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Real-time and online action localization in a video is a critical yet highly challenging problem. Accurate action localization requires the utilization of both temporal and spatial information. Recent attempts achieve this by using…

计算机视觉与模式识别 · 计算机科学 2021-11-08 Kalana Abeywardena , Shechem Sumanthiran , Sakuna Jayasundara , Sachira Karunasena , Ranga Rodrigo , Peshala Jayasekara

Temporal action localization is an important yet challenging task in video understanding. Typically, such a task aims at inferring both the action category and localization of the start and end frame for each action instance in a long,…

计算机视觉与模式识别 · 计算机科学 2021-03-25 Chuming Lin , Chengming Xu , Donghao Luo , Yabiao Wang , Ying Tai , Chengjie Wang , Jilin Li , Feiyue Huang , Yanwei Fu

The unprecedented surge in video data production in recent years necessitates efficient tools to extract meaningful frames from videos for downstream tasks. Long-term temporal reasoning is a key desideratum for frame retrieval systems.…

计算机视觉与模式识别 · 计算机科学 2024-12-04 Minkyu Choi , Harsh Goel , Mohammad Omama , Yunhao Yang , Sahil Shah , Sandeep Chinchali

Historically, researchers in the field have spent a great deal of effort to create image representations that have scale invariance and retain spatial location information. This paper proposes to encode equivalent temporal characteristics…

计算机视觉与模式识别 · 计算机科学 2014-09-01 Zhenzhong Lan , Xuanchong Li , Alexandar G. Hauptmann

Deep neural networks based methods have been proved to achieve outstanding performance on object detection and classification tasks. Despite significant performance improvement, due to the deep structures, they still require prohibitive…

计算机视觉与模式识别 · 计算机科学 2020-01-08 Mohammad Farhadi , Yezhou Yang

Temporal Action Localization (TAL) is a critical task in video analysis, identifying precise start and end times of actions. Existing methods like CNNs, RNNs, GCNs, and Transformers have limitations in capturing long-range dependencies and…

计算机视觉与模式识别 · 计算机科学 2024-07-19 Sangyoun Lee , Juho Jung , Changdae Oh , Sunghee Yun

Semi-supervised video action recognition tends to enable deep neural networks to achieve remarkable performance even with very limited labeled data. However, existing methods are mainly transferred from current image-based methods (e.g.,…

计算机视觉与模式识别 · 计算机科学 2022-04-26 Junfei Xiao , Longlong Jing , Lin Zhang , Ju He , Qi She , Zongwei Zhou , Alan Yuille , Yingwei Li

Previous methods based on 3DCNN, convLSTM, or optical flow have achieved great success in video salient object detection (VSOD). However, they still suffer from high computational costs or poor quality of the generated saliency maps. To…

计算机视觉与模式识别 · 计算机科学 2024-01-02 Xing Zhao , Haoran Liang , Peipei Li , Guodao Sun , Dongdong Zhao , Ronghua Liang , Xiaofei He

In this paper, we investigate a weakly-supervised object detection framework. Most existing frameworks focus on using static images to learn object detectors. However, these detectors often fail to generalize to videos because of the…

计算机视觉与模式识别 · 计算机科学 2017-08-03 Yuan Yuan , Xiaodan Liang , Xiaolong Wang , Dit-Yan Yeung , Abhinav Gupta

We address the problem of activity detection in continuous, untrimmed video streams. This is a difficult task that requires extracting meaningful spatio-temporal features to capture activities, accurately localizing the start and end times…

计算机视觉与模式识别 · 计算机科学 2017-09-04 Huijuan Xu , Abir Das , Kate Saenko

Temporal moment localization aims to retrieve the best video segment matching a moment specified by a query. The existing methods generate the visual and semantic embeddings independently and fuse them without full consideration of the…

计算机视觉与模式识别 · 计算机科学 2021-09-08 Jungkyoo Shin , Jinyoung Moon

Video temporal action detection aims to temporally localize and recognize the action in untrimmed videos. Existing one-stage approaches mostly focus on unifying two subtasks, i.e., localization of action proposals and classification of each…

计算机视觉与模式识别 · 计算机科学 2019-04-17 Yupan Huang , Qi Dai , Yutong Lu

Detecting actions in untrimmed videos is an important yet challenging task. In this paper, we present the structured segment network (SSN), a novel framework which models the temporal structure of each action instance via a structured…

计算机视觉与模式识别 · 计算机科学 2017-09-19 Yue Zhao , Yuanjun Xiong , Limin Wang , Zhirong Wu , Xiaoou Tang , Dahua Lin

Recently, temporal action localization (TAL), i.e., finding specific action segments in untrimmed videos, has attracted increasing attentions of the computer vision community. State-of-the-art solutions for TAL involves evaluating the…

计算机视觉与模式识别 · 计算机科学 2021-03-01 Peisen Zhao , Lingxi Xie , Chen Ju , Ya Zhang , Yanfeng Wang , Qi Tian

We address the problem of temporal activity detection in continuous, untrimmed video streams. This is a difficult task that requires extracting meaningful spatio-temporal features to capture activities, accurately localizing the start and…

计算机视觉与模式识别 · 计算机科学 2019-06-07 Huijuan Xu , Abir Das , Kate Saenko

Real-time semantic video segmentation is a challenging task due to the strict requirements of inference speed. Recent approaches mainly devote great efforts to reducing the model size for high efficiency. In this paper, we rethink this…

计算机视觉与模式识别 · 计算机科学 2020-08-19 Junyi Feng , Songyuan Li , Xi Li , Fei Wu , Qi Tian , Ming-Hsuan Yang , Haibin Ling

Effective spatiotemporal feature representation is crucial to the video-based action recognition task. Focusing on discriminate spatiotemporal feature learning, we propose Information Fused Temporal Transformation Network (IF-TTN) for…

计算机视觉与模式识别 · 计算机科学 2019-04-12 Ke Yang , Peng Qiao , Dongsheng Li , Yong Dou

Locating actions in long untrimmed videos has been a challenging problem in video content analysis. The performances of existing action localization approaches remain unsatisfactory in precisely determining the beginning and the end of an…

计算机视觉与模式识别 · 计算机科学 2018-06-27 Haonan Qiu , Yingbin Zheng , Hao Ye , Yao Lu , Feng Wang , Liang He

Recently, there is a surge in interest surrounding video large language models (Video LLMs). However, existing benchmarks fail to provide a comprehensive feedback on the temporal perception ability of Video LLMs. On the one hand, most of…

计算机视觉与模式识别 · 计算机科学 2024-06-04 Yuanxin Liu , Shicheng Li , Yi Liu , Yuxiang Wang , Shuhuai Ren , Lei Li , Sishuo Chen , Xu Sun , Lu Hou

State-of-the-art temporal action detectors inefficiently search the entire video for specific actions. Despite the encouraging progress these methods achieve, it is crucial to design automated approaches that only explore parts of the video…

计算机视觉与模式识别 · 计算机科学 2018-07-30 Humam Alwassel , Fabian Caba Heilbron , Bernard Ghanem