danelljan , Tianfei Zhou , Jianbing Shen , Luc Van Gool

Conventional video segmentation approaches rely heavily on appearance models. Such methods often use appearance descriptors that have limited discriminative power under complex scenarios. To improve the segmentation performance, this paper…

计算机视觉与模式识别 · 计算机科学 2018-03-26 Wenguan Wang , Jianbing Shen , Fatih Porikli

Video anomaly detection aims to discover abnormal events in videos, and the principal objects are target objects such as people and vehicles. Each target in the video data has rich spatio-temporal context information. Most existing methods…

计算机视觉与模式识别 · 计算机科学 2022-11-23 Chao Hu , Weibin Qiu , Weijie Wu , Liqiang Zhu

Boundary information plays a significant role in 2D image segmentation, while usually being ignored in 3D point cloud segmentation where ambiguous features might be generated in feature extraction, leading to misclassification in the…

计算机视觉与模式识别 · 计算机科学 2021-01-08 Jingyu Gong , Jiachen Xu , Xin Tan , Jie Zhou , Yanyun Qu , Yuan Xie , Lizhuang Ma

We present a method for temporally consistent motion segmentation from RGB-D videos assuming a piecewise rigid motion model. We formulate global energies over entire RGB-D sequences in terms of the segmentation of each frame into a number…

计算机视觉与模式识别 · 计算机科学 2016-08-17 Peter Bertholet , Alexandru-Eugen Ichim , Matthias Zwicker

Boundary estimation in images and videos has been a very active topic of research, and organizing visual information into boundaries and segments is believed to be a corner stone of visual perception. While prior work has focused on…

计算机视觉与模式识别 · 计算机科学 2017-11-27 Apratim Bhattacharyya , Mateusz Malinowski , Bernt Schiele , Mario Fritz

Collecting overhead imagery using an event camera is desirable due to the energy efficiency of the image sensor compared to standard cameras. However, event cameras complicate downstream image processing, especially for complex tasks such…

计算机视觉与模式识别 · 计算机科学 2024-02-13 Darryl Hannan , Ragib Arnab , Gavin Parpart , Garrett T. Kenyon , Edward Kim , Yijing Watkins

Glass surface ubiquitous in both daily life and professional environments presents a potential threat to vision-based systems, such as robot and drone navigation. To solve this challenge, most recent studies have shown significant interest…

计算机视觉与模式识别 · 计算机科学 2026-01-21 Yiwei Lu , Hao Huang , Tao Yan

In the field of action recognition, video clips are always treated as ordered frames for subsequent processing. To achieve spatio-temporal perception, existing approaches propose to embed adjacent temporal interaction in the convolutional…

计算机视觉与模式识别 · 计算机科学 2022-02-01 Rongchang Li , Xiao-Jun Wu , Tianyang Xu

Abnormality detection in video poses particular challenges due to the infinite size of the class of all irregular objects and behaviors. Thus no (or by far not enough) abnormal training samples are available and we need to find…

计算机视觉与模式识别 · 计算机科学 2015-02-24 Borislav Antić , Björn Ommer

Shot boundary detection in video is one of the key stages of video data processing. A new method for shot boundary detection based on several video features, such as color histograms and object boundaries, has been proposed. The developed…

计算机视觉与模式识别 · 计算机科学 2021-09-03 Alexander Gushchin , Anastasia Antsiferova , Dmitriy Vatolin