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Mainstream visual object tracking frameworks predominantly rely on template matching paradigms. Their performance heavily depends on the quality of template features, which becomes increasingly challenging to maintain in complex scenarios…

计算机视觉与模式识别 · 计算机科学 2025-03-24 Meng Zhou , Jiadong Xie , Mingsheng Xu

We present a method to accelerate global illumination computation in dynamic environments by taking advantage of limitations of the human visual system. A model of visual attention is used to locate regions of interest in a scene and to…

图形学 · 计算机科学 2007-05-23 Yang Li Hector Yee

Spatiotemporal action recognition deals with locating and classifying actions in videos. Motivated by the latest state-of-the-art real-time object detector You Only Watch Once (YOWO), we aim to modify its structure to increase action…

计算机视觉与模式识别 · 计算机科学 2020-12-16 Shentong Mo , Xiaoqing Tan , Jingfei Xia , Pinxu Ren

Action Detection is a complex task that aims to detect and classify human actions in video clips. Typically, it has been addressed by processing fine-grained features extracted from a video classification backbone. Recently, thanks to the…

计算机视觉与模式识别 · 计算机科学 2021-03-02 Matteo Tomei , Lorenzo Baraldi , Simone Calderara , Simone Bronzin , Rita Cucchiara

Inspired by recent advances in neural machine translation, that jointly align and translate using encoder-decoder networks equipped with attention, we propose an attentionbased LSTM model for human activity recognition. Our model jointly…

计算机视觉与模式识别 · 计算机科学 2017-09-01 Atousa Torabi , Leonid Sigal

Safe and efficient navigation in dynamic environments shared with humans remains an open and challenging task for mobile robots. Previous works have shown the efficacy of using reinforcement learning frameworks to train policies for…

机器人学 · 计算机科学 2024-01-15 Yanying Zhou , Jochen Garcke

Mobile devices and the Internet of Things (IoT) devices nowadays generate a large amount of heterogeneous spatial-temporal data. It remains a challenging problem to model the spatial-temporal dynamics under privacy concern. Federated…

机器学习 · 计算机科学 2024-11-05 Kaiyuan Li , Yihan Zhang , Huandong Wang , Yan Zhuo , Xinlei Chen

Weakly supervised video anomaly detection (WS-VAD) is a challenging problem that aims to learn VAD models only with video-level annotations. In this work, we propose a Long-Short Temporal Co-teaching (LSTC) method to address the WS-VAD…

计算机视觉与模式识别 · 计算机科学 2023-04-05 Shengyang Sun , Xiaojin Gong

Using offline training schemes, researchers have tackled the event segmentation problem by providing full or weak-supervision through manually annotated labels or self-supervised epoch-based training. Most works consider videos that are at…

计算机视觉与模式识别 · 计算机科学 2021-07-20 Ramy Mounir , Roman Gula , Jörn Theuerkauf , Sudeep Sarkar

The key success factor of the video deblurring methods is to compensate for the blurry pixels of the mid-frame with the sharp pixels of the adjacent video frames. Therefore, mainstream methods align the adjacent frames based on the…

计算机视觉与模式识别 · 计算机科学 2022-07-25 Huicong Zhang , Haozhe Xie , Hongxun Yao

Training temporal action detection in videos requires large amounts of labeled data, yet such annotation is expensive to collect. Incorporating unlabeled or weakly-labeled data to train action detection model could help reduce annotation…

计算机视觉与模式识别 · 计算机科学 2021-02-19 Baifeng Shi , Qi Dai , Judy Hoffman , Kate Saenko , Trevor Darrell , Huijuan Xu

Deep learning-based computer vision technology has grown stronger in recent years, and cross-fertilization using computer vision technology has been a popular direction in recent years. The use of computer vision technology to identify…

计算机视觉与模式识别 · 计算机科学 2023-03-21 Zhifeng Wang , Jialong Yao , Chunyan Zeng , Wanxuan Wu , Hongmin Xu , Yang Yang

First-person action recognition is a challenging task in video understanding. Because of strong ego-motion and a limited field of view, many backgrounds or noisy frames in a first-person video can distract an action recognition model during…

计算机视觉与模式识别 · 计算机科学 2021-12-03 Lijin Yang , Yifei Huang , Yusuke Sugano , Yoichi Sato

Spatiotemporal data is increasingly available due to emerging sensor and data acquisition technologies that track moving objects. Spatiotemporal clustering addresses the need to efficiently discover patterns and trends in moving object…

机器学习 · 计算机科学 2024-04-16 Olga Dorabiala , Devavrat Vivek Dabke , Jennifer Webster , Nathan Kutz , Aleksandr Aravkin

Existing approaches for spatio-temporal action detection in videos are limited by the spatial extent and temporal duration of the actions. In this paper, we present a modular system for spatio-temporal action detection in untrimmed security…

计算机视觉与模式识别 · 计算机科学 2018-11-26 Joshua Gleason , Rajeev Ranjan , Steven Schwarcz , Carlos D. Castillo , Jun-Chen Cheng , Rama Chellappa

We propose a semi-supervised approach for contemporary object detectors following the teacher-student dual model framework. Our method is featured with 1) the exponential moving averaging strategy to update the teacher from the student…

计算机视觉与模式识别 · 计算机科学 2021-06-22 Yihe Tang , Weifeng Chen , Yijun Luo , Yuting Zhang

In this work, we propose an approach to the spatiotemporal localisation (detection) and classification of multiple concurrent actions within temporally untrimmed videos. Our framework is composed of three stages. In stage 1, appearance and…

计算机视觉与模式识别 · 计算机科学 2016-08-05 Suman Saha , Gurkirt Singh , Michael Sapienza , Philip H. S. Torr , Fabio Cuzzolin

In the context of label-efficient learning on video data, the distillation method and the structural design of the teacher-student architecture have a significant impact on knowledge distillation. However, the relationship between these…

计算机视觉与模式识别 · 计算机科学 2023-07-18 Chao Wang , Zheng Tang

Classroom activity detection (CAD) focuses on accurately classifying whether the teacher or student is speaking and recording both the length of individual utterances during a class. A CAD solution helps teachers get instant feedback on…

音频与语音处理 · 电气工程与系统科学 2020-02-12 Hang Li , Yu Kang , Wenbiao Ding , Song Yang , Songfan Yang , Gale Yan Huang , Zitao Liu

Taking advantage of human pose data for understanding human activities has attracted much attention these days. However, state-of-the-art pose estimators struggle in obtaining high-quality 2D or 3D pose data due to occlusion, truncation and…

计算机视觉与模式识别 · 计算机科学 2020-11-12 Di Yang , Rui Dai , Yaohui Wang , Rupayan Mallick , Luca Minciullo , Gianpiero Francesca , Francois Bremond